20 Most Recent HP Officejet Pro L7780 All-In-One InkJet Printer Questions & Answers

I figured out the problem with my printer. If none of your ink cartridges are detected (missing) then follow the install steps below. 1. Turn on printer 2. After printer declares cartridges missing open the printer and remove the cartridges (advise putting a piece of paper under the cartridges to catch any ink that spills). 3. Turn off the printer (keep the top of the printer open) 4. Turn on the printer (still with the top of the printer open) 5. After the printer declares the cartridges missing again install the cartridges (while the printer is powered on). Close the top of the printer. 6. The printer should begin to cycle the ink into the printer and back out to the ink reservoirs. 7. After the ink cycle the printer should display genuine ink cartridges are installed 8. Make sure paper is in the tray so the printer can perform an alignment. 9. Everything should be ok after that. Chad

Raja Ahkter is definitely a AI Bot. There was an answer from him earlier for a Washing machine where here suggested checking the 'Compressor', (thinks it is a fridge) and then a bit further on in the same answer suggested also checking the Inlet and Exhaust valves (thinks it is a car)! I delete his answers, but the bot picks them back up and answers again. You contact the sender of an answer by clicking Comment under their Answer. They will get a Notification via email and on the site. It will depend though whether is was an old answer or a new one? Many of our historical Experts have passed away. As stated, if you wanted an answer from and HP specialist, go to www.justanswer.com You only pay if you are satisfied with the answer but it will come from an HP Engineer.

There should be a textured seperator pad, if that's worn out, replace it. Also check the ADF rollers should not be smooth. You may need to just replaced the ADF maintenance kit. It should include the roller assembly and seperator pad.

Try performing a reset on the device. Unplug the power cable, then hold # and 3 while powering it back up.

Blue is made from magenta (pink) and cyan ( sky blue), if your blues are coming out pink then they are missing the cyan component. In your machine this could be caused by a blockage in the printhead, the cyan cartridge being empty, an electronics fault, a boma pump fault (the squishy black thing on the base of the cartridge). Check your cartridge first - if it feels lighter than the other it is probably empty. Sometimes there is a fault where the entire contents of a cartridge (usually the cyan) can be emptied in a matter of days or less. If the cartridge is unusually empty compared to the other colours - refer it to HP.

You may want to try the clean the printhead:

1. Press the Setup button.
2. Select Tools.
3. Select Clean Printhead.

Beth, Any details on what firmware version worked for you. Have a WRT54GS V7 -- and having same darn issue!! - Jen

Please follow the below steps.
STEP 1.
1. Un plug the power chord from the back of the printer.
2. Press and hold the power button of the printer.Wait for 30 seconds.
3. While holding the power button, re-plug the power cable.
4. Turn on the printer, if it is not on.
STEP 2.
1. Unplug the power cable from printer when the printer is powered on and wait for 20 seconds.

2. Then, press and hold # and 6 while plugging in the power cord.

Continue holding until it displays Semi Full Reset message in the front panel of the All-in-One.

Re-install the software for your printer. Download the drivers from the HP website and use the most current drivers for your product. Also, check disk needs to be run on your unit to verify there are not other issues with your OS(Operating System). Given the types of codes you have provided, it looks like you are running a Windows OS. To run the check disk option, press and hold down the Windows Insignia key +S. This will bring up the Windows search option. Type "command prompt" and there should be a secondary window that shows you the results of your search. Look for the Command Prompt option and right-click the option and select "Run as Administrator" by highlighting the option and then left clicking your mouse. A black window will come up with a variation of,"C:\Windows\System32\"; at this prompt you will see a blinking line\cursor. Type "chkdsk /r" then press enter. A report will come back stating that chkdsk cannot be run on "mounted" volume. Do you want chkdsk to run the next time the computer is restarted? Y\N Press Y then enter. Close the command prompt window and restart your PC. *WHEN IT RESTARTS, IT WILL TELL YOU TO SKIP CHECK DISK WITHIN X AMT OF SECONDS... DON'T TOUCH ANYTHING!!!* Once it has completed, it will boot into Windows normally and if there are any issues, it will tell you during the scanning process. Hope this helps. If not, then bring up google.com and download and run this: Downloads AdwCleaner ToolsLib This may also help.

the arm in the printer is a cog setting you may have inadvertently knocked it out of alignment, it has free movement on a pivot and spring but when the printer uses it, it pushes on the mechanism to grip the paper and the roller at the bottom freeds it though, sometimes using to thick paper can do the samething. you would need to open up the device and locate the mechanisms, and make sure there is noting in the way of the controller's, i've seen a tiny piece of silver rapper make the same problem.

Hate to say it, but it means "Don't buy HP printers". You'll be a whole lot happier with Canon or Epson. I had no end of trouble with more than HP all-in-one. They just get flaky after awhile, and the software (particularly scanning) is terrible.

Uninstall completely all of the software that came with unit and then reinstall it. And HP customer service sucks - they will only help you out during the warranty period of their product.

If you subscribe to a caller ID service through your phone provider, you can block
specific fax numbers so the device does not print faxes received from those numbers.
When an incoming fax call is received, the device compares the number to the list of
junk fax numbers to determine if the call should be blocked. If the number matches a
number in the blocked fax numbers list, the fax is not printed.
Set the junk fax mode
By default, Block Junk Fax mode is turned On. If you do not subscribe to a caller ID
service through your phone provider, or do not want to use this feature, you can turn
off this setting.
To set the junk fax mode
▲ Some models have a Block Junk Fax button. Depending on the model you have,
do one of the following:
• Block Junk Fax button: Press the Junk Fax Blocker button, select the Block
Junk Fax option, and then select On or Off.
• Color display menu: Press Setup, select Basic Fax Menu, select Junk Fax
Blocker Setup, select Block Junk Fax, and then select On or Off.
Add numbers to the junk fax list
There are two ways to add a number to your junk list. You can select numbers from
your caller ID history, or you can enter new numbers. The numbers in your junk list are
blocked if Block Junk Fax mode is set to On.