Vintage Synth Explorer Forums

Hey all, about to take my mono/poly in, but thought I’d see if anyone here knows the problem. Just bought a few weeks ago. Worked perfect. Turned it off one night, the next day wouldn’t make any sound. All LEDs work fine. There is a very faint hiss noise that happens when I press a key. I can hear in headphones and output. I’ve done all the standard stuff- returned to zero, checked cables, etc. Help!!!

Thank you!