Also squirt some cleaner into the footswitch jack and probe a plug in and out of it a few times. That jack could be involved in your channel switching problems.
Your problem is probably not a bad partt, more like a bad connection.
Next time this happens, ball up your fist and whack the top of hte amp. If the amp reacts, something is loose.
Your problem is probably not a bad partt, more like a bad connection.
Next time this happens, ball up your fist and whack the top of hte amp. If the amp reacts, something is loose.