My 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 to see if I can get them working again as the units are less than two years old. Looking to find the best way to begin troubleshooting the problem? (Sears so far has not responded to request for wiring diagram or other information.)

Thanks, any thoughts, suggestions would be appreciated as I would like to attempt to salvage these systems.