I have a Craftsman 139.53759 garage door opener that was installed in 1994. It still works great, except recently, the light will not turn off after the normal delay. Nothing short of removing the bulbs will turn the light off. I've looked in the owners manual and the troubleshooting guide says to check the ground (it is OK) and check to see if the light has been turned on at the wall (it has not). Is there an internal reset or other method of fixing this problem? I hate to purchase a new garage door opener or pay a service fee for a light problem, when everything works good.