I'll get the replacements and then test - all the bulbs I have looked at have broken filaments or are black on top. I tested some of the better looking ones in a known working location but they didn't light up. If there was a connector issue you would expect all the bulbs attached to one board not to light up but there is no pattern at the moment. Anyway, it is a wait and see. I have taken some photos of the playfield which I will upload later so that people can marvel at its pristine condition.