I have a Boss ODB-3 bass distortion pedal that is not working. I bought it used and it is out of warranty. I have tried both the A/C adaptor and batteries to no effect. There is no sound going through to my amp and the light does not come on. I've opened the case to see if there were any burn marks on the circuit board and there aren't. Also, all the connections seem to be in place. I don't know if it's worth repairing. Any ideas?