TV Remote Not Working: The Complete Checklist

Batteries: not as obvious as you think

Start with a brand-new set of batteries, not a set borrowed from another remote, because partially drained batteries can power the LED weakly enough to fail at range while seeming fine up close. Check the contacts inside the battery bay for white or green corrosion, which is common in humid weather; clean it gently with a cotton bud and a little vinegar, then dry thoroughly before refitting fresh batteries.

The phone-camera IR test

Infrared light is invisible to your eye but visible to most phone cameras. Open the camera, point the remote's front end at the lens, and hold any button. A working IR remote shows a small flashing light on the screen. If you see the flash, the remote is transmitting and the fault sits with the TV's sensor. If you see nothing on any button with fresh batteries, the remote itself has failed.

Note that many front cameras filter infrared more aggressively than rear cameras, so try both. Also remember this test only applies to infrared remotes; Bluetooth smart remotes won't flash for most buttons.

Check the path to the sensor

The TV's IR sensor usually sits behind the bottom bezel. A soundbar placed in front of it, a decoder stacked too close, or even a glass cabinet door can block or scatter the signal. Move obstructions, aim directly at the sensor from a couple of metres, and try again. Bright sunlight flooding the sensor can also swamp IR signals, which explains remotes that only misbehave at certain times of day.

Re-pairing smart remotes

Modern smart remotes from Samsung, LG and others use Bluetooth for most functions and can simply lose their pairing after a power cut or battery change. Each brand has a re-pair procedure, typically holding two specific buttons together while close to the TV until a pairing message appears; check your model's manual for the exact combination. If the remote controls power but nothing else, a lost pairing is almost certainly the cause.

Stopgaps and when the TV is the problem

While you sort it out, most smart TVs can be driven from the manufacturer's phone app over your home WiFi, and every TV has physical buttons or a joystick hidden on the frame or back panel. If a known-good replacement remote also fails and the app works, the TV's IR receiver or control board is faulty, which is a small, worthwhile repair rather than a reason to replace the set.