Just joined the club again (2nd time).
Curious for a price-check on the Matt McKee topper value?

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Has anyone ever had controlled Inserts work during test modes and not work otherwise?
I've changed the LEDs and even 1 of the sockets with no avail.
Here's a quick video of the issue
Any suggestions is appreciated

Incandescent bulbs act similar. I've swapped several LEDs and still get similar results as well

This was LED'd prior to my ownership but I've LED'd around 50 games and have had flickering issues. Ive also had Hergs OCD board. This is more than a flickering issue. I'm leaning towards it being a bad diode in the column. I've ordered a few new sockets from PBL. Hopefully I'll find 1 that's bad

Sorry, I never posted back on here but I was able to get it working correctly
After removing the entire column lamps, except the 2 light with problems, it gave the same results.
I removed all the lights in row 1, same results still.
I started testing all diodes in the column and found the pop had a suspicious DOTS (diode on terminal strips) with close wires.
I pulled it out, tested, and examined - it was OK, I put it back.
After turning on again to test, it worked.
IDK what the issue is, but possibly linked to the DOTS on that column.
I'm happy that it working but still kinda curious as what was the cause.

If it is mushroomed (rounded, not flat on top), you should replace the magnet core.