I attempted to open my Craftsman belt-drive opener (model 139.53914D) yesterday afternoon with the remote and it wouldn't open. I entered the garage and the light bulbs in the unit were flashing on and off continuously. I unplugged the unit and plugged it back in to see if it would reset the opener, but the same problem persisted. I know that the lights blinking a certain number of times indicate a specific problem, but mine are blinking continuously and extremely fast. Does this indicate that the motor is locked up???? Thanks in advance for any help.......

ENS