>From time to time I need to repair a Linux  embedded device that is totall=
y dead.
All voltages are correct on mainboard but yet, the device does not start.

So, I think 3 reasons are possible

1.Faulty CPU
2.Faulty BIOS
3.Faulty PCB

How( what pins )  to measure to know it is No.1 or No. 2. or No. 3?
Any suggestion?
Thanks

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