Hey guys....I just found a NAD 2200 Power Envelope in the trash the other day and at first it appeared to only have a blow fuse. So i replaced this fuse and it worked fine for a few minutes...but then one of the channels went off and the other one a bit later. I noticed that when i tapped the two relays near the input/output jacks in the rear, it would begin playing and then stopped within a second or just crackle when i tapped it. Also, when the amp is turned off, the speakers make an extremely loud pop. I am not much of a pro on audio but this amp sounded great when it first worked and i would like to get it working again. I was told by one person that I would just need to replace the relays w/ some simular audio quality ones. I have soldering skills so that's no problem, but i dont want to put out the money without knowing if something else could also be the problem. If it is the relays then which relays would be the best and where can i get them? Thanks