Quoted from eyeamred2u:He may only be a one man show. So was just a suggestion, so not permanent if he bends leaf. Harder to manually operate and look at display if you are a one man show sometimes, from my experience.
Already know it fires in coil test, will not flip, but upper does fire. I believe I read it does report as working in switch test, but I could be wrong, that is why I suggested check wiring on EOS.
You don't even need to lift the playfield to check this with switch test Just manually move the flipper while looking at switch test on the display. Upper flipper is a separate switch on the same stack. It's even possible the two switches are just stacked wrong and the second switch isn't getting enough travel to engage.
He should just open the coin door, enable the high power with the interlock switch, goto switch test, test the flipper buttons. The left flippers are switch 25 and 27 and should each both close when he hits the left flipper button. If they they never close, lift the playfield and check the mechanical action at the switch at the cabinet, visually inspect the two wire tabs on each switch and ensure nothing is disconnected. Try to manually close switch and see if switch test shows closure. If not, follow wiring back to CN9 on Node board 9 and look for something amiss. All three flipper switches are on that same CN9 connector.
EOS he can test by just manually moving the flipper during switch test and ensuring switch 16 opens when the flipper bat nears its end of swing.
It's likely something simple with either a single disconnected wire or simply the switches stacked wrong and not engaging.. which is easily tested with your fingers first.