I just posted this to alt.home.repair but then thought you guys might be able to help as well:
I installed a Genie Excelerator opener about 5 years ago. It has
>worked well up until last night's nearby lightning strike. We lost a
>variety of electronic things. The opener still works except for the
>safety sensor system. The sending side is not lit and the opener acts
>as one would expect - It opens just fine, but you must hold the button
>to close it. Is there a common part that fails in these situations? I
>can order a new board or a new set of safety sensors, but I thought
>one of you might have a hint as to which one is more likely to have
>failed. The voltage across the two terminals is only a few
>millivolts. That points to the board, but I suppose one of the
>sensors could have shorted. I think I'll go disconnect the sensors
>and see what the voltage does. In the mean time, any input is
>appreciated. ...Pat
>
Update to the above post... With the sensors (safe-t-beam) disconnected, there is still no voltage at the terminals where the sensors connect. I also noticed there is a green led flashing 5 times. The manual says that means a safe-t-beam fault. Anyone know how to get to the circuit board? It looks like the whole thing must be disassembled. I can see the board through vent cracks in the base plate, but actually getting to it to inspect or change parts looks to be very difficult unless there is a secret one of you knows;-) ...Pat