I have the same amp, much the same story - it's been a solid amp for 20 years. Recently, the left channel has started dropping out intermittenly, with only a small amount of power delivered on the left when this happens. Switching amp to mono cures it. Problem is more evident with a lower level input such as 4125 tuner, as opposed to a CD/DVD input. Visual inspection shows no obvious problems, cracked solder, etc. This is the first I've heard of dried up caps - are they likely to be the culprit in my case also? ps: I notice you're local to Victoria, BC. Any recommendations on where to find caps in Victoria?