(Model: JVC KD-SH99R MP3)
Well my front/rear speakers sounded really tinny and then when I plugged my subwoofer+amp in it made a horrible noise so I disconnected that straight away. So I took it to a local shop (friend of a friend works there), not the best place but i'd have to travel a good 30mins to get it checked by a decent shop so I thought it might have just been a loose wire or something simply (I know absolutely nothing about car audio, don't even know how to take the HU out) so got them to look at it anyway.
I left it with them for an hour with a "im not sure what the problem is, find out and lemme know". I returned and they said it was an internal grounding fault so they soldered "something something something" to "help me out" and said if it breaks again to just buy a new HU. It worked perfectly on the way home, but when I went to drive my car the next morning it was back to the tinny+distortion so I havent used it in like 4-6wks.
I didn't ask them to bodge it but they thought they were doing me a favour (shop manager had a import and he liked mine). Cost me $80 which I wasn't happy about when it broke (didnt ask for a bodge job and it broke 24hrs later) but ah well im over that now, just wouldn't mind it fixed. I'm not missing it much coz I dont drive my car much (especially long trips) but I hate things not working properly.