The voltage on the +5V line is 4.8 volts which I don't think should be a problem. I get weird behavior with the aux power input. The standyby LED flashes rapidly and the IR transceiver LED glows a visible deep red. Since that doesn't sound like something that should be happening, I have not tried that again. I have checked and the regulators work fine outputing 5 and 3.3 volts respectively. I had the jumpers moved to the lower position which puts the regulator outputs in circuit. I do not know what the proper power up sequence is for the aux power supply or if the flashing I was seeing would go away when the Empeg is turned on, but without some input from Patrick or MarkM on how the aux input works, I think I will stay away from it for now.

Stu