Taramps MD5000.1 stuck in protect mode

Hi, this is a friends amp Im trying to help diagnose. The amp powers up and fans spin then it shuts down and the protect light comes on the remote. Also, the red light on the amp flashes fast. I opened it up and looked with a magnifying glass. No signs of damage and no smell. Is anyone familiar with this amp and/or problem? Any help would be greatly appreciated. Thanks