BJM-Maxx

Did you ever resolve this? My Meteor does this too. It is not specific to ball 3 though. It flickers and sometimes even stays on during gameplay, but works find during attract mode and in between balls when the game flashes the HSTD. Never thought about a SCR though. I'll swap lamp boards with another of my games to see if it goes away.

Fantastic news. Swapping my known working lamp driver from my Harlem Globetrotters into Meteor eliminated my issue. I played 4 games and watched that light. With the Meteor lamp driver, it would flicker when a drop target was hit, when the spinner got ripped, random other times. With the Harlem lamp driver, that light behaved as it should. I have several Bally/Stern games that use this board, so it was easy to test. I wish you luck. Now I'm gonna go over the LDB in Meteor. Also gotta do the one in my Magic, as the Harlem LDB resolved some lamp issues I was having with it's original board.

BJM-Maxx
I replaced the SCR that controls the HSTD light and my issue stopped. Hope you fix yours.

Build bonus X and backhand collect bonus shot.

I hope none of us are paying 92 cents per LED unless they are flashers. I generally buy the bulk 100 packs from Comet for about half that.

EDIT:
Whoops, you guys are talking about sockets. Phew!

Or if you're gonna use LEDs, since you'll be doing the soldering anyway, use the 2 tabs to install a resistor to eliminate flicker.