Two garage door openers were recently damaged by a power overload as a result of a mistake National Grid made on the pole outside my house I would like to troubleshoot the electronic elements?

If the utility company induced a higher than normal voltage on your home's incoming electric line, then many electric and/or electronics components may have been damaged It depends on the severity of the overvoltage and the duration Many appliance power supplies can absorb some overvoltage without damage. If the only things in your house that were damaged were two garage door openers, consider yourself lucky. This could indicate it was a minor overvoltage condition Troubleshooting tips: smell for burnt odors inside the controller turn off, wait 39 seconds, then turn back on (this sometimes resets microprocessors) if the unit involves programming for the remotes, and it was not damaged, by reprogramming the system it may (emphasize may) come back otherwise it is probably toast.

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