Some of my son's friends were goofing off near my SD1 yesterday. When I turned it on this morning there was some bad distortion coming out of both outputs. I tried swithing midi cables and amplifiers and nothing helped.
There is no distortion when using the headphone jack. Could a grounding wire have come loose? If that's the problem, is there any way I can get it fixed short of sending it back to Ketron? (I have no handyman skills ).

Thanks for your suggestions!

Bob

What does this actualy mean?

??