Good morning,am trying to fix a hp officejet pro l7780.It can't scan,copy or send fax.Could someone assist me please?

the part that you lift up to copy on the glass or the cover where you put you paper in to scan/copy/fax

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

Sounds like the scanner bulb is burnt out or it's not able to move the scanner sled.
It should be saying "scanner error" as well. (and I think you meant unable to scan, copy or send fax)
No fix unfortunately other than getting a replacement unit (which I believe now is the 8500 premiere)

If you need a replacement, your timing is good, they are $200 off right now, and selling for $299.

Your unit as it stands still makes a good printer and will receive faxes, and you CAN send a fax as long as you do it from the computer.

Look on this link:

http://www.sparepartswarehouse.com/HP,OfficeJet-Pro,L7780,Printer,Parts.aspx

Click on this link or copy and paste the complete link into your browser.

If I could be of further assistance, let me know. If this helps or solves the issue, please rate it and give a testimonial for my response. Thanks, Joe

I’m happy to assist further over the phone at https://www.6ya.com/expert/joe_8b8c2cd6ce148309

I use a VOIP line and get the same error msg. Here's what I do- I dial the fax number with the line unplugged (hence no off-hook message), press "start Fax", and as soon as I hear the fax machine "Click" to pickup the line, I put the line in the machine. Works every time!

the scanner rod have to be lubricated

HP instructions for this operation here. See this article. and this article to change the default settings.
If these settings are correct and you still can't copy from the glass, try a partial reset as outlined here.

I hope this information allows you to resolve this issue. If you need further assistance, please post back with a comment to this thread.
If I've managed to answer your question or solve a problem, please take just a moment to rate this post....thanks!

Click here for online manual and setup guides.
Clcik here to view DSL phone line setup instructions
& here for the general fax menu

I hope this information allows you to resolve this issue. If you need further assistance, please post back with a comment to this thread.
If I've managed to answer your question or solve a problem, please take a moment to kindly rate this post....thanks!

i need drivers and manual

I'm trying to print/fax several pages but the feeder doesn't "grab" the paper--basically nothing happens...BTW, mine is the HP Officejet Pro L7780 All-In-One.