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Help Troubleshooting Amp?

Started by portableanswers, September 23, 2015, 11:43:04 PM

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portableanswers

Hello, new here. Not sure if this is a repair/help forum but I do need some help.
My Peavey KB60 amp has 4 inputs: 2 highs and 2 lows.
The lows work great but when I plug into the highs I get feedback and squealing.
Opened it up and inspected the inputs, solder seemed good and didn't see anything out of the ordinary.
Odds are that both highs wouldn't be broken so I'm wondering if it may
have something to the board. Any suggestions? Thanks. 

Enzo

WHAT are you plugging into the high gain jacks that makes it squeal?  If it is an instrument, turn its own volume control to zero.  Does the squealing stop?  For things with pickups, like guitars and basses, does it matter how far away you stand?  or does it matter if you turn to the side?  (In other words does aiming the guitar change anything)

Iif you plug nothing into the jacks, turn up the gains all the way, does it then squeal?