Boss DD-3 constant feedback problem

[yeeshkul]

After years of flawless service, my Boss DD-3 has recently started making troubles - it gives an ugly, endless feedback at all FB knob positions. The pot itself is all right. The feedback sound different than before and it can't be stopped. Anyone would help me where to look?

[slacker]

I would check the solder joints on the pot, if the anticlockwise lug wasn't connected properly that could lead to constant feedback. Also check the wires and connections from the pot board to the main board.