I have been slowly cleaning my LOTR, putting down a playfield protector, changing to LED and some general cleanup of playfield and components. I started up the machine for the first time in about 6 months and quickly discovered that the right flipper has stopped working (I had already re-built the flippers prior, new coils, EOS switches etc. and they were in perfect condition before the clean-up job =).
In the dedicated switch test menu, #4 Right Flipper EOS is always on but the left flipper is not. I somehow thought that they should both be on? If I manually move the right flipper to disengage the EOS, the #4 switch in the diag turns off. Both flipper buttons work as expected.
Same as this older post: https://pinside.com/pinball/forum/topic/lotr-right-flipper-pain
But, when I perform the coil test, both left and right flippers work fine (which isn't the case in that post).
So, I have tested:
Coil resistance: 3 ohms
Coil voltage: 74v
Coil diag tests works for both flippers
Replacing the right flipper EOS switch to a brand new one
I'm planning to pull out the I/O board and check for burnt traces as well as test the Q16 transistor tomorrow but I'm not convinced that it can be an issue considering that the coil test is working, or?
What else should I be testing?