The ceiling fan remote has lost part of its function. The button which turns the light off/on and dims the lights will only dim the lights. It will not turn the lights off and on. All other functions work such as fan speed, fan off/on and reverse. Any thoughts

You can buy a replacement remote at Home Depot for $39. Before you buy the new one try holding down the on/off button on the remote. Hold for about 4 seconds and see if this doesn't change the behavior of the remote.