If the fan spin very loud, that is a sign of overheating, if you're able to run of 5 mins before it turn YLOD. [br]
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If that is the case, can consider trying syscon code, if its 1200 error code that is clear its an simple overheating. All u need to do is to replace the thermal paste, if that dont fix. Then u will have to do a delid which is to remove the ihs and put new thermal paste for it and put back everything then run it.