Musicman trouble shooting has caused hum, and only hum.

[Enzo]

What coupling caps?

[Gaz]

I picked up a couple replacements for the driver transistors and will install them tonight.

About the coupling caps - I suppose I was just thinking ahead: If I solve the hum issue with the transistor replacement, I'm guessing I still have the low volume/distortion issue. If so, I was thinking it was leaky coupling caps, but I don't know how to locate them in a transistor amp. I suppose that I should, and that's why I think it's a stupid question.