Iluv335s

I have a POD XT Live that I wanted to give to my son to use, but it has no output of any kind to any of the jacks. I have looked everywhere on the forum, and I can't find the problem. This unit has hardly ever been used. I purchased the 500XT not long after getting this unit, and it has been sitting in a studio ever since. Everything seems to be working fine with the exception of there being no output. The tuner is registering an input, but I do have to play the string fairly hard to see it work. I have found places on the forum where others had this problem or something similar, and I have tried all of the recommendations. I am using the original AC power plug. I have turned the small output volume knob on the back up and down. I have recalibrated the volume pedal, and I have all of the latest software, and yes, the main volume knob is up. Am I missing something simple here? I hate to just throw this away, and I don't want to have to pay a repair shop to fix something. Any help would be appreciated.