Quoted from Billc479:Sounds like your wiring is not dropping out the high power winding and going to the low power (Hold) winding. Check your EOS wiring, make sure its working properly.
Yes that's almost certainly it. Look for big time GI dimming as well when you hold the flipper in.
This EOS should be closed until you flip, and then it should open. Make sure the tabs aren't bent and wires that shouldn't be aren't touching either.