I went out tonight and my stereo started acting crazy. I have the Mach Audio system and replaced the stock 6 disc with an in dash Kenwood DVD a little over 3 years ago. Well tonight the sub stopped working and this has happened a few times, i just kinda wiggle the head unit and it kicks back on. I figure a loose wire. Tonight same problem. This time I wiggle and the whole thing goes out. No dice getting it to come back on. I pull out my handy dandy manual and check the number 31 fuse. It's good. Other than dismanteling my headunit to check for an internal fuse, any clue what it could be? Any help would be appreciated.