PC light problems!!

[Twisted-1]

I just had a PC bulb burn out and when I put in the replacement it will only light up the very end of the tube where it plugs in. I thought the bulb was crap so I went to return it but it works fine in the store. What could be the problem? It is a 18watt 50/50 in my Nano. I have checked the fuse and its fine. Don't know what else to check.

[Bob I]

If the bulb works fine in another fixture, I would suggest the ballast is shot. You probably can't get at the ballast, so I would return it if is under warranty. Otherwise you will probably have to replace it.:sad:

[Twisted-1]

How would I know that the ballast is the actual problem? Could it be the wiring maybe?