On top volume & top drive with nothing plugged in it feedback
On full volume and full drive with nothing plugged in not even footswitch or guitar it has high frequency feed back when on full is this a problem on Friday i was playing it on 7 volume full (more) drive setting mid, mid and bass treb on 4 for about 3 mins with 2 guitars playin though it
Music - Fender - Hot Rod Deluxe Guitar Combo Amplifier
Answers & Comments
You should check if the thing does it with a guitar plugged in.
The shorting switch for input connectors that keeps the input grounded are prone to failure.