HP Officejet Pro L7780 powers up but no longer functions

[MarinWebPro]

Printer powers up but none of the function keys work nor is it recognized on the wireless router.  I am running Win7 ... is there a fix or has this printer bitten the big one?

[Jeet_singh]

Hi @MarinWebPro,

Welcome to HP Forums, 

this is a great place to get support, find answers and tips,

Thank you for posting your query, I'll be more than glad to help you out 🙂

As I understand you are having some issues with your HP OfficeJet Pro L7780 printer. Don't worry we'll work together to resolve this concern,

Let's start off by performing a hard reset on the printer and do make sure the printer is connected directly to the wall outlet.

* With the printer turned on, disconnect the power cord from the rear of the printer and also unplug the power cord from the wall outlet.

* Remove USB cable, if present.

* Wait for 2-3 minutes, press and hold the power button on your printer for about 30 seconds to remove any additional charge.

* Now plug back the power cable straight to a wall outlet without any surge protector or an extension cord and then plug back the power cord to the printer.

* Turn on the printer and wait till warm-up period finishes and the printer is idle.

Next thing, I would suggest you try and make a “photocopy” to determine whether the issue is with the printer or not. Place a document on the scanner glass and choose “Copy” option. If the printer is making a good copy, then the printer hardware is fine.

For more assistance, please follow the steps listed in the support document: Click here

Let me know if those steps worked for you.  

If they did, that's awesome!  

Give us some reinforcement by clicking the solution and kudos buttons, 

that'll help us and others see that we've got the answers!

Good Luck

Thanks & Regards,

[MarinWebPro]

Hi, and thank you for responding to my issue ... I followed your instructions but to no avail, I still couldn't get any of the function keys on printer to work.  I was, however, able to establish a USB connection to my desktop and print.  I then proceeded to update the firmware, per the link that you provided, here again, to no avail.  I still unable to get the function keys to work, nor is my wireless router detecting the printer.

I have reconnected the printer to my desktop via the USB cable so that at least I can print from the desktop.  Any other suggestions?

[DavidSMP]

Hi @MarinWebPro,

I read your quick response. Brilliant troubleshooting!:) Kudos to you for that. 🙂 I’ll be glad to assist you with this. 🙂

Then visit the links mentioned below for further assistance.

Please change the USB installation to a wireless one from this  link: http://support.hp.com/us-en/document/c03418489

Please check this links out also: http://www8.hp.com/in/en/campaigns/wireless-printing-center/reconfiguring-system-help2.html

You could also check this link out also: http://support.hp.com/us-en/product/HP-Officejet-Pro-L7000-All-in-One-Printer-series/3601421/model/2...

I am giving you this information because the printer may have a hardware issue and the function keys may not be working. Hence I am giving you a work around. 🙂 Trust me I’ve done all I can to help, by keeping your best interest in mind.

Hope this helps. Let me know how this goes. I genuinely hope the issue gets resolved without hassles and the unit works great. Please reach out for any issues and I'll be there to assist you .:)

To simply say thanks, please click the "Thumbs Up" button to give me a Kudos to appreciate my efforts to help. If this helps, please mark this as “Accepted Solution” as it will help several others with the same issue to get it resolved without hassles.  🙂

Take care now and have a splendid week ahead. 🙂

Happy holidays to you and your family:)  Take care.:)

[MarinWebPro]

Thanks for the quick response ... I was stopped dead in my tracks at about step 3 ... I have three HP printers, the one that comes up when I go to the folder HP is an 8600 which is working fine on a wireless connection ... I do not see the L7700 in the programs folders.  Also checked out the other two links that you sent, one had more or less the same procedure and the other required the use of the control panel on the printer, which, as stated previously, is not responding.

[DavidSMP · Accepted solution]

Hi @MarinWebPro,

Superb troubleshooting and kudos to you. :)I've done everything possible to assist you by keeping your best interest in mind. 🙂 I thank you for your speedy response. 

It is a hardware issue with the printer and you need to contact HP phone support to get the unit replaced.

Please contact HP phone support from this link: http://hp.com/contacthp Please select the country and type the product# of the unit. Then please follow the on-screen instructions to contact HP phone support. Please note that if the unit is under warranty, then the manufacturer's warranty should ideally take care of the situation.

Link to check if the unit is under warranty: http://support.hp.com/gb-en/checkwarranty/  

To simply say thanks, please click the "Thumbs Up"button to give me a Kudos to appreciate my efforts to help. If this helps, please mark this as “Accepted Solution” as it will help several others with the same issue to get it resolved without hassles.  🙂

Take care now and have a splendid week ahead. 🙂

Happy holidays to you and your family:)  Take care.:)

[DavidSMP]

HiMarinWebPro,

I thank you for your speedy response. I also thank you for accepting this as a solution. I genuinely hope the issue gets resolved without hassles. You've been awesome to work with. 🙂

Take care now, stay healthy, keep smiling big and do have blessed year ahead.:)

To simply say thanks, please click the "Thumbs Up"button to give me a Kudos to appreciate my efforts to help.