will not talk to my android

⟐ Commented April 02, 2026 at 2:17 MST

I bought the HP OfficeJet Pro 8620 printer in 2015 and up until december 2019 it has worked perfectly. One day out of the blue, I recieved this error message: “The printhead appears to be missing, not detected, or incorrectly installed. Error code 0xc19a0023" . I reseated the printhead one time and the printer worked until next day, when the same error appeared. I followed HP’s troubleshooting steps 1. reset printer 2. reseat printhead 3 times 3. updating firmware, but no luck. I’ve disassembled the printhead and cleaned the contacts on PC board. I ordered this cleaning solution and cleaned the printhead, both soaking in the solution for some time and pushing the solution through. No luck. I then went on to buy this new print head from eBay, but the new one instantly gave the same error message.

Then I continued to troubleshoot some more. Since the new printhead failed I thought maybe the problem is in the printhead carriage inside the printer. I disassembled it and cleaned the contacts on the PC board. (This one is also possible to buy on aliexpress , but I’ve not done it). Everything looks ok. All the pins are undamaged. I’ve reset the CMOS battery on the main board, disconnected all cables and checked the cables specificly for the printhead carriage. I don’t have the equipment or knowledge to test if the cables actually work, but everything looks ok. Still getting the error message.

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). 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? I’m a bit hesitant to invest more on this printer since I already blew up 72 EUR for the printhead…. Returning the printhead to China from where I live costs almost 40 EUR so it’s not worth the refund.

EDIT: 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. However they explicitly say it’s only connected to a cartridge error message. Other error messages are not related. So in theory I’ve already solved this issue, when I updated my printer to the newest firmware early in the troubleshooting process. Both printheads give the same error message. This decreses my belief in buying new original ink to fix the problem…

EDIT 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 didn’t. So now I don’t have to waste money on buying new ink at least…

Or am I missing something else? Thanks for helping out!

⟐ Commented April 01, 2026 at 5:39 MST

⟐ Answered March 16, 2026 at 18:37 MST

⟐ Answered February 18, 2026 at 18:12 MST

⟐ Commented February 12, 2026 at 22:06 MST

⟐ Answered January 05, 2026 at 13:41 MST

I have unplugged the machine, removed the ink carrage and cartriges, does not help.

Any suggestions?

Dave

⟐ Commented December 28, 2025 at 11:49 MST

and then the error message occurs.I have had this issue before but never as bad as this time. It just wont work. Any help would be appreciated. I was thinking of carrying to a repair shop. Probably an easy fix for them but how much would that cost do people reckon?

⟐ Edited by author December 27, 2025 at 15:03 MST

⟐ Answered December 03, 2025 at 23:14 MST

Here is other messages that shows on the printer

1. Ink Cartridge(s) Problem The following Ink Cartridges must be replaced. I have brand new ink cartridges.

2. It was printing about 2 weeks ago, when I replaced the empty ink cartridge. Then, it stopped. I called HP and they sent another one. Now, it will not accept the new cartridge. 

3. I have downloaded print drivers from HP.com and I have uninstalled and reinstalled the printer software about 4x.

⟐ Commented November 23, 2025 at 17:28 MST

⟐ Edited by author November 19, 2025 at 3:35 MST

⟐ Commented November 02, 2025 at 17:33 MST

⟐ Answer edited September 03, 2025 at 19:34 MST

⟐ Answered July 11, 2025 at 9:14 MST

1. Does anyone know of a source for the replacement part?
2. How do I remove the ink absorber?
3. Can the ink absorber be refurbished?

⟐ Answer edited July 04, 2025 at 19:32 MST

I am searching for an other belt and a video how to remove the old one

⟐ Edited by author June 26, 2025 at 7:20 MST

⟐ Answered June 07, 2025 at 18:17 MST

⟐ Answered April 11, 2025 at 3:05 MST

⟐ Commented April 11, 2025 at 3:02 MST