Nine times out of ten, a dead remote is a dead battery. Here's the diagnostic order to go through before calling a pro.
Step 1: Battery
Swap the battery for a fresh one. If the LED on the remote lights up brightly, you may be back in business.
Step 2: Pair to the opener
Press the 'learn' button on the opener, then press the remote button within 30 seconds.
Step 3: Check the antenna
A snapped or coiled-up antenna wire dramatically shortens range. It should hang straight down.
Step 4: Interference
LED garage lights can cause interference. Try turning them off.
