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1. First find out which one is broken
Almost everyone starts by changing the batteries. That is the wrong first step, because it answers nothing: if the television's receiver has failed, fresh batteries change nothing and you have learned nothing either.
There is a two-minute test that splits the problem in half, and almost nobody knows it. An infrared remote emits light your eyes cannot see — but a camera sensor can see it.
- Open the camera app on your phone and switch to the front-facing (selfie) camera. This matters: most rear cameras have an infrared filter, while front cameras usually do not.
- Point the end of the remote straight at the lens, a hand's width away, and watch the screen.
- Press any button on the remote. If you see a faint purple or white flicker at the tip on screen, the remote is transmitting and the fault is at the television's end. If nothing appears at all, the remote itself is the problem.
This test only works on infrared remotes. If your remote has a microphone button, a pointer, or paired with the TV when you first set it up, it is a Bluetooth remote and sends no light at all — nothing will show on camera even when it is perfectly healthy. Those remotes are covered in step 4.
2. Batteries — the part people get wrong
“I changed the batteries” is true far less often than people think. Five things go wrong here:
- The new batteries were not new. Loose cells in a drawer self-discharge for years. Test them in something else first, or use a pair straight out of a sealed pack.
- Mixing an old cell with a new one. The weak one drags the pair down and the remote works intermittently — which reads exactly like a dying remote.
- Corroded contacts. Look for white or green powder and dull grey springs. Rub each contact with a pencil eraser or a cotton bud with a little vinegar, let it dry fully, then refit.
- A spring that has lost its tension. If a cell wobbles in place, bend the spring out slightly so it grips.
- Orientation. Obvious, and still the cause often enough to be worth ten seconds of checking.
After refitting the batteries, take them out again, press and hold any button for about fifteen seconds, then put them back. This drains the residual charge from the remote's own circuit and clears a stuck key, which is a genuine and surprisingly common fault.
3. The signal path — sensor, sunlight and soundbars
If the camera test showed the remote transmitting, the problem is between the remote and the television's receiver:
- Wipe the dark window at the tip of the remote and the receiver window on the television. Both are usually a small dark panel low on the front of the set, often near the standby light. A film of dust or a sticky fingerprint is enough to cut the range sharply.
- Check what is in front of the sensor. A soundbar placed just below the screen is the single most common culprit, and it appears right after someone buys one. A vase, a console, a decorative panel or a very thick TV cabinet door do the same.
- Move out of direct sunlight. Sunlight and some energy-saving bulbs flood the receiver with infrared noise. If the remote works at night but not in the afternoon, this is your answer.
- Get closer and straighter. Infrared is line-of-sight. Standing at a sharp angle, or more than about five metres away, is enough to lose a weak signal.
Test from one metre, straight on, with the lights off. If it works there and not from the sofa, nothing is broken — something is in the way or the batteries are weak.
4. If it is a smart remote, it has to be re-paired
This is the step that fixes most modern televisions, and the one most people never reach. Remotes with a microphone, a pointer or a voice button are not infrared: they connect over Bluetooth, and that connection can drop. When it does, the remote looks completely dead even though both it and the television are fine.
A good clue: if the power button still works but nothing else does, you are almost certainly looking at a lost Bluetooth pairing. Many of these remotes keep a basic infrared power command as a fallback, so power survives while the rest does not.
| Remote | How to re-pair it |
|---|---|
| LG Magic Remote | Point it at the television and hold the wheel (OK) button for about five seconds, until the pointer appears. If that fails, hold Back and Home together for five seconds to unpair, then repeat. |
| Samsung Smart Remote (2017 and later) | Hold Return and Play/Pause together for more than five seconds, with the remote pointed at the television. |
| Roku voice remote | Open the battery compartment: there is a pairing button inside. Hold it for five seconds until the status light flashes. |
| Fire TV remote | Hold the Home button for ten seconds. |
| Apple TV Siri Remote | Hold the remote close to the Apple TV and press Back and Volume Up together for five seconds. |
| Chromecast with Google TV | Hold Back and Home together until the light on the front pulses. |
| Sony, TCL, Hisense and other Google TV sets | Pairing keys differ by model, so use the menu instead: Settings, then Remotes & Accessories, then pair the remote. If you cannot reach the menu, the joystick under the panel will get you there. |
If your television cannot be reached at all without the remote, the control on the body of the set will open the menus. Its location by brand is covered in our guide to using a television with no remote at all.
5. Reset both the remote and the television
If the remote transmits, the path is clear and pairing has been redone, reset both ends:
- Power-cycle the television properly. Unplug it at the wall, wait a full minute, then plug it back in. The minute matters — it discharges the internal capacitors and genuinely resets the board, which switching it off at the socket does not do.
- Drain the remote. Batteries out, hold any button for fifteen seconds, batteries back in.
- Unplug every HDMI device. A faulty device holding the HDMI-CEC line can make a television ignore its remote completely, and this is far more common than it sounds. Reconnect them one at a time to find the culprit.
- Check for a child lock. Some sets disable the remote entirely in that mode, and it can be switched on accidentally.
If the remote transmits, the sensor is clear, pairing is done and a power cycle changed nothing, the receiver in the television has most likely failed. At that point a phone over the network or a replacement set is the realistic answer, not another remote.
6. Buying a replacement that actually works
If the remote itself is dead, the choice matters more than it looks:
- The manufacturer's own replacement. Search the model number printed on the back of the television, not the name of the range. It behaves exactly like the original, including the buttons that open the smart platform.
- A universal remote. Reliable for power, volume, channel and input. Know before buying: it usually cannot reach the smart menus or the app shortcut buttons, because those are not standard infrared commands. On a Bluetooth-only remote there may be nothing for it to replace at all.
- A phone on the same network. Android TV, Google TV, Samsung from roughly 2016, LG from roughly 2014 and every Roku accept commands over Wi-Fi, so a phone can take over permanently.
Whichever you choose, write the television's model number somewhere now. It is the one piece of information that makes every repair and every replacement faster.