MY TSPP has recently started rebooting. When turned on it tests, hits attract mode, and then boots and does the same. If im quick i can get a game started. Recent work includes changing the right top flipper coil on the lower playfield, and the Q14 transistor. When I get a game started that flipper and everything still works but after maybe 20 seconds the game reboots still. I have turned off everything else on that breaker as well just to make sure I am not overloading. Any thing to look for? Thanks.