There are 6 high power switches that need to be working for the 4 flippers to work correctly. Check the 4 EOS switches by checking the resistance across them when closed (power off). Touch your test leads to where the wires connect to the switch. If more than 1 ohm resistance, replace that switch. Also check the 2 lower NO switches. Hold them closed with you fingers and check resistance. Again, more than 1 ohm resistance, replace. PB resource sells the NO switches and the correct EOS switches.
On the weak upper flipper, it's likely either the lower NO switch or the upper EOS switch. On the weak lower flipper, it's likely the lower EOS switch. Checking resistance on all the switches should narrow it down.
Woodhaven, MI
