There's no easy way to diagnose motherboard or CPU problems without a bunch of fancy lab equipment (and lots of time), so usually, it's done by direct replacement.
If you've done what I suggested above and it hasn't helped, about the only thing you can do is to try direct replacement. If you take it to some computer repair place, they most likely will have the parts, but it will cost a bunch to get it fixed.
One last suggestion I could make would be to remove/inspect the APU's cooler and replace the heatsink compound and make sure it is properly seated on the chip when you re-install it. .
QuakerMember Since 21 Aug 2009
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