I hadn't played my metal muff for a while, so i plugged it in. and it didnt work. so i open up the back change the battery. still doesnt work. I open up the back again and take a closer look, i think i burnt something, bc there was some ash inside it near the AV input

here's the pic

My Gear

Epiphone Les Paul Standard
Epiphone Elitist Paul Mccartney Texan
Orange Tiny Terror
Vox Valvetronix AD 30
Vox V847 Wah
Metal Muff EQ (broken )
Boss RC-2 Loop pedal

Me playing