Did you figure out what was wrong? I am having the same problem. I replaced all the bulbs with #24 bulbs, and now some are brighter than others and some don't even work. I think it is the bulb sitting in the socket itself. The old bulbs have a metal retainer that was soldered to the bulbs. I had to break this off the bulb, then press it back into the blue socket, then press the new bulb in. I am guessing the new bulb is not making good contact now with the metal retainer, but I have tried switching them around and everything I can think of and some still work and others don't. Any ideas???
