To get your garage door opener to work again when it fails to open or close, you need to diagnose cause and apply appropriate fix that restores power, alignment, and mechanical function. First, check power, as opener may be unplugged, breaker tripped, or GFCI outlet tripped, so ensure opener is plugged in, outlet works by testing with other device, and reset breaker. Check if manual lock on door track is engaged that prevents opening and disengage it. Inspect safety sensors near floor, as dirty or misaligned sensors with blinking LEDs prevent operation, so clean lenses with soft cloth and align until both LEDs are solid, one sending and one receiving. Try opening door manually by pulling emergency release cord and lifting door; if door is very heavy or won't lift, torsion spring may be broken requiring professional replacement costing 200 to 400 dollars, as door should lift easily when springs are good. Check remote battery and reprogram remote by pressing learn button on opener and pressing remote button. Adjust travel limits if door stops short, using screws on opener unit. Check wall button wiring for loose connections. To reset opener, unplug for 30 seconds then plug back in, which resets logic board. If opener hums but doesn't move, trolley may be disconnected or drive gear stripped. Lubricate rollers and tracks with silicone lubricant to reduce binding. If none works, call professional garage door service for diagnosis.
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