MFP M776 initializing hang up

[BasKonst]

Color laserjet Enterprise MFP M776 hangs up in initializing screen endless after changing black toner cartridge. How to continue?

[Alex-TATS]

Hi BasKonst,

Try doing a partial clean first and if that fails a format disk.

Format disk will require to reload the firmware again, so download it in a USB thumbdrive FAT32 formatted.

You can access these procedures by entering the pre-boot menu by touching the screen when the "1/8" appears under the HP logo when you boot the printer.

I hope this helps

[BasKonst]

How to perform a suggested partial clean ?

[Alex-TATS · Accepted solution]

As I said, reboot the printer, when the "1/8" appears under the HP logo, quickly touch the screen. If doing that promptly you will gain access to the pre-boot menu of the printer. 

In there, it's under Administation -> Partial Clean.

Then go back, and select Continue.

Printer will restart again.

[BasKonst]

Problem fixed, thanks.

[Alex-TATS]

If I was helpful, could you please click on the YES button below my answer?

Thanks, and happy that you fixed it at the end.