Hp Deskjet 940c Manual

OS X v10.8 Mountain Lion, OS X v10.9 Mavericks, OS X v10.10 Yosemite; 1 GB HD; Internet; USBWindows 10, 8.1, 8, 7: 1 GHz 32-bit (x86) or 64-bit (x64) processor, 2 GB available hard disk space, CD-ROM/DVD drive or Internet connection, USB port, Internet Explorer. Windows Vista: 800 MHz 32-bit (x86) or 64-bit (x64) processor, 2 GB available hard disk space, CD-ROM/DVD drive or Internet connection, USB port, Internet Explorer 8.

Windows XP SP3 or higher (32-bit only): any Intel® Pentium® II, Celeron® or 233 MHz compatible processor, 850 MB available hard disk space, CD-ROM/DVD drive or Internet connection, USB port, Internet Explorer 8. 1 Based on IDC’s Worldwide Quarterly Hardcopy Peripherals Tracker®, 2012 Q4. Shipments for inkjet single-function printers and multifunction printers, including production units. 2 Based on HP 63XL High Yield Black Original Ink Cartridges. High-yield ink cartridges not included; purchase separately. For more information, see Less cost per page compared with estimated street price and published page yield of standard-yield HP 63 Original Ink Cartridges.

Actual pricing may vary. 3 Program availability varies. Original HP cartridge return and recycling is currently available in more than 49 countries, territories, and regions in Asia, Europe, and North and South America through the HP Planet Partners program. For more information, visit http://www.hp.com/recycle. Compact and wireless, this printer is designed to fit your space and life and save you up to 50% on ink with HP Instant Ink.

Get vibrant color and power in the world’s smallest all-in-one for home.HP Photo and Document All-in-One Printers are designed for families and other home users who want a device capable of printing everything from documents, email and web pages to rich, bright lab-quality photos - with copy and scan tools too.Dynamic security enabled printer. Intended to be used with cartridges using only HP original electronic circuitry. Cartridges with modified or non-HP electronic circuitry may not work, and those that work today may not work in the future.http://www.hp.com/go/learnaboutsupplies. OS X v10.11 El Capitan, OS X v10.10 Yosemite, OS X v10.9 Mavericks, 1 GB HD; Internet; USBWindows 10, 8.1, 8, 7: 32-bit or 64-bit, 2 GB available hard disk space, CD-ROM/DVD drive or Internet connection, USB port, Internet Explorer. Windows Vista: (32-bit only), 2 GB available hard disk space, CD-ROM/DVD drive or Internet connection, USB port, Internet Explorer 8. Windows XP SP3 or higher (32-bit only): any Intel Pentium II, Celeron or 233 MHz compatible processor, 850 MB available hard disk space, CD-ROM/DVD drive or Internet connection, USB port, Internet Explorer 8. 1 Savings claim is based on HP Instant Ink Service plan price for 12 months using all pages in plan without purchase of additional pages compared with the cost per page (CPP) of the majority of color inkjet printers.

Compact and wireless, this printer is designed to fit your space and life and save you up to 50% on ink with HP Instant Ink. Get vibrant color and power in the world’s smallest all-in-one for home.HP Photo and Document All-in-One Printers are designed for families and other home users who want a device capable of printing everything from documents, email and web pages to rich, bright lab-quality photos - with copy and scan tools too.Dynamic security enabled printer. Intended to be used with cartridges using only HP original electronic circuitry. Cartridges with modified or non-HP electronic circuitry may not work, and those that work today may not work in the future.http://www.hp.com/go/learnaboutsupplies. OS X v10.11 El Capitan, OS X v10.10 Yosemite, OS X v10.9 Mavericks, 1 GB HD; Internet; USBWindows 10, 8.1, 8, 7: 32-bit or 64-bit, 2 GB available hard disk space, CD-ROM/DVD drive or Internet connection, USB port, Internet Explorer. Windows Vista: (32-bit only), 2 GB available hard disk space, CD-ROM/DVD drive or Internet connection, USB port, Internet Explorer 8.

Windows XP SP3 or higher (32-bit only): any Intel Pentium II, Celeron or 233 MHz compatible processor, 850 MB available hard disk space, CD-ROM/DVD drive or Internet connection, USB port, Internet Explorer 8. 1 Savings claim is based on HP Instant Ink Service plan price for 12 months using all pages in plan without purchase of additional pages compared with the cost per page (CPP) of the majority of color inkjet printers.

Compact and wireless, this printer is designed to fit your space and life and save you up to 50% on ink with HP Instant Ink. Get vibrant color and power in the world’s smallest all-in-one for home.HP Photo and Document All-in-One Printers are designed for families and other home users who want a device capable of printing everything from documents, email and web pages to rich, bright lab-quality photos - with copy and scan tools too.Dynamic security enabled printer. Intended to be used with cartridges using only HP original electronic circuitry. Cartridges with modified or non-HP electronic circuitry may not work, and those that work today may not work in the future.http://www.hp.com/go/learnaboutsupplies. OS X v10.11 El Capitan, OS X v10.10 Yosemite, OS X v10.9 Mavericks, 1 GB HD; Internet; USBWindows 10, 8.1, 8, 7: 32-bit or 64-bit, 2 GB available hard disk space, CD-ROM/DVD drive or Internet connection, USB port, Internet Explorer. Windows Vista: (32-bit only), 2 GB available hard disk space, CD-ROM/DVD drive or Internet connection, USB port, Internet Explorer 8. Windows XP SP3 or higher (32-bit only): any Intel Pentium II, Celeron or 233 MHz compatible processor, 850 MB available hard disk space, CD-ROM/DVD drive or Internet connection, USB port, Internet Explorer 8.

1 Savings claim is based on HP Instant Ink Service plan price for 12 months using all pages in plan without purchase of additional pages compared with the cost per page (CPP) of the majority of color inkjet printers. Save time and money with HP's most affordable wireless all-in-one printer to date. With a hassle-free setup and easy printing from your mobile devices, the HP DeskJet 2655 All-in-One removes the complications of your everyday printing needs.HP Photo and Document All-in-One Printers are designed for families and other home users who want a device capable of printing everything from documents, email and web pages to rich, bright lab-quality photos - with copy and scan tools too.Dynamic security enabled printer. Intended to be used with cartridges using only HP original electronic circuitry. Cartridges with modified or non-HP electronic circuitry may not work, and those that work today may not work in the future.http://www.hp.com/go/learnaboutsupplies. OS X v10.10 Yosemite, OS X v10.11 El Capitan, OS X v10.12 Sierra; 1 GB HD; Internet accessWindows 10, 8.1, 8, 7: 1 GHz 32-bit (x86) or 64-bit (x64) processor, 2 GB available hard disk space, CD-ROM/DVD drive or Internet connection, USB port, Microsoft® Internet Explorer.

Windows Vista (32-bit only): 800 MHz 32-bit (x86) processor, 2 GB available hard disk space, CD-ROM/DVD drive or Internet connection, USB port, Microsoft® Internet Explorer 8.Windows XP SP3 or higher (32-bit only): any Intel® Pentium® II, Celeron® or 233 MHz compatible processor, 850 MB available hard disk space, CD-ROM/DVD drive or Internet connection, USB port, Internet Explorer 8. 1For details on local printing requirements see hp.com/go/mobile printing 2 Savings claim is based on HP Instant Ink Service plan price for 12 months using all pages in plan without purchase of additional pages compared with the cost per page (CPP) of the majority of color inkjet printers. Save time and money with HP's most affordable wireless all-in-one printer to date. With a hassle-free setup and easy printing from your mobile devices, the HP DeskJet 2655 All-in-One removes the complications of your everyday printing needs.HP Photo and Document All-in-One Printers are designed for families and other home users who want a device capable of printing everything from documents, email and web pages to rich, bright lab-quality photos - with copy and scan tools too.Dynamic security enabled printer. Intended to be used with cartridges using only HP original electronic circuitry. Cartridges with modified or non-HP electronic circuitry may not work, and those that work today may not work in the future.http://www.hp.com/go/learnaboutsupplies.

OS X v10.10 Yosemite, OS X v10.11 El Capitan, OS X v10.12 Sierra; 1 GB HD; Internet accessWindows 10, 8.1, 8, 7: 1 GHz 32-bit (x86) or 64-bit (x64) processor, 2 GB available hard disk space, CD-ROM/DVD drive or Internet connection, USB port, Microsoft® Internet Explorer. Windows Vista (32-bit only): 800 MHz 32-bit (x86) processor, 2 GB available hard disk space, CD-ROM/DVD drive or Internet connection, USB port, Microsoft® Internet Explorer 8.Windows XP SP3 or higher (32-bit only): any Intel® Pentium® II, Celeron® or 233 MHz compatible processor, 850 MB available hard disk space, CD-ROM/DVD drive or Internet connection, USB port, Internet Explorer 8. 1For details on local printing requirements see hp.com/go/mobile printing 2 Savings claim is based on HP Instant Ink Service plan price for 12 months using all pages in plan without purchase of additional pages compared with the cost per page (CPP) of the majority of color inkjet printers. How do I find my serial number? Desktops & All-in-OnesSome products utilize the keyboard shortcut 'Ctrl + Alt + S'; the product information will appear after a short delay. If that doesn't work, this information can also be found on your bar code stickers, typically located on the back of your product. NotebooksSome products utilize the keyboard shortcut 'Fn + Esc'; the product information will appear after a short delay.

If that doesn't work, this information can also be found on your bar code stickers, which may be located behind the battery. Printers (Both HP and Samsung)Look for the bar code stickers on your printer.The Serial number on a Samsung printer can be used wherever an HP serial number is requested.

Samsung printers refer to a 'product number' as a 'model code' designated with 'M/C', and typically start with 'SL-'. TabletsYour product information is typically located on the back or bottom edge of your product. The affordable and easy-to-use HP DeskJetIt’s never been easier or more affordable to upgrade your printing routine thanks to the reliability and varied options across our line.The HP DeskJet printer is so compact that it can work itself comfortability into even the most densely packed desk or counter space. Both basic and premium models measure just over a foot wide, while every other dimension comes in at mere inches.Featuring a high-capacity 60-sheet input tray and an entry price that just can’t be beat - our starts at only $29.99 - you can give your office a boost and ditch the clutter at the same time.Our DeskJet also ships with our own suite of related software, including HP Photo Creations, for photographers, family projects, or any related project you’re getting ready to tackle. High-efficiency printingIn a busy office or an active home, printers end up taking a lot of punishment.

That’s why we’ve streamlined our HP DeskJet printer into a compact and durable design, geared toward doing the basics well and making sure it can keep up for a long time to come. You can also say goodbye to most compatibility issues and the old specter of lengthy, noisy print jobs with this efficient printing solution.Are you trying to avoid increasing the clutter in your workspace with more hardware? Or maybe you’re just ready to stop relying on an oversized multi-function printer?Try our multi-function models for an easy scanning and copying experience.

More than just an uptick in basic features, these are among the world’s smallest all-in-ones, so you still won’t be paying a premium in desk space.You can scan multiple pages quickly and easily using HP Scroll Scan or go mobile and coordinate complex jobs using the HP All-in-One Printer Remote app on your tablet or phone. Get ready for HP Instant InkIf you’re tired of the headaches and hassle that come with keeping up with your printer’s ink levels or refilling your existing depleted cartridges, try out our refill service.When you subscribe to one of our affordable Instant Ink plans (starting with a free option), your Instant Ink-enabled printer will automatically detect low ink levels and have a new cartridge shipped right to your door. There are no shipping costs or annual fees, and we even take care of recycling.Do everything with the stylish DeskJet 3755 All-in-OneBuilt for easy use and a discreet office presence, each DeskJet is a powerful tool, but the is a truly top-of-the-line printer.The 3755 is designed to handle routine use for photo, document, and even unusual paper types without sacrificing print quality in any scenario.

Rated one of the world’s smallest all-in-one models, it also has a stylish exterior design available in a variety of colors.Scan multiple pages quickly and easily using HP Scroll Scan or go mobile and coordinate complex jobs using the HP All-in-One Printer Remote app on your tablet or phone. Low impact and always environmentally friendlyIf you want to make sure you’re mitigating your printer’s environmental impact as much as possible, you can feel confident knowing all variations of the HP DeskJet Printer are Energy Star® certified. That includes several devices that boast CECP and EPEAT® qualifications as well.We know that some of who you are looking to keep up with recycling your spent cartridges don’t want an enabled printer. Or maybe you just aren’t sure you’re ready to commit to HP Instant Ink. Of course, it’s still a cinch to recycle your cartridges conventionally, without the trouble or expense of driving back and forth to the office supply store, using our mail-in service.Keep your work in check without letting your energy footprint get out of control thanks to the sturdy, compact, and efficient HP DeskJet. Prices, specifications, availability and terms of offers may change without notice.

Price protection, price matching or price guarantees do not apply to Intra-day, Daily Deals or limited-time promotions. Quantity limits may apply to orders, including orders for discounted and promotional items. Despite our best efforts, a small number of items may contain pricing, typography, or photography errors. Correct prices and promotions are validated at the time your order is placed. These terms apply only to products sold by HP.com; reseller offers may vary.

Items sold by HP.com are not for immediate resale. Orders that do not comply with HP.com terms, conditions, and limitations may be cancelled.

Contract and volume customers not eligible.HP’s MSRP is subject to discount. HP’s MSRP price is shown as either a stand-alone price or as a strike-through price with a discounted or promotional price also listed. Discounted or promotional pricing is indicated by the presence of an additional higher MSRP strike-through price.The following applies to HP systems with Intel 6th Gen and other future-generation processors on systems shipping with Windows 7, Windows 8, Windows 8.1 or Windows 10 Pro systems downgraded to Windows 7 Professional, Windows 8 Pro, or Windows 8.1: This version of Windows running with the processor or chipsets used in this system has limited support from Microsoft. For more information about Microsoft’s support, please see Microsoft’s Support Lifecycle FAQ at Celeron, Celeron Inside, Core Inside, Intel, Intel Logo, Intel Atom, Intel Atom Inside, Intel Core, Intel Inside, Intel Inside Logo, Intel vPro, Itanium, Itanium Inside, Pentium, Pentium Inside, vPro Inside, Xeon, Xeon Phi, Xeon Inside, and Intel Optane are trademarks of Intel Corporation or its subsidiaries in the U.S. And/or other countries.In-home warranty is available only on select customizable HP desktop PCs. Need for in-home service is determined by HP support representative.

Hp Deskjet 940c

Customer may be required to run system self-test programs or correct reported faults by following advice given over phone. On-site services provided only if issue can't be corrected remotely. Service not available holidays and weekends.HP will transfer your name and address information, IP address, products ordered and associated costs and other personal information related to processing your application to Bill Me Later®. Bill Me Later will use that data under its privacy policy.Microsoft Windows 10: Not all features are available in all editions or versions of Windows 10. Systems may require upgraded and/or separately purchased hardware, drivers, software or BIOS update to take full advantage of Windows 10 functionality. Windows 10 is automatically updated, which is always enabled.

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How do I find my serial number? Desktops & All-in-OnesSome products utilize the keyboard shortcut 'Ctrl + Alt + S'; the product information will appear after a short delay. If that doesn't work, this information can also be found on your bar code stickers, typically located on the back of your product. NotebooksSome products utilize the keyboard shortcut 'Fn + Esc'; the product information will appear after a short delay.

If that doesn't work, this information can also be found on your bar code stickers, which may be located behind the battery. Printers (Both HP and Samsung)Look for the bar code stickers on your printer.The Serial number on a Samsung printer can be used wherever an HP serial number is requested. Samsung printers refer to a 'product number' as a 'model code' designated with 'M/C', and typically start with 'SL-'. TabletsYour product information is typically located on the back or bottom edge of your product.

After removing paper that was jammed, the printer made a grinding noise then resume and power lights start blinking. I have tried the power-off procedure and removing cartridges, etc. The only difference now is that the cartridges are stuck in the middle of the printer instead of inside at the right end.I got the printer fixed once on warranty for a similar problem - the tech person said he got step-by-step instructions for how to fix the printer from the hp site, but I can't find it anywhere. It required taking the printer apart and had something to do with realigning a slipped belt, as I recall. I just refilled my cartridges and I ran the test the colors were beautiful. The colors were perfect at the bottom. Red, pink, yellow, blue, etc.was perfect yesterday.

My problem is someone in my household changed the colors and when I printed a document that had red or blue or yellow in it, it prints these colors different. Red is burgundy, blue is green and yellow is light pink. I ran a test and at the bottom the colors have been adusted I don't get the old pattern of yellow blue red, pink, etc. I get purple, light purple, orange, green, etc.Please help. Davinder: Unfortunatly, its probably that refilled cartridge that you installed, especially seeing that the previous color cartridge was ok, even though it was probably empty. Unless you have an ink error light blinking on your printer, that printer time out problem is probably caused by your Computer System possible corrupted Printer Drivers or a failing Printer Cable, rather than the printer itself. If there is an ink error light on, it could be caused by that refilled cartridge, if its the wrong cartridge or a bad cartridge.

You can always try cleaning the electrical contacts on the refilled ink cartridge and inside the ink cartridge holder assembly, with a damp Q-Tip. Then dry the contacts with a new dry Q-Tip and retry the cartridge. If that does not help and you still have your old cartridge, try reinstalling it even if its empty and see if that printer time out problem goes away. As long as the old or empty cartridge was not causing an error condition, your printer will still print in black, as long as that old color cartridge is installed, even if its empty.Good Luck! Dwnny Conway.

Our school's 940c printer won't print. The printer cartridge light is blinking constantly. We installed new printer cartridges.

When you open the printer top, the cartridges move all of way over to the left side of the printer. What does this mean?

How can we fix it? We have gone through troubleshooting, unstalled and reinstalled the printer cd rom, we have unplugged the machine, turned it on and off, cleared and deleted print commands, etc.Please let me know as soon as possible.Thank you.Julie Griffin. The yellow arrow on the carriage is probably pointing to the replace cartridges icon. Clean the cartridge and carriage electrical contacts using a cotton swab moistened with water. If that does not cure the problem, test the cartridges in another printer.

Any Deskjet 900 series printer will work. The black cartridge can be substituted into an printer that uses a 45 cartridge.If your have cleaned the contacts and the cartridges test okay in another printer and you still get the error, consider a new printer.

Buy a new Deskjet 6122 on Ebay at a significant discount. You won't be disappointed and you can also use those new cartridges you bought.

Hi,i have a 940c and i recently put xp on my computer. I downloaded the most current driver stuff from hp and whatnot, but when using a parallel cable i am unable to print. The computer recognizes the printer but the print jobs are not getting sent. The test page will not print, but by hitting the reset button on the printer itself a page prints fine. I borrowed a buddy's usb cable and xp recognized the printer immediately and i was able to print a basic 'hello' out of wordpad. For some reason, the info isn't getting from the cpu to the printer when i use the parallel.

I really don't think i need to buy a new usb cable, but i don't really know what else to do. Hi!If I'm beeing a stupid dumbass let me know, but here is the question:Just reasently I bought a black printer cartridge for my deskjet 940c. But as soon as I plugged it in and turned on the printer the thing that holds the cartridges moved all the way over to the left side of the printer.

And the ink lamp started blinking.I noticed that the yellow marker (on the cartridge holder) would stop over the symbol for 'broken color cartridge' if my black cartridge was installed.When no cartridge was installed the yellow marker stoped over 'broken black cartridge'Wich leads to the (stupid?) question.- do I have to have a color- and black cartridge in my printer in order for it work, even if I only want to print in black and white????Ps. I've tried to clean the cartridge. HP requires that both cartridges be present and that both are making good electrical contact.An HP will print black even if the color is low or out of ink as long as the above exists. The problem is that the empty cartridge will eventually fail altogether as the cooling effect of the inks is no longer present.While it is probably too late to refurbish the color cartridge via a refill kit (empty cartridges clog both from within and out) you may save $$$ by purchasing a refurb/rebuilt color. A number of sites offer this cartridge as a rebuilt.google it up and check prices. One example (not an endorsement): 1800inkSubsequent to a successful install,refill cartridges BEFORE they run out of ink by 'topping' them off. That HP tri color is fairly easy to fill as the fill holes are on top of the cartridge itself.

Investigate this procedure by a visit to www.printerfillingstation.comChose the P/N of this cartridge and click on it for illustrated refill instructions. Abdul: If you have already cleaned the electrical contacts on the cartridges, plus the contacts inside the Print Cartridge Holder Assembly, then thats really all you can do. The chances of the cartridges being faulty are high, especially on remanufactored ink cartridges and especially on refilled ink cartridges. Cartridges were not built to be refuilled and eventually simply fail, especially when the HP experation date, that is stamped on each cartridge, is way past its expiration period 6 months to a year normally.Denny Conway. DominicRemove the rear access door and clean the feed rollers with a damp cloth. If that solves the problem, apply rubber rejuvenator as a long term fix.NatashaThe printer perceives, for whatever reason, that the color cartridge is not usable. Clean the cartridge and carriage electrical contacts with a cotton swab moistened with water before doing anything else.

If you have the correct cartridges and your printer still shows a color cartridge error, odds are that you have a defective or empty cartidge. I just installed two new (HP-original) cartridges in my printer. The problem is that now the printer wont print in black, just colour.I reinstalled my old working cartridges, only to find that the problem was still there.HP toolbox reports both cartridges in good health and 90% ink remaining on both.The funny thing is that when I remove the HP-printerdriver and use the incorporated win-XP driver instead i can print the black colours, but it is using the tri-colour cartridge to mix up a sort of grey-ish black. With the HP-driver the page just comes out blank.Help anyone? Everything worked ok the minute before I replaced the cartridges. The black cartridge in this 940c is the short fill #15.an inferior copy (looks identical.isn't) of the reliable 51645.One fix would be to purchase a model 6122 printer.a discontinued product still available new on Ebay and elsewhere for about $140 plus shipping.

It uses the 51645 black. Why discontinued? Perhaps because it does not have the sophisticated electronics that prohibit the use of refilled or remanufactured cartridges.HP margins on the ink and supplies greatly exceed those on the hardware, I suspect. Anonymous: When a printer prints 'jibberish' random symbols and characters, or has communication problems, its usually caused by: #1 a bad parallel printer cable old cable/poor quality cable: not bi-directional printer cable, or not IEEE-1284 rated cable.

Inexpensive parallel cables are not usually shielded enough and are not always bi-directional.TECH NOTE: If you are using a USB CABLE, you will usually you have less communication problems caused by a bad or corrupted USB cable, but its possible.#2 bad printer drivers: printer drivers are usually available online from EPSON and HP at no charge; remove/de-install your old printer drivers and then go online and download the newest drivers available for your printer. If you use your old CD that came with your printer, then your not getting the latest changes/updates available free from Epson or HP. There are more steps involved with correctly installing USB DRIVERS and if not done correctly can cause additional problems. Epson has in-depth information available that I can post if you let me know thru this 'printer repair site'.#3 It's possible that the actual SOFTWARE you are using to do a print job from, may be causing problems Word, Office, Excel, etc. You can try using a different software to print from and see if your problem goes away. If it does, then you may need to have your software removed and reinstalled. It's possible that something may have corrupted it and is causing problems.#4 Its possible that internal settings on your PC may be not set correctly, but that would normally require a PC trained person to check your system and make changes BIOS settings.#5 Its also possible that a VIRUS can cause problems with printers.

Even if you have a virus protection program installed on your PC, it has to be updated regularly to protect against possible new, or modified virus'.#6 If new drivers free & a new good quality printer cable fairly inexpensive, do not cure your problem, then its probably time to have your PC/System checked for possible problems. The other thing you can try is to actually connect your printer to a different PC/System, then load the correct DRIVERS and connect your printer cable and run some print jobs. If your printer, cable and drivers work ok on a different PC/System, then you pretty much know the problem is normally in your PC/System.#7 Sometimes the Logic Board, built onto/into the printers 'Main PCB/Board', just goes bad, but not very often. As a new PCB costs quite a bit, its better to put that money into a new printer, as the prices have come down so much in the last couple of years.Good Luck! Denny Conway. John: First try running the 'Internal HP Self-Test Pages', directly from your printer with the Printer Cable disconnected.

Turn off your printer and remove the printer cable from your printer and then turn it back on. This clears out any DATA remaining from when your Computer System was connected. TO RUN A SAMPLE PAGE: Press and hold the Resume Button paper button until the printer starts printing, then release the Resume Button. TO RUN A SELF-TEST: Press and hold the Power Button, then press the Resume Button four times and then release the Power Button. TO RUN A DIAGNOSTIC TEST: Press and hold the Power Button, then press the 'X' Button cancel print button eight times, then release the Power Button.

All three tests should print out correctly and both the colors and blacks should look ok. If they do, then I would suggest deinstalling and removing your old Printer Drivers and then going online to HP Company and down loading new drivers. I would recommend that you try loading new Printer Drivers directly from the HP web-site, because the old drivers may have become corrupted and could be causing possible problems. First you should open your 'Control Panel Utility', then open the 'Add/Remove Programs', then under 'Install/Uninstall', highlight and REMOVE any old Printer Drivers that may already be installed. Sometimes the same older drivers can be corrupted and conflict with newer drivers.

After removing your old printers and drivers, go to the HP WEB SITE and download the latest drivers for your printer and system. You can then go to this link: ' ' on the Hp web-site and procede to download the needed printer drivers. When the 'hp customer care' page opens, look under 'get support for your product'; under #1.

Select a task, click-on 'software & driver downloads'; under #2. Enter product number, type-in 'DESKJET 812C' and click-on the blue arrow enter button and then simply follow the directions on each of the following pages, to download the latest printer drivers for your series of HP Printer.If the Internal Self-Test Pages do not print out, or the blacks and colors do not print out or look bad, then you know there is a problem in your printer or with the ink cartridges installed.Good Luck! Denny Conway.P.S. Check for an e-mail from me wityh a couple of tips, just in case your printer is not printing out the ink. John.Follow-up to first reply: Be sure to insert your actual HP Deskjet 940 model number in place of the '812C' model that I forgot to change on the previous info that I sent to you sorry about that.Because you are using refilled ink cartridges, my first guess woild be that the cartridges may have actually gone bad or failed. Ink cartridges were never made to be actually refilled, but the HP cartridges usually can be refilled until eventually the expiration date stamped on the ink cartridge will pass and the cartridge can actuall shut down and not work.

Theres no way to say when that shut down process will actually happen, but its usually around six months or so after the expiration date passes. If you use a magnifiying glass you can usually see that stamped date on each cartridge once you remove them.Denny Conway. Joe: I would recommend that you try running your printer as a 'STAND ALONE PRINTER', not connected to a PC: Unhook the 'printer cable' from the back of the printer. The power cord would still be plugged in to the wall. With paper loaded normally, turn the printer off for 10 seconds, or so. This is done to clear out any remaining DATA/INFORMATION that may still have been in the printers system, from when the PC was previously connected.

Now reach over and turn the printer on as normal. The printer should come on and go to a normal READY CONDITION, with no ERROR LIGHTS on. If you get an ERROR LIGHT on, then you know you have a problem in your printer. If there are no ERROR LIGHTS on, then hold-in on the 'Paper/Resume Button' the button with the picture of a piece of paper next to it for about 3 to 5 seconds, until the LED/LIGHT next to the button starts flashing.

Release the resume/paper button once the light starts flashing. The printer starts to initialize and then it will pull in a piece of paper and print out an 'Internal HP Self-Test Copy', on most HP models. Why is nobody answer the problem of Julie?Quote: Our school's 940c printer won't print. The printer cartridge light is blinking constantly. We installed new printer cartridges.

When you open the printer top, the cartridges move all of way over to the left side of the printer. What does this mean? How can we fix it? We have gone through troubleshooting, unstalled and reinstalled the printer cd rom, we have unplugged the machine, turned it on and off, cleared and deleted print commands, etc.Please let me know as soon as possible.I got the same problem.Let us know! Preston: That normally indicates a failing Printer Cable or corrupted Printer Drivers. GENERAL INFORMATION ON 'JIBBERISH', OR 'COMMUNICATION ERRORS/PROBLEMS': When a printer prints 'jibberish' random symbols and characters, or has communication problems, its usually caused by: #1 a bad parallel printer cable old cable/poor quality cable: not bi-directional printer cable, or not IEEE-1284 rated cable. Inexpensive parallel cables are not usually shielded enough and are not always bi-directional.TECH NOTE: If you are using a USB CABLE, you will usually you have less communication problems caused by a bad or corrupted USB cable, but its possible.#2 bad printer drivers: printer drivers are usually available online from EPSON and HP at no charge; remove/de-install your old printer drivers and then go online and download the newest drivers available for your printer.

If you use your old CD that came with your printer, then your not getting the latest changes/updates available free from Epson or HP. There are more steps involved with correctly installing USB DRIVERS and if not done correctly can cause additional problems. Epson has in-depth information available that I can post if you let me know thru this 'printer repair site'.#3 It's possible that the actual SOFTWARE you are using to do a print job from, may be causing problems Word, Office, Excel, etc. You can try using a different software to print from and see if your problem goes away. If it does, then you may need to have your software removed and reinstalled.

It's possible that something may have corrupted it and is causing problems.#4 Its possible that internal settings on your PC may be not set correctly, but that would normally require a PC trained person to check your system and make changes BIOS settings.#5 Its also possible that a VIRUS can cause problems with printers. Even if you have a virus protection program installed on your PC, it has to be updated regularly to protect against possible new, or modified virus'.#6 If new drivers free & a new good quality printer cable fairly inexpensive, do not cure your problem, then its probably time to have your PC/System checked for possible problems. The other thing you can try is to actually connect your printer to a different PC/System, then load the correct DRIVERS and connect your printer cable and run some print jobs. If your printer, cable and drivers work ok on a different PC/System, then you pretty much know the problem is normally in your PC/System.#7 Sometimes the Logic Board, built onto/into the printers 'Main PCB/Board', just goes bad, but not very often. As a new PCB costs quite a bit, its better to put that money into a new printer, as the prices have come down so much in the last couple of years.Good Luck!

Denny Conway. PrestonIf your printer has failed, buying another HP may seem like a bad idea but some models have a good track record. A search of this site will reveal very few problems associated with the DJ 6122.

It can be had new on eBay at bargain prices and will allow you to recycle the cartridges from your DJ 940. The DJ 6122 uses the 45 black cartridge but will accept the lower capacity 15 cartridge. I do not recommend models that use the low capacity 56 and 57 cartridge set unless you have cash to burn. Avoid the under $100 models regardless of which manufacturer you choose. Lets just face it.

The 940c is a horrible, inferior product that HP will not stand behind or even offer a good support web page as it will tell the world how bad this printer really is. I have owned and tossed two - one I could never fix to keep it from paper jamming and the other would sporatically recognize new cartridges for a while and then say they were out of ink.

Cleaned contacts repeatedly, etc. But in the end only wasted $75 on ink cartridges that the printer would not recognize - yet no mention of this on HP's support site and I know it is a big problem. I wish someone made a good inkjet printer. Kyle: On your HP Printer, when you are replacing the ink cartridges, you are also replacing the print heads, because they are actually part of the cartridge. Its of course possible that you may have an actual Hardware/Parts Failure in your printer, a wrong cartridge, a bad cartridge, an expired cartridge check the age date on the cartridge or the box it came in, or sometimes even that the pull tape was not removed correctly off a new ink cartridge that was recently installed.

Your 940C uses a HP15 #C6615AN black cartridge and a HP78 #C6578AN OR C6578DN color cartridge. The only way to really eliminate a possible bad cartridge even if it happens to be a new cartridge, is to actually replace it, or test it in another printer that uses the same cartridge and was working ok with its own cartridges installed. Unfortunatly, that is usually not practical, unless you know someone that has the same printer or uses the same cartridge in their printer. Its more likely that the electrical contacts on the ink cartridge, or inside the Print Cartridge Holder Assembly, may simply be dirty. Try cleaning all the electrical contacts, carefully and gently, with Distilled Water on Q-Tips or on a lint free rag. With your printer turned on as normal, simply open the Top Cover and the Print Cartridge Holder Assembly will move over to around the center position.

With the print cartridge holder assembly in the approximate center position, simply unplug the power cord from the back or side of the printer. That holder assy will now easily slide back and forth by hand and you can easily remove the cartridges for cleaning. Using damp Q-tips not wet or dripping, gently and carefully wipe off the copper colored electrical plates on the cartridges and the electrical contacts inside the holder assy. Its best to use 'Distilled Water', because it has less chemicals and minerals in it, than tap water and regular tap water can actually cause additional problems. Use new dry Q-Tips to dry off all the electrical contacts after cleaning and prior to reinstalling the ink cartridges.Good Luck! Denny Conway.

Hey everyone,I seem to have the same problem with some of you. I have two HPdeskjets940c and both have the same problem.

They were working fine today and had no problems. Then.I unplugded them while they were still on. Now they both have the cartidge problem. They blink a dark yellow light. I tried cleaning both of the contacts. One stops with the arrow on the black cartidge and the other stops with the problem on the color one.

They have new cartidges in them, like I said they were working fine earlier. I don't know what to do. Kyle: You might want to deinstall and remove your old printer drivers and then go on-line to HP.COM and download the latest drivers. That will eliminate the possibility of corrupted or bad drivers causing a possible problem and printer drivers are free. First you should open your 'Control Panel Utility', then open the 'Add/Remove Programs', then under 'Install/Uninstall', highlight and REMOVE any old Printer Drivers that may already be installed. Sometimes the same older drivers can be corrupted and conflict with newer drivers. After removing your old printers and drivers, go to the HP WEB SITE and download the latest drivers for your printer and system.

You can then go to this link: ' ' on the Hp web-site and procede to download the needed printer drivers. When the 'hp customer care' page opens, look under 'get support for your product'; under #1. Select a task, click-on 'software & driver downloads'; under #2. Enter product number, type-in 'DESKJET 812C' and click-on the blue arrow enter button and then simply follow the directions on each of the following pages, to download the latest printer drivers for your series of HP Printer.If that does not help, then you are simply going to have to eliminate possible problems. Did you actually check the expiration date on the cartridges? Did you actually try a new color ink cartridge?

The chances of an actual bad cartridge are very high. AGAIN: The only way to really eliminate a possible bad cartridge even if it happens to be a new cartridge, is to actually replace it, or test it in another printer that uses the same cartridge and was working ok with its own cartridges installed. If a new color cartridge does not help, then I would guess that you may actually have a Hardware/Parts problem, but no way to really know.Denny Conway. You need to change the setting in printer properties. START/ SETTINGS/ PRINTERS/ Right click on your printer, select PROPERTIES, select PRINT OPTIONS etc make sure you select 'print in colour' or something similar.

If you have XP you can access printers & faxes through CONTROL PANEL. Remember even if you change the setting here you may still need to change it in the programme you are trying to print from. If you are printing from say, paint, Go to FILE/ PRINT, when the window with your printer details comes up check that print properties are set correctly here as well.Good luck?!Dazz UK. My printer was working fine. I tried to print from Quicken and all of the lights started flashing at the same time. I pressed the power button and the lights quit blinking for a minute.

I tried printing from word and all of the lights started blinking. I disconnected and reconnected the cable, restarted the computer and even unplugged everything overnight. As soon as I turned the computer on in the morning, all the lights started blinking again. The carriage is stuck to the right and will not move manually. ConfusedKid,Here's some things to try:Push the cancel job button on the printer, it may be trying to print starting from the middle of something.Open the printer folder and see if there are any extra printers installed, then see if there are any jobs pending for those printers, if you have extra printers installed the wrong one can get set as a default printer, and that will cause printing of funny characters. (start, settings, printers to open folder, or maybe just start, printers and faxes)ST.