I just recently did a playfield swap on my Fathom.
I am having an issue with the Right Saucer arrow (green insert).
If I go into lamp test via the coin door button, all the bulbs turn on and off. So the lamp works in test.
During gameplay the lamp does nothing - never lights.
Last night the lamp stopped working in test mode. I tested the SCR Q19 for the lamp and the numbers were not good so I replaced it. The lamp now works again in test but still does nothing during gameplay.
I have tested the ground of the lamp and I get continuity so My thought is the ground is okay
The lamp is lighting in test mode.
I have checked the lamp to make sure nothing is shorting it.
I have not tested the resistor associated with the SCR yet but will.
I am not sure how to check the chip associated with it which is U2 so any advice would be great.