Question about HP Officejet Pro L7780 All-In-One InkJet Printer

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HP Officejet Pro l7780

When you close the lid where the rollers are at, it will not stay closed. Now if you put something heavy on it and it will work fine. I forgot to mention that 2 plastic pieces came out of it as well. I dont know exactly where they go. One is Green and the other one is Black.

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Re: HP Officejet Pro l7780

Most likely the cover latches. Try calling HP support to see if they will sell you new latches. They are pretty bad at selling parts. In the past, I have used velcro strips, that you can buy ay Home Depot or Walmart.

Posted on Aug 09, 2007

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1 Answer

Partial print on incoming fax

Check your incoming line and settings or try to reinstall the drivers. Also, check the user manual for HP Officejet Pro L7780

Jun 25, 2013 | HP Officejet Pro L7780 All-In-One InkJet...

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My HP Officejet Pro L7780 faxes off & on. Motor is running w/in ADF, but the pick assembly does not grab paper

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.

Jan 17, 2013 | HP Officejet Pro L7780 All-In-One InkJet...

1 Answer

Hp officejet pro l7780 all in one printer, Cleaned the pick up roller still not picking up paper

The pick up roller may be worn and in need of replacement. The slight grinding noise is the pickup roller trying to work but slipping

Oct 30, 2012 | HP Printers & Copiers

1 Answer

When making copies, auto document feeder picks up paper and rollers squeal but paper gets stuck on underside. If you lift the lid about an inch the paper will feed through. HP Model L7780

open the top cover, on the very left there is a part that can be removed (running front to back) I believe you will see a scrap of paper iunder there. remove the paper, replace the part and try again

Jan 03, 2011 | HP Officejet Pro L7780 All-In-One InkJet...

1 Answer

The document feeded is not pulling the paper. What should I do? Do you have this part for sale? How much?

Is this happening on TOP Feeder or Actual Paper Tray..

Turn off the printer
Remove the TOP ADF Cover and Clean the Rollers with lint free cloth
Remove the Rear Access door and clean the Rollers

Close the Doors and turn on the printer.

Jun 23, 2010 | HP Officejet Pro L7780 All-In-One InkJet...

1 Answer

I am getting the following error code "00989C98" L7780

Hi this appears to be part of a generic problem possibly caused due to power surges…

As recommended by HP on these types of errors:

1: Disconnect the USB cable from the back of the product, but leave the product turned on.
2. Open the cover of the product and remove the print cartridges.
3. Close the cover and wait for the Insert Ink Cartridges message to display.
4. Disconnect the power cord from the back of the product and wait for one minute.
5. Reconnect the power cord. If the product does not automatically turn on, press the Power button.
6. Open the cover and reinsert the print cartridges.
7. Close the cover. If prompted, print a calibration page.
8. Reconnect the USB cable, and try to print a print job from the computer.

If this works, please grade the answer... If the steps don’t work I would recommend you check with HP.

(the steps highlighted above are from the support website from HP)


Nov 07, 2009 | HP Officejet Pro L7780 All-In-One InkJet...

1 Answer

The auto-document feeder on our HP L7780 OfficeJet Pro printer doesn't pick up the papers anymore. The 'gears' are spinning, but the papers aren't advancing. I've cleaned the rollers, but that still didn't...

I put an elastic band around the black roller as it doesnt seem big enough and it works nearly every time now. Have done this with another L7780 Pro as well which fixed it completely on that one.

Jun 09, 2009 | HP Officejet Pro L7780 All-In-One InkJet...

1 Answer

Error: rear access panel open, but it's not and now it won't print. Help!

Check VERY closely edges, rollers etc, you likely have a small shard of paper mucking up the works.

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May 26, 2009 | HP Officejet Pro L7780 All-In-One InkJet...

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