The top left lamp in the Valley of Demons has decided not to work. Ground wire to the lamp socket activates the lamp. Ground wire to the corresponding SCR leg "A" activates the lamp. In diagnostic test the lamp does not work. i have also replaced the socket.

I am using a new lamp driver board.

Thanks,

Damn. I was afraid of that. It is an Alltek with those little SCR. Are they difficult to replace?

Below the bad SCR are through holes. I read another post that said those were for replacements. What type SCR do I need? The surface mount is CR088 but that does not bring anything up when I google it.

Great. I have both. Install the flat part of the 2n45064 with ID oriented down when the board is installed in back cabinet?

Dropped ina 2n45604 in the through holes. Backenup and going. Thanks

So, now I have a new lamp problem. The "O" at the top saucer will not light. Ground wire to socket base it lights. Ground wire to Q25 the SCR, does not light. I buzzed the Q25 with a logic probe and it appears okay. I checked continuity on Q25 and it also appears okay. don't know why the alltek board has decided to start acting up.

So this is interesting. When I reinstalled the Alltek Lamp board after replacing SCR, I noticed one of the ground screws was missing so i reinstalled the board with two ground screws. If I remove the second ground screw the "O" lights back up. It must short to the back box somewhere.