Ok. So I found this amp in the garbage today. It had some structural damage to the baffle which I fixed temporarily..The real problem is as follows..The input jack is really testy..It either buzzes to high hell or it works fine, depending on what position you rig the cable..Also, the volume is stuck on one level..The volume knob doesnt work, neither does the gain knob..also the drive switch just mutes the sound. What can I do to get started here?