I originally grounded pin 5 of the PA3004 to the frame. Per your suggestion, I grounded pin 5 of the IC to pin 7 of the IC after removing the AC source from pin 1 of the protection board. It made no difference. I may have mentioned this before, but removing the AC source from pin 1 of the protection board causes the relay "on" time to be slightly reduced from an already-brief amount of time. I'll check out the power amps as you suggested, but would they still affect the operation of the protection relay when I have them disconnected from the protection board? Right now, I still have Q1 removed (per Mark's suggestion) and I also have wires disconnected from pins 4,5,6,7 & 8 of the protection board.