After firmware update error: Communication Lost (device <--> control panel..)

[DanielvdW]

Hello community / support team, after a correct firmware upgrade to via Webinterface:

FutureSmart Bundle Version 4.6.0.1 - HP LaserJet Enterprise 500 Color MFP M575 FIRMWARE

2406048_029634 154.6 MB May 10, 2018

The printer prompts this error: Communication Lost (device <--> control panel..)

ErrorIs there any way to reflash or solve this issue?

I Already tested:

Pre-Boot walk-up USB thumb drive: (control panel Pre-Boot menu)

I do See the HP logo, but pressing it on the display does not bring up the 1/8 as per PDF instruction:  https://ftp.hp.com/pub/softlib/software13/printers/readme_cljM575_fs4_fw_2406048_029634.pdf&page=17 

"Press the HP logo in the middle of the screen when you see the “1/8” under the logo. "

Thanks in advance, Daniel

[IronBadger]

That error indicates that the control panel is no longer talking to the formatter.  I do not know why a FW update would affect this as it is a physical USB connection.

Here is a document on removing/replacing the control panel.

You can follow that and try reseating the cables.

Here is a document on replacing memory.  It is the easiest one I could find on exposing the formatter.  Open the cover and re-seat all of those cables.

This is where I would start.

[Oskar1990]

Hello,

I have the same error. My machine is HP LJ 700 color MFP M775. I update firmware from 2013 version to newest 4.9.0.1 from here: https://support.hp.com/us-en/drivers/selfservice/swdetails/hp-laserjet-enterprise-700-color-mfp-m775...

I have tried to unplug and plug again both control panel and memory card. Do you have any next suggestion or some fix?