You have turned on your favorite TV series and Xiaomi Mi TV TV 4S or Redmi Smart TV Does X suddenly turn off without a command from the remote? Or does the device reboot cyclically before even loading the interface? TV Q2 2023), and on budget series (Mi TV 4A), But the causes and the solutions are always different, and 80 percent of the time, it's software failures, but sometimes it's hardware malfunctions that require a service center to intervene.
In this article, we will analyze all possible causes of spontaneous shutdown of Xiaomi TVs – from banal overheating to firmware failures, as well as give step-by-step instructions for diagnosis and troubleshooting. You'll learn how to tell a software failure from a power failure, when settings reset helps, and when you need to carry equipment for repair. All recommendations are based on the analysis of user reports from forums. 4PDA, Mi Community and Service Center Data.
1.Overheating: Why Xiaomi TV turns off after 10 to 30 minutes of operation
The most common reason for automatic shutdown is the overheating protection, which is the temperature sensor in Xiaomi TVs, which at critical values (usually is the most common). >85°C) forcefully shut down the device, most often the problem is manifested:
- 🔥 In summer or in poorly ventilated areas
- 📺 When viewing content in resolution 4K HDR (processor load)
- 🎮 When playing through Google Stadia or NVIDIA GeForce NOW
- 🔌 If the TV is installed in the niche of the furniture set (limited air exchange)
How do you check if it's overheating? After you turn off, touch the back of the TV in the vent area. If the body is hot (the hand can't hold it). >3 seconds), the problem is confirmed. Also note the power indicator: when it overheats, it can flash red or orange after turning off.
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If the Xiaomi TV is mounted on the wall, check the gap between the screen and the surface – it must be at least 10 cm for air circulation.
2. Problems with the power supply: symptoms and diagnosis
If the Xiaomi TV turns off immediately after turning on (after 1-5 seconds) or when connecting to an outlet, the power supply is 90% likely to be the fault (PSU). This is a problem with the Mi models. TV 4X Redmi Smart TV X55, where budget components are used, signs of failure of the power supply:
- ⚡ The TV is not turned on the first time (it takes several attempts)
- 🔌 The power indicator flashes white, but the screen does not light up
- 💥 When switched on, a click or smell of burning is heard
- 🔌 The TV only works from another power cable.
For diagnosis, follow the following steps:
- Turn off the TV from the socket for 10 minutes (discharge of capacitors).
- Try to enable it with another network cable (preferably original from Xiaomi).
- If possible, check the voltage at the output of the power supply multimeter (should be 12V–24V model-wise).
How to check the power supply without a multimeter?
Attention! If the power supply is swollen or has traces of melting, do not turn on the TV - this can lead to a short circuit or fire. PSU service-centre.
3. Firmware failures: how to fix software errors
Xiaomi TVs on Android platform TV or PatchWall often suffer from firmware bugs, especially after automatic updates:
- 🔄 The TV is turned off and turned on immediately (cyclical reboot)
- 📱 Hanging on the Mi or Android logo TV
- 🎛️ The remote does not respond, but the buttons on the TV are working.
- 🔌 Turn off when connecting to Wi-Fi or launching applications
Decisions in order of complexity:
Method 1: Resetting settings to factory
This helps in 60 percent of cases.
- On the remote, pinch the Menu. + Home for 5 seconds (for PatchWall models).
- Select Wipe Data/Factory Reset from the Recovery menu.
- Confirm the reset and wait for the reboot (it will take 5-10 minutes).
Method 2: Flashing through USB
If the reset does not help, you will need to manually install the firmware:
- Download the official firmware for your model from the Xiaomi Firmware website.
- Unpack the archive and copy the update.zip file to the flash drive (FAT32 format).
- Insert the flash drive into the TV, pinch the Menu + Volume+ on the case and turn on the power.
- From the recovery menu, select Apply update from USB.
Download firmware for an accurate TV model|Format the flash drive into FAT32|Check file integrity update.zip|Turn off the TV before starting
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Attention! Do not turn off the TV while you are firmware, it can lead to a complete loss of performance (brick). >20 minutes, contact the service.
4. Malfunctions of the motherboard and capacitors
If the Xiaomi TV turns off at regular intervals (e.g., exactly 1 hour) or responds to physical shocks (when moving), the problem may lie in the motherboard.
- 🔧 Bloated or leaky capacitors (especially in food chains)
- 🔌 Oxidation of connector contacts (HDMI, antenna)
- 📱 Damage to memory chips (eMMCs) due to frequent flashing
- 🔥 Burned tracks after a surge of tension
Diagnosis without disassembly:
- Light the flashlight on the screen after turning it off – if the image is barely visible, the problem is in the backlight.
- Try to turn on the TV without connected devices (set-top boxes, sound systems) – if it works stably, it’s your fault. HDMI-port.
- Check if the behavior changes when the TV is tilted (if so, poor contact on the board).
If you are not an experienced repairman, it is better to contact the service - self-repair of the board without a soldering station and an oscilloscope can exacerbate the problem.
Xiaomi Mi TV|Redmi Smart TV|POCO TV|Another Xiaomi|Not Xiaomi.-->
5. Problems with remote control and sensors
Sometimes the Xiaomi TV doesn't turn off by itself, but because of false commands from the remote or touch buttons.
- 🎛️ Sticking the Power button on the remote (often after a drop or hit by liquid)
- 🔘 Failure of the touch button on the body
- 📶 Interference from other IR devices (air conditioners, music centers)
- 🔋 Discharged batteries in the remote (can cause chaotic signals)
How to check:
- Remove the batteries from the remote and turn on the TV with a button on the case, and if it doesn't turn off, the remote is the problem.
- Try to control your TV through the Mi Remote app on your smartphone, and if there's no failure, it's the physical remote.
- Check the Power button on the remote: if it is drowned or stuck, clean it with alcohol.
If the remote is to blame, replace it or buy a universal one (for example, Xiaomi Mi). TV Remote with Bluetooth.The cost of the original remote — from 1,500 ₽.
Instable power supply: how to protect the TV
Xiaomi TVs are sensitive to power surges in the network.If in your area frequent blackouts or voltage drops below 190V, It can cause:
- ⚡ Self-involved reboots
- 🔌 Turn off when connecting powerful devices (vacuum cleaner, microwaves)
- 💥 Damage to the power supply over time
Decisions:
| Problem. | Signs. | Decision | Cost |
|---|---|---|---|
| Low voltage (<190V) | The TV is turned off in the evening (peak load) | Stress stabilizer (for example, Resanta ASN)-1000) | 2,500 ₽ |
| High voltage (>250V) | TV overheats, power supply makes noise | Voltage relays (e.g., Zubr) D63t) | 3,000 ₽ |
| Impulse interference | Turning off the refrigerator/air conditioner | Network filter with impulse protection | 1,000 ₽ |
| Frequent blackouts | The TV will not turn on after the power outage | UPS (e.g., UPS, APC Back-UPS 650) | 5,000 ₽ |
Attention! Don't use cheap network filters without pulse protection, they won't save you from power surges. Xiaomi TVs recommend equipment with protection of at least 1,000 J.
7.Problems with HDMI-ports and external devices
If the TV turns off when you connect a console, sound bar or game console, the problem may be:
- 🎮 Incompatibility HDMI-versions, for example, HDMI 2.1 prefix + HDMI 2.0 port)
- 🔌 Damaged cable (broken wires inside the flatbed)
- 📺 Protocol glitch HDMI-CEC (multi-device management)
- 🔊 Sound format conflict (e.g. Dolby Atmos on incompatible sound system)
How to diagnose:
- Connect the problem device to another HDMI-television-port.
- Try another cable (preferably certified High Speed) HDMI).
- Turn off the function. HDMI-CEC In the settings of the TV: Settings → System system → HDMI-CEC → Turn it off.
- Check the sound settings on the external device - install PCM Dolby Digital instead of Dolby Digital.
If the TV only turns off when you connect a particular device (for example, Apple) TV 4K), Update both devices to the latest version.
8.When to contact the service center
If you've tried all the ways, but the Xiaomi TV still turns off on its own, it's time to bring it in for repair.
- 🔧 After disassembly revealed bloated capacitors or melted tracks
- 💥 The TV does not turn on even after flashing.
- 🔌 The power supply unit makes extraneous sounds (squeaking, crackling)
- 📱 Vertical stripes or artifacts appeared on the screen
- 🔥 The body is very hot even when turned off.
The cost of repairs in official service centers Xiaomi:
| Type of repair | Cost (₽) | Date(s) |
|---|---|---|
| Replacement of the power supply | 3 000–5 000 | 1–3 |
| Maintenance of the motherboard (replacement of capacitors) | 2 500–4 000 | 3–5 |
| Replacement of illumination (LED-ribbon) | 4 000–8 000 | 5–7 |
| Flashing through the service port | 1 500–2 500 | 1–2 |
Before the service visit:
- Make a backup of the settings (if the TV is still turned on).
- Write down the serial number of the model (located on the sticker at the back).
- Check if the warranty is maintained after repair.
Official Xiaomi service centers in Russia can be found on the website: mi.com/ru/service.