That receiver is designed to handle 8 and 4 ohm loads and it actually bench tests at 88w/channel with all channels driven through the entire frequency range. Who knows, maybe that is still not enough...maybe not at that volume level when a demanding dynamic (such as an explosion on a DVD) is encountered.

I can't help but wonder if the power supply is faulty or maybe there is a bad transistor.

Any T752 owners out there?