Is this yours or a customer's. Sometimes this is caused by the CPU overheating on the surface. Because a client had left theirs on during a windows update in a bag and it overheated and never turned on again just turn on no display, post or input.
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If data is needed from it you can use a mSata adapter to plug into a desktop computer and hope that it's not bitlocker encrypted.
Is this yours or a customer's. Sometimes this is caused by the CPU overheating on the surface. Because a client had left theirs on during a windows update in a bag and it overheated and never turned on again just turn on no display, post or input.