Hey Fellas. I came across a Conion TC-555 From a antique mall for 113.00 it fired up dusty,but L-R is Loopy. Left speaker fires up not Right side. if you lightly tap top of box it tires to kick in. Opened it up to find slider looks worn or like its stripped? sprayed de oxit no GO bUT R louder. are these easy fix? thanks will put pics ASAP THIS EVENING!!!