First of all check to make sure there are no wires hanging loose especially around that limit switch assembly. If all is okay you probably have a bad logic board.

Also make sure all the wires are still connected to the start capacitor. If you have a wire off it will cause the problem your describing. The start capacitor is located to the right on the motor. It is either gray or blue in color and should have four wires connected to it.

i also have the same opener.
my problem that just started is the battery powered remote and the built-in remote on my car no longer activates the opener. the wired switch inside the house still works the opener, however the green light inside the switch is now flickering.
also about 2 weeks ago, the light socket has stopped working. the light will not turn on when opened or closed.

any suggestions?

thanks a lot!

joe