I Have a Gottlieb Wipe Out (System 3). The bottom left kicking rubber mosfet (Q4) keep blowing off. I have already replaced the Coil diode, the 2.2k resistor, I have measured the coil resistance (16 ohms). Everytime I replace the mosfet, it works for a little bit, and after a while it blows Q4 and after that it blows the 1.5A fuse. Any ideas?