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I have the same problem. Blinking lights, shutting starting up endlessly in short cycles, usb doesn’t start etc..

Black screen.

Before this all happened I got a brief message with error code 502, meaning the bios is corrupt. After that no messages, just that black screen. So I guess that replacing the bios chip will do the job. But where is that chip situated on the motherboard? Does anyone know? 

 

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