#Hp officejet pro 8720 troubleshooting update
#Hp officejet pro 8720 troubleshooting Pc

For the next print job it brought back the 'missing printhead' error, but on a third try it printed again normally. Strangely, the printhead came back to life. I connected the power cord directly to the WALL outlet instead of connecting to good old 'surge protection' bar. Did the old reset printer/reseat printhead routine suggested by HP support, but this time did something differently.

I decided to revisit the problem before buying a new printer. Or am I missing something else? Thanks for helping out! So now I donвЂ™t have to waste money on buying new ink at leastвЂ¦ This decreses my belief in buying new original ink to fix the problemвЂ¦Д®DIT 2: I found the old original HP empty cartridges I had before and installed them just to see if it would remove the error, but it didnвЂ™t. Both printheads give the same error message. So in theory IвЂ™ve already solved this issue, when I updated my printer to the newest firmware early in the troubleshooting process. However they explicitly say itвЂ™s only connected to a cartridge error message.

#Hp officejet pro 8720 troubleshooting update

Returning the printhead to China from where I live costs almost 40 EUR so itвЂ™s not worth the refund.Д®DIT: I found an official statement from HP about a new firmware update removing Dynamic Security Feature which makes the printer fail when unoriginal ink is installed. Could it really be the problem? Is it still worth a try to buy new original HP cartridges and will it even fix the problem? Or is the damage done already and not reversable? IвЂ™m a bit hesitant to invest more on this printer since I already blew up 72 EUR for the printheadвЂ¦.

One last thing that I came by today on this page is that it might be the unoriginal ink that I installed for the first time last time I replaced my cartridges (about 3 months ago, I switched the last color from original HP to unoriginal). I donвЂ™t have the equipment or knowledge to test if the cables actually work, but everything looks ok. IвЂ™ve reset the CMOS battery on the main board, disconnected all cables and checked the cables specificly for the printhead carriage. (This one is also possible to buy on aliexpress, but IвЂ™ve not done it).

#Hp officejet pro 8720 troubleshooting Pc

I disassembled it and cleaned the contacts on the PC board. Since the new printhead failed I thought maybe the problem is in the printhead carriage inside the printer. Then I continued to troubleshoot some more. I then went on to buy this new print head from eBay, but the new one instantly gave the same error message. I ordered this cleaning solution and cleaned the printhead, both soaking in the solution for some time and pushing the solution through. IвЂ™ve disassembled the printhead and cleaned the contacts on PC board. I reseated the printhead one time and the printer worked until next day, when the same error appeared. One day out of the blue, I recieved this error message: вЂњThe printhead appears to be missing, not detected, or incorrectly installed. I bought the HP OfficeJet Pro 8620 printer in 2015 and up until december 2019 it has worked perfectly. IвЂ™ve read through most of the other threads on the internet about this problem, but IвЂ™m still creating this one both for documentation purposes, and in case someone has a solution that IвЂ™ve not thought of! Text in bold are considered important for the troubleshooting.