MX-B557P white screen / no boot

[boutn]

We have an MX-B557P in the shop that does not boot.

We only get a white screen, no network, no fans, no nothing.

Trying to boot with
2+7+8
2+6
3+4+6
6+7
3+6
does not work, still white screen.

Power supply has been swapped.

Only 2 leds come on on the main board.

Also, the led below the X button flashes red/blue

Sharp has never heard of this...as usual.

Oh, and we swapped the mainboard last august which made it work for a couple of months untill now.

Anyone?

[DCStech]

The Lexmark version is the Lexmark M5255. I am not sure if referencing forums on the Lexmark version may help you. From what I can tell, the flashing blue means it is trying to process data, and the flashing red means requires user intervention. Outside of making sure there is nothing stuck in the printers que, I would verify the power at the outlet.

[boutn]

The Lexmark version is the Lexmark M5255. I am not sure if referencing forums on the Lexmark version may help you. From what I can tell, the flashing blue means it is trying to process data, and the flashing red means requires user intervention. Outside of making sure there is nothing stuck in the printers que, I would verify the power at the outlet.

printer is in our shop
no network is connected
power outlet / power cable has been tested / swapped