HP DeskJet 940

How to Identify and Fix Common Problems ?

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Your printer should have been packaged with a USB cable regardless of whether it is a wireless or wired printer. Plug the cable into your printer and your computer`s USB port. The direct linking should trigger your computer to recognize the printer and start up the software needed to complete the installation.
Above or below the plastic holder containing the cartridges, a sticker indicates what type of ink cartridges your printer uses. The sticker also contains red, yellow and blue circles representing Magenta, Yellow and Cyan colors. If you see the sticker, you have an inkjet printer.
Connecting using a network key or PIN

If your printer doesn`t have WPS, you`ll probably have to enter a `network key` – a series of numbers and letters – into the printer using the function buttons and screen on the printer in order to establish the connection between your printer and router.

HP Smart app (Android, iOS): Open the app, tap your printer, and then tap Printer Information or Network Information to find the IP address. Most printers with a touchscreen display or menu: Open the Wireless Summary or Network Settings menu to find the IP address.
SETUP ink cartridges are used only to set up a new HP printer or printhead and supply ink for the first series of your print jobs. They are specially designed to initialize a printer and calibrate ink levels.
To print in single-cartridge mode, remove one of the ink cartridges, and then continue to print as usual. The printer control panel or computer screen might display a message to install the missing cartridge. To clear the message and continue with the print job, click or press OK.
Download the driver from the HP website to complete the setup with your Windows computer. Turn on the scanner. If your scanner is connected to the computer with a USB cable, disconnect the cable from the scanner. The software installation prompts you to connect the cable if needed.

Relevant Questions and Answers :

the most relevant questions and answers related to your specific issue

HP laser jet 3015 "Upgrade Error Call HP Support"
ANSWER : rgtr

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HP DeskJet 940

HP 26 vs HP 29 cartridge compatibility
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HP DeskJet 940

Cleaning HP 4000 duplexer
ANSWER : I know this is a very old post, but I haven’t been able to find any information regarding how to disassemble this duplexer. The 6 screw’s easy, but how do you “prise” off the left cover? If I do it wrong, I know I will break one or more molded hooks on the cover. Can someone please help?

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HP DeskJet 940

HP 9040 MFP Error code
ANSWER : bonsoir

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HP DeskJet 940

HP PSC 2410 clicking noise problem
ANSWER : I have the same issue… I’ve tried everything above… I don’t believe it’s dust as this happens on and off occasionally… I think I may need to make a youtube video of me “fixing” this printer! I’m really frustrated with this thing!! If it doesn’t work soon, I’m gonna by the solution in the form of a hammer!

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HP DeskJet 940

HP 4101MFP Hard Drive Question
ANSWER : To initialize: turn off – Press start and hold down while turning on, release after all three light light, you should see initialize disk hit check, and allow to boot.

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HP DeskJet 940

HP 4250n – blurry text
ANSWER : What is the fuser? And how can it be changed?

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HP DeskJet 940

HP 4550N formatter board
ANSWER : You can replace it by finding the slot of DIMM, where the existing HP4550N formatter board is installed. More info is available here

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HP DeskJet 940