820-4924-A Restarts with corrupt graphics.

[TBFix]

No sign of spillage on the board. I tried pram/Smc reset several times. After running Unigine valley it reboots and screen is garbled see pic. What is the most likely culprit or where to test first?.

 

[2informaticos]

Should be RAM, or CPU.
Did you check external video?
If restarts, shouldn't be an internal LCD issue however.

Run a memory test...