Be sure to discharge the big capacitors and handle it with one hand. I may be mistaken, but that looks like where the transformer bridges from the AC side to DC side. It will have very high voltage there. If that's exposed wire in the pic then it is likely indicating a problem. The end of one wire looks yellowish too, as if it may have been hot. All of your symptoms point to a bad power supply. About 70% of the time I see these it's the Power Supply, so I'd definitely put my money there.