Hi there, I have aquired a Kenwood KR 7600 from a local yard sale. Was told it was untested, but it's a great looking amp and for $30 I figured it was worth a gamble. Brought it home and of course, it powers on and all lights turn on but the protection relay wont click. I measured DC Offset and it climbs from 0 to 200mv and drops back to 0 and repeats. On both the left and right channels. Does anyone know what can cause this, or have tips in what to look for? Any insight would be greatly appreciated! I would love to hear this baby make sound.