Hi Windell, I wish I could give you more info, but as I mentioned I was building this PCB along with two other bulbdial kits and the others went together fine….haven’t changed my rig or solder in anyway for many years…Just finished building some more nixie tube clocks with the same equipment too, no issues there either…not sure what to say! My bulbdial is still working after many years too! ;-) Perhaps a PCB solder track short to ground somewhere that’s very very tiny?