Remote control from Xiaomi Mi TV, Redmi Smart TV or Mi Box can fail at the most inopportune moment, and most often the problem lies not in the device itself, but in the basic things: dead batteries, contaminated contacts or accidentally activated parental controls, but in 20% of cases hardware malfunctions - from a remote to a failure of the IR transmitter.
This article will help you systematically diagnose Xiaomi remote without going to the service center, we will examine how to distinguish software failure from physical failure, what hidden testing features are in the firmware of MIUI TV, and what to do if the remote works “once again.” Particular attention will be paid to models with a Bluetooth connection (for example, Xiaomi Mi TV Stick or Mi Box S), where the diagnosis is different from traditional IR remotes.
All methods are tested on the current firmware of 2023-2026 and are suitable for remotes from the Mi TV series 4/4A/4S/5/5X, Redmi Smart TV X, as well as the Mi Box 3/4/S. If your model is older, some functions may be missing, but the basic methods of verification will remain working.
Basic inspection: batteries and physical damage
Start with the obvious: 90% of Xiaomi remote malfunctions are power or mechanical defects. Even if you “just changed batteries yesterday,” check them again — contacts may have oxidized or batteries may have failed.
What to do:
- 🔋 Remove the batteries and inspect the contacts in the compartment. Oxidation (green plaque) or alcohol/water contamination - clean with a cotton swab soaked in isopropyl alcohol.
- 🔄 Change the batteries (if you use 2 pieces), sometimes one battery will run out faster and the remote will not work smoothly.
- 📏 Check the density of the lid, and if it's not fixed, the battery contacts can move away when you press the buttons.
- 🔍 Look at the case for cracks. Falling the remote even from a height of 1 meter can damage the board or IR transmitter.
If the remote is running after replacing the batteries, but it stopped responding again a day later, the problem is the leakage current, which means that one of the buttons stuck inside (often OK or Volume+ buttons suffer), Solution: disassemble the remote and clear the contacts.
⚠️ Attention: In the remotes Xiaomi Mi TV Stick and Mi Box S use lithium batteries CR2032. Don't replace them with alkaline ones (LR) — This will reduce the life of the remote by 3 times.
2. IR transmitter check: Is the signal working?
If the Xiaomi remote does not respond to pressing, but the LED indicator flashes - the problem may be in the infrared transmitter (for models with infrared control), you can check its serviceability without special devices using a smartphone.
Method 1: Smartphone camera
- Turn on the camera on your smartphone (of any brand).
- Point the Xiaomi remote to the camera lens from a distance of 5-10 cm.
- Press any button (such as Power).
- If the IR transmitter is working, you will see a purple flicker on the smartphone screen.
Method 2: Testing through the application
For Android smartphones, install the IR Tester app (available on Google Play) that will show not only the signal's presence, but also its strength. The normal rate for Xiaomi remotes is 80-100%.
| Situation | Reason. | Decision |
|---|---|---|
| Signal is available but weak (<50%) | Contaminated transmitter or batteries discharged | Wash the IR window with alcohol, replace the batteries |
| The signal flashes chaotically | The board or button contacts are damaged | Disassemble the remote, check the tracks with a multimeter |
| There's no signal at all. | Infrared IR transmitter or chain break | Transmitter replacement (cost) ~300–500 ₽) |
Critical information: Xiaomi Mi TV 5X and later use the hybrid protocol IR + Bluetooth. If the IR transmitter is broken, but the Bluetooth module is working, the remote will work only after pairing with the TV through the settings menu.
☑️ Diagnostics of the IR transmitter
Check Bluetooth remotes (Mi TV Stick, Mi Box)
Remotes for Xiaomi Mi TV Stick, Mi Box S and some Redmi Smart TV models connect via Bluetooth rather than IR. Here the diagnosis is different: the signal is not visible through the camera, and problems are often associated with a mating failure.
How to check the Bluetooth remote:
- 🔄 Reboot the TV/set-top box. Hold the Power button on the case for 10 seconds until the light goes out.
- 📱 Remove the remote from the list of devices. Go to Settings → Devices → Bluetooth, find it. MI Remote and click "Forget».
- 🔗 Perform re-pairing: Press and hold back + Home on the remote 5 seconds. The indicator will flash blue — the remote in search mode. On the Bluetooth menu of the TV, select MI Remote and confirm the connection.
- 📊 Check the firmware version. → There should be a version of the TV at least lower. MIUI TV 2.0.18 (for stable Bluetooth operation).