Switches tend to go bad but you'll hear that when you switch......... Usually the symptoms are crackling or in and out fading of the sound
I would check the red wire + tape. Else, try with a multimeter if the unit gets 9V.
Tijd zat..., toch?
"Berarduur, the self sufficient guitar maan"
"He's Barardurr; he just does"
Technophobia; Analog Audio Solutions; for all your custom builds and mods.