Hi Everyone! I have a Bally Grand Slam 1983 pinball that has flickering displays. I substituted all the displays into another game (Mystic) and they checked out fine. I checked the voltage at the high voltage section of the solenoid driver board and I am only getting 135 volts with the adjustment pot turned all the way up. The unregulated voltage is about 163 V DC. The voltage at the test point on the power supply module that drives the high voltage is also at 163V DC (should be 230 V DC). The voltage into the set of diodes CR1, CR2, CR3, CR4 (essentially a bridge rectifier) is correct at 170 V AC. The voltage into the back side of the 4 diodes (bridge) is correct at 6.5 V AC. I replaced all 4 diodes but the output from the high voltage section is still 163 V DC. Any ideas?