Orgen

Hey there, so I was going out one night and all of a sudden I get a warning light on my digital dash and I notice it's for one of the bulbs so I look inside and sure enough the bulb was popped. There were only the end pieces and everything in the middle was gone. Another bulb I guess was mong ad contact and started to smoke up. I'm going to take some pictures so you guys can see what I mean but I just want to know if you guys might have any idea. I thought it was the ballast but if hat was the case then wouldn't the other bulbs not even light up ?

Thanks for any suggestions .