JT,
If the head won't work on the E1e then you either have a break in the circuit somewhere or a dead Luxeon??!?!? There isn't anything else going on in the front end. It's just the LED and leads for + and -. Can you open a staple up and drop it down on the cathode ring for bridging between the battery tube and the cathode ring? I am amazed that you might have a dead LED. Obviously SF will take care of the problem.
- Don
PS. I won't ask if you tried a new battery..........