This may sound like a silly question, but the dimmer switch on our chandelier has worked fine since we've moved in 2+ years ago. Then last week a bulb fizzled out and caused the dimmer feature not to work. We thought it was just b/c the one bulb was out. But now, we installed a brand new chandelier and the dimmer won't work now at all. The light goes on and off, but no dimming. Do we simply need to replace the switch or is it something further? Thanks. :)