My ep500 never did work quite right from the time I bought it used. I gave up on using the line-level input, which made lots of noise regardless of any input signal, and now I just use the high-level inputs. So that might be something to try. (Now, the volume on mine is drifting upwards -- I have it set at 0, else it's too loud.)

Last edited by GregLee; 06/02/13 04:27 PM.
Greg
VP180, M80s, M22s, QS8(4), CSW S305s, EP500, Pioneer VSX-90
M2i, M3(2), Pio vsx-1020