I recently acquired this beast and got it up and running until the left channel went dead. More importantly, I now have a power (surge) relay problem.. It buzzes all the time, although the amp does power up. The relay is a small open frame type, SPST from the schematic.. The coil on it is not open but the contacts look bad. I could bypass it but I want to keep the amp as stock as possible as I plan on selling it once it is up and running. I am not a certified technician, but can read schematics and check components so if anyone has any ideas let me know.. I know that NTE has replacement relays of the same type or close so a substitute is possible depending on size etc. Cheers Wayne