I have a Model 990 I bought fom Outlaw that I have controling a used 755 - neither came with a dc trigger cable.

1. First, I bought a generic cable from Radioshack with a 1/8 stereo plug at each end. When I plug it in, the amp wouldn't power the speakers until I removed the cable - though the green light was on.

2. Next, I went back to Radioshack and bought a mono version of the same cable. The amp now works when the cable is plugged in.

BUT...

3. The 755 never seems to turn off. The green light stays on the entire time, and there is never a click sound like the amp is turning off. The cable is plugged in correctly, and I can't imagine what the problem is.

Is this normal???? If not, what am I doing wrong???