I feel it is too much money to invest into an old piece of stereo electronics. It is like the old family car. First the battery, then the alternator, then the water pump then the radiator then the clutch then the oil filter housing then the tranny etc. At some point you just have to cut your losses and buy a new one and use it for another 15 plus years. Also, to me it feels like body work on a car, it never comes back from the shop as good fitting and looking as it came from the factory when new. My two cents.