I have a dimmer switch that has been fine for a few years. It turned on the second I turned the dimmerv switch. but since a few weeks the light came on with a delay of a few seconds (looked as there was a connection delay) and then it went from a few seconds delay to 5 seconds delay. and since a few days the lights don't go on at all. Any advice, could this be a small problem and resolved with replacing the dimmer switch or could it be more major?