hey all, I'm a newcomer with some much needed advice.

I've had this Crate GX 212 since i was a teen and don't want to part with it due to these issues so i'd rather repair them if i can myself!

major issue is a loud humming when in overdrive, either channel.
also a loud pop when i turn it off.

now ive read a lot of threads dealing with pop and nobody seems to know what the hell they're talking about, if you do please help!

thanks,
Adam