One other option. I have problems with a TAF during hot summer days as my external house voltage drops so that my basement receptacle voltage drops. This only occurs during the really hot days. I purchased a 1000VA UPS power supply ( from Staples about 100 bucks) and plugged the game into it. I tested it during a Hot day and it works great. During that hot day I plugged the TAF into the house receptacle and the game reset when hitting both flippers. Right away I plugged TAF into the UPS (which was plugged into the house receptacle) the problem went away and has not been back. I repeated this test several times with the same results. Between the voltage regulator and the battery pack in the UPS the Voltages on the TAF cards stay high enough to prevent the reset.