I have a ceiling fan with lights in a bedroom , it has been there several years and worked fine. I cut on the light from the wall switch the other day and thought the bulb blew because of a very audible pop but it had actually thrown the breaker. I reset it and when you flip the wall switch it does it again, I removed the light bulbs, still does it. The fan will cut on and operate when you pull the chain. There has been no new fixtures added. Where could the problem be ?