Introduction: Why did the remote stop working right now?
You pressed the power button on the remote, but Xiaomi TV didn't respond -- the screen stays black, the light doesn't flash, and there's no turn on sound -- a situation that many owners of smart TVs of this brand, especially after firmware updates or prolonged downtime, know, 80 percent of the time, the problem is solved in 10 minutes without calling the wizard, but you need to pinpoint the source.
In this article, we will discuss all possible causes, from banal (discharged batteries) to technical (blinding of the Bluetooth module or IR receiver), pay special attention to the models of Xiaomi Mi TV 4/4A/4S, Mi TV Q1/Q2 and Redmi Smart TV, because their architecture has specific nuances, you will also find step-by-step instructions with photos, table compatibility of remotes and answers to frequent user questions.
Before you start the repair, answer one question:
1. Batteries or battery: first check
Start with the obvious, the remote's power source, and even if the batteries were recently replaced, they could have run out of power because of:
- 🔋 Cheap alkaline elements (especially no-name brands) that lose charge over the cost of a product 2-3 month.
- 💧 Oxidation of contacts after moisture or condensate (relevant for bathrooms).
- 🔄 Constant standby (Xiaomi Bluetooth remotes consume energy even in a “sleeping” state).
How to check:
- Remove the batteries and inspect the contacts for corrosion (green plaque).
- Try other batteries, preferably lithium (CR2032) or Eneloop batteries.
- If the remote has a built-in battery (such as the Xiaomi Mi TV Stick Remote), plug it into charging for 30 minutes.
Check the voltage with a multimeter (should be ≥1.5V per element)
Clean the contacts with alcohol or eraser
Try batteries from another remote (such as an air conditioner)
Make sure that the polarity is (+/-) matching the marking in the compartment-->
⚠️ Attention: In the remotes Xiaomi Mi TV Remote Pro uses a custom charging connector (Type-C, but with reverse polarity!). Connecting a conventional cable can bring the device down.
2. Mechanical damage to the remote: what breaks most often?
If the batteries are fine, but the remote doesn't work, check it for physical defects.
| Defect | Signs. | How to eliminate |
|---|---|---|
| Cracks on the board | The remote works only when you press the body in a certain place. | Rate or replacement of fees (in the service) ~500₽) |
| Wear of the power button | The “fail” button or requires a strong press | Cleaning contacts with alcohol or replacing the membrane |
| Liquid intrusion | Corrosion on the board, buttons stick | Washing with isopropyl alcohol + drying 24 hours |
| IR LED dump | The remote does not work at a distance of >1 m | LED soldering or remote replacement |
For diagnosis:
- Remove the back cover of the remote (carefully poke around with a screwdriver).
- Check the board for microcracks (especially near the buttons).
- Check the IR LED (it should glow when you press the buttons - you can see through the camera of the smartphone).
How to check the IR signal without a camera?
⚠️ Attention: In the remotes Xiaomi Mi TV Bluetooth Remote does not have an IR transmitter! They only work on Bluetooth, and a special scanner is needed for diagnosis (for example, the nRF Connect application for Android).
Problems with the IR receiver of the TV: how to check?
If the remote is functional but the TV is not responding, the IR receiver may be at fault, located on the front panel (usually to the right or bottom of the Xiaomi logo) and looks like a small black window.
Typical malfunctions:
- 🚫 Lens contamination (dust, greasy prints).
- 🔌 Disconnection of the plume after falling or repairing.
- ⚡ Disrupting after a voltage surge.
How to fix:
- Wipe the receiver window with a soft napkin (do not use alcohol!).
- Check the connection of the plume (requires disassembly of the TV).
- If the receiver does not work, replace it (the details are worth it). ~300-800₽ model-wise).
💡
On some models (e.g. Xiaomi Mi TV 4S 55), the IR receiver is combined with the Bluetooth module, and if the remote and wireless headphone connection are not working, the problem is with this module.
To check the IR receiver:
1. Turn on the TV with a button on the case.
2. Go to Settings → Devices → Remote DU.
3. Select the IR test and point the remote to the receiver.
4. If the indicator on the screen does not respond, the module is defective.4. firmware failure or update conflict
After the software update (especially on Xiaomi TV with MIUI TV) there may be a conflict of remote drivers.
- 🔄 The remote works, but only some buttons (for example, volume control).
- 📱 Mi Remote app on smartphone controls TV, but physical remote does not.
- 🔧 In the settings missing section remote DR.
Decisions:
- Reset remote settings: Go to Settings → Devices → Remote DU. Select Reset settings. Reboot the TV.
- Firmware rollback: Download the old version of the software from the official website. Write it to the flash drive in update.zip. Insert the flash drive into the TV and select Update → Local Update.
💡
If the TV does not turn on after the update (even from the button on the case), you need to flash through the service port (JTAG).
⚠️ Attention: On Xiaomi Mi models TV Q1E And a new reset of the remote can lead to loss of binding Bluetooth accessories (columns, gamepads). MAC-address.
5. Conflict with other IR devices
Few people know, but IR signals from different remotes can block each other, for example, if there is an air conditioner or a music center of the same brand near the TV, their remotes can jam the signal from Xiaomi Remote.
How to check:
- 📺 Turn off all IR devices in the room (air conditioners, receivers, DVD-player).
- 🔍 Check the remote at a distance of 30 cm from the TV (no obstacles).
- 📱 Use the Mi Remote app on your smartphone – if it works, the problem is exactly in the IR conflict.
Decisions:
- Move the TV or interfering device to a distance of >2 m.
- Plug black tape on the IR receiver of the interfering device (to block the signal).
- Replace the IR remote with a Bluetooth version (e.g. Xiaomi Mi TV Bluetooth Remote).
💡
On some models (e.g. Redmi Smart TV X55), the settings include an IR Filter option, turn it on to reduce interference.
6. Hardware malfunctions: when you need the help of a master
If all previous methods have failed, the problem may be in the hardware of the TV, and here are some signs you should contact the service:
| Symptoms. | Probable cause | Cost of repair (₽) |
|---|---|---|
| The TV does not turn on from the remote or from the button. | Failure of the power supply or motherboard | 1 500–4 000 |
| The remote works, but the screen remains black. | Failure of the illumination or T-CON board | 2 000–6 000 |
| The indicator flashes, but the TV does not start | Bootloop failure (bootloop) | 1 000–3 000 |
| The remote works only at a distance of <50 cm | Failure of the IR receiver or antenna module | 800–2 500 |
⚠️ Note: On Xiaomi TVs with OLED-screens (e.g., Mi) TV Master OLED) Self-disassembly voids warranty and can cause pixels to burn out due to static electricity.
7. Alternative ways to control the TV
While the remote is in repair, you can control the Xiaomi TV in alternative ways:
- 📱 Mi Remote app (available for Android and iOS) supports all Xiaomi models, including Redmi Smart TV.
- 🖱️ USB-Mouse or keyboard (connects to port) USB TV-wise).
- 🎮 Gamepad (e.g. Xiaomi Game Controller or DualShock 4).
- 🗣️ Voice Assistant (Alice, Google Assistant or built-in Xiao) AI).
How to set up Mi Remote:
- Download the app from Google Play or the App Store.
- Connect your smartphone and TV to the same Wi-Fi network.
- In the app, select Add Device → Television → Xiaomi.
- Follow the instructions on the interface screen.