jbsmooth

Hello friends I have the Flextone I 60 watt model. I've owned this one for a couple of years and has worked with no issues until recently. When I switch from manual to one of the banks it distorts on all the banks. If I play it on manual it works fine it's only when I try to access the banks either manually or with or the FB4 pedal. The save light stays on. Has anybody else experienced this problem and what can be done to solve it. Thanks in advance