I though about that, I did go over the PCB Trace with a fine tooth, and I did not see any problems there. The amp has low hours on it as it has been sitting for many years prior to being used. I do think that a re-cap is in order, but the funny thing is that I powered it up this morning and watched the amp. Just the amp was powered up. after about 10 mins or so I started to hear the little static in the right channel, the closest way to explain it is more like a a tiny popping noise. When it does it you can see the bias light flicker in unisance with the static/popping. You can only hear it when you stop playing music, it is quite low.
Any thoughts.