There is a fuse under the playfield, but it would only be for the other playfield coils. The flippers are fused by the rectifier board. Since the game boots the rectifier fuse has to be good.

Check for power on the flipper coil lugs. If you have 43V there, then the problem is the path to ground, which includes the cabinet switches, solenoid driver board connectors, flipper relay and driver transistor on the SDB, and traces on the back of the SDB which sometimes become a fuse and burn up when the rectifier board is over fused.