820-00850 (95 laptops all same problem) Powers on but no display

[KC Micro Tronix]

I have 100 of these laptops that showed up at my door.
They appear to power on and pull current and charge the battery.

No display.
Power rails are present.
I was unable to get them into DFU.

Ideas?

 

[2informaticos]

Did you test USB activity and external video?

Which voltages do you get on the board?
If machine turns on, all AWAKE and SLPS2R voltages should be present; so should enter to DFU.

 

[KC Micro Tronix]

we got them in DFU. Force resetting them and rocking them out.