Bought this camera used from a neighbor as-is for $90. Got several great trips' worth of pictures out of it - my money's worth. On the last trip, I was shooting while a passenger in a car (closed windows, no dust) and in between shots it just died. I immediately changed to a new set of batteries and yet another set, so I know it's not them as they all test as new. I cleaned the upper contacts and the battery cover closes properly, I think. No visible gaps there. Lower battery contacts tough to reach, but I blew it out and they look OK.

Suspect some wire came loose, as the lens did not retract, like it would if batteries were low. Owner's manual doesn't offer me much help.

Any suggestions? I do have small screwdrivers and used to take mechanical watches apart, but this is no watch.