Jeff Rowland 112 Won't Turn On

A buddy of mine has a Jeff Rowland 112 that does nothing when you push the power button. The breakers don't appear to be tripped (if they are, they don't reset or move at all when pushed) and there definitely is power to the unit at the amp end of the power cord. Any ideas as to what the problem may be? Is there an internal fuse or breaker before the ones accessible on the back of the unit? It most likely was a power spike that initiated the problem. He's in Mexico where there are no reliable service centers to take it to hence asking online for help.