820-3462-A randomly power off

Hello

I have A1425 and power off randomly one day working without any problem then shutdown machine by user 2 hour later cant open when OS loading or login screen power off.

Machine not have serial ( user said apple changed board in warranty but i m not sure) ASD gives this error;

Any idea where can i start?
 

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Yes when machine start normally airport is working. ( When i didn't connect I/O board,hard drive,battery also continue same problem)
 

dukefawks

Administrator
The missing sensor should also not cause the board to shut down. Any signs of liquid damage or was it dropped? Does it still shut down with IO board disconnected?
 
Customer said nothing happen but as you know users newer drops and liquid damage:) Not signs of liquid and case defective.. when i disconnect I/O board problem is continue.
 

dukefawks

Administrator
I honestly have no idea. Have you disconnected everything including trackpad and keyboard? Fan will run on full but it should not shut down.
 
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