After pulling this thing out of storage and firing it up, I've found a few issues that I'd love some help with. #1: When first powering the amp on, the source indicator and pilot/power lamps flicker, along with an electrical crackling noise coming from the power transformer. After some time (30 seconds to 2 minutes), it will stabilize and the speaker relay will click on. I've used deoxit and a q-tip on the power switch contacts with no real improvement. At this point, I'm thinking it may be the large power supply caps failing. I have ordered some Nichicon golds to replace them. Any thoughts? Am I on the right track with cap replacement? #2 I get an intermittent pop from the right channel while listening, that does increase with volume. It is present on all inputs, regardless of anything being connected. DC offset is around 6mV on the left channel, but the right fluctuates wildly, around 35-45mV with spikes up to 70mV. Is this a transistor issue?