Thermal overload is an easy fix.  It's either a loose cooler head (tiltled or insufficient pressure) or somehow not enough thermal compound.  Get a tube of Arctic Silver, Noctua, or Xigamatek.  Unscrew the 4 phillips cooler head screws (don't lose the washers!) and then re-apply a very small amount of paste (a grain of rice sized amount) right in the center.  Reinstall the cooler head, and tighten the screws evenly on each corner until the bottom out.  They should stop, if they keep turning, you haven't tightened them fully yet.

This should fix your thermal overload.   This will also usually fix a device with one or two hot dies on a side.

-Phil