RT. It was totally my fault. The bulbs on the meters are all dead. The last couple burned out a couple months ago. The amp has no other indicator lamps so I thought it was turned off and pulled the patch cords that go from the pre outs to the amps in. Apparently that was a really bad idea!
I did that once with a Mac 2500 and a pair of XR 16s. Blew one woofer cone right out of the basket-wires were shredded and there was no way it was being rebuilt. I was able to locate an original replacement, but learned an expensive lesson.