Fujifilm FinePix 2650 Focus Problem

I have 4 2650 bodies (long story) 3 have broken or missing lenses, one seems to have an intact lens but my note on it says. "main board problem and autofocus error" . I have had these lenses apart and they are very hard to work on. They assemble them at the factory and glue the parts in place! Especially difficult are 3 tiny springs that stablize the retrofocus group to the main lens body. I've had better luck with the 2600 for some reason. My repair method is to find a camera on eBay that has a bad main board or power supply and a pristine lens module. Easier said than done, especially if they were dropped. Nice camera when they're working. The kids use two of the