Xiaomi TV turns off on its own: 7 reasons and what to do in 2026

If your Xiaomi Mi TV (or Mi TV A Pro, Mi TV Q2, Redmi Smart TV) suddenly turns off without a command from the remote, it doesn't always mean a breakdown. In 80% of cases, the problem is solved on its own without going to the service center, but it's important to correctly diagnose the cause: from a banal overheating to a firmware failure or a power supply failure.

In this article, we will look at all possible scenarios, from simple (like an activated sleep timer) to complex (like the failure of the capacitors on the motherboard), how to check each option, what settings to change and when to really carry the TV for repair. And for models Xiaomi TV 2020-2026, we will give current data on typical “diseases” of specific series.

First, rule out the obvious: make sure that the problem is not in the remote (try controlling the TV through the Mi Home app or buttons on the case) and that the outlet is stable. If the TV turns off only when it is turned on or after a fixed time, this is one algorithm of actions. If the outages are chaotic, another. Let's start with the diagnosis.

1.Overheating: The most common cause of spontaneous shutdown

Xiaomi TVs (especially those with a diagonal of 55 inches) are prone to overheating due to the compact body and powerful processors Amlogic or MediaTek. At a chipset temperature above 90-95 ° C, the protection is triggered, and the TV turns off. This is the normal reaction of the system - this is how to prevent damage to components.

How to check:

• 🔥 Touch the back of the TV after it's turned off. If it's hot (especially around the vents), it's a cooling problem.
• 📺 See if the message "High temperature, cooling..." (characteristic of Mi TV 4S/4X) appears before turning off.
• 🕒 Pay attention to the operating time: if the TV turns off 30-60 minutes after turning on, it is a typical symptom of overheating.

What to do:

• 🪟 Ventilate: Move the TV from the wall by 10-15 cm, remove dust from the vents (use the vacuum cleaner at minimum power).
• 🌡️ Check the room temperature: If above 30°C, turn on the air conditioner or fan, directed not to the screen, but to the back panel.
• 🔧 Remove the back cover (if warranty expires) and clean the processor radiator of dust. In the Mi TV Q1E and later, the radiator is often glued with a heat pad — it is also worth replacing.

⚠️ Warning: If the TV continues to overheat after cleaning, check the fan (if your model has one). In Xiaomi Mi TV 4A and 4C, the cooler often fails due to bearing wear and tear. It will cost 800-1,500 rubles to replace.

2. firmware failures and software errors

If the TV turns off when specific applications (such as Netflix or YouTube) are launched, the software is to blame. Most often, the problem occurs after automatic updating or manual installation of informal firmware. In Xiaomi TV models 2021-2023, shutdown bugs were recorded in MIUI TV versions 2.0.15-2.0.19.

Signs of software failure:

• 🖥️ The TV is turned off when you log in to Settings → System.
• 🔄 Once turned on, the Mi logo appears, then the screen goes out.
• 📱 Mi Home or Google Play apps are not responding.

Decisions:

1. Reset to factory settings: Settings → Device → Reset and Restore → Reset all settings Attention: this will remove all installed apps and accounts.
2. Update your firmware manually: Download the latest version of the software for your model from the official Xiaomi Support website. Copy the update.zip file to a flash drive (FAT32). Insert the flash drive into TV, go to Settings → About TV → System Update → Local Update.

Reverse to the old version of the software

"downgrade"

Take screenshots of current screen and sound settings |

Record the username/password from the Mi and Wi-Fi | account

Disable all external devices (set-top boxes, soundbars) |

Connect the TV to an uninterruptible power supply (UPS)-->

Problems with the power supply (PD)

If the TV turns off immediately after turning on (the indicator goes out or flashes red), the power supply is to blame. In Xiaomi Mi TV 4A and 4C models, this is a weak point - capacitors in the PD swell after 3-4 years of operation. In the new series (Mi TV Q2 2023, Redmi Smart TV X Pro), the problem is less common, but also occurs.

How to diagnose:

What you can do on your own:

• 🔌 Check the power supply for bloated capacitors (they look like "bloated barrels"). If you have a soldering iron, replace them with new ones with the same capacity.
• 🔄 Connect another power supply with similar characteristics (voltage and current strength should match!). For Mi TV 4A 32, the PD from the monitor will fit on 12V/2A.
• 🛠️ Check the fuse in the PD (if you have one). In Xiaomi models, it is often located near the input 220V.

⚠️ Warning: If you don't know how to electrically, don't try to repair the power supply yourself! An error can lead to electric shock or fire. In service centers, PD diagnostics costs 500-800 rubles, replacement costs from 1500 rubles.

4. Maternity board malfunctions

If the power supply is fine, but the TV is still turned off, the motherboard may be the problem.

• 🔥 Burnt chips (especially in processor power circuits).
• 🕳️ Microcracks on board tracks (due to overheating or mechanical stress).
• 🧲 Failure of BIOS (in MediaTek MT9611/MT9638 models).

Symptoms:

• The TV is turned on, but the screen remains black (backlighting works).
• The image appears for 5-10 seconds, then the TV is turned off.
• When connected via HDMI, other devices (set-top box, PC) work normally.

Diagnosis and repair:

• 🔍 Look at the board for blackened or bloated items, and look at areas near the processor and RAM.
• 🔧 Reflash BIOS (power users only!). This requires a programmer and firmware dump for your model.
• 🛠️ Drink the CPU and memory contacts, and 30 percent of the time, that solves the problem of spontaneous shutdown.

External devices and cables

Sometimes the TV turns off due to a conflict with connected devices: consoles (Xiaomi Mi Box, Apple TV), soundbars, USB- drives or HDMI- cables. For example, Mi TV P1 and Q2 models have known a bug that disconnects when connected to port HDMI 3 (ARC).

How to check:

• ⚡ Disconnect all external devices from the TV and check if it is switched off now.
• 🔌 Try another HDMI- cable (especially if you use cheap, uncertified wires).
• 🎮 Update the firmware of external devices (such as the Mi Box or gaming consoles).

Typical problems:

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If the TV turns off when you connect to a specific HDMI port, try resetting HDMI-CEC. Go to Settings → HDMI-CEC → Reset.

Hardware malfunctions: screen, backlight, buttons

Less commonly, the problem lies in hardware components not related to boards:

• 💡 Backlighting (LED- tape): If the TV turns on but after a few seconds the screen goes out (the sound remains), the LEDs are to blame. In Xiaomi Mi TV 4S and 4X models, this is a common problem after 2-3 years of use. Repairs will cost 3,000-6000 rubles.
• 🔘 Power button: If it's locked or oxidized, the TV can turn off spontaneously. Check if the button is stuck (press it several times).
• 📡 Wi-Fi/Bluetooth- Module: In rare cases, malfunctioning leads to reboots. Turn off the module in the settings and check for stability.

How to diagnose:

• Hold the flashlight to the screen in a dark room, and if you're watching a faint image when you're watching the TV, the problem is the backlight.
• Light the power button. If it glows red even when the TV is off, the power button is on.
• Turn off Wi-Fi and Bluetooth in the settings. If the TV stops turning off, it's the wireless module's fault.

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If the TV turns off only when the backlight is turned on (for example, when you start a movie), but it works in the menu, the problem is exactly in the LED-Lent or its driver.

7. When to contact the service center

If you’ve tried all the ways, but the Xiaomi TV still turns off by itself, it’s time to contact the specialists.

• 🔥 The TV smells like a burn or there are traces of melting on the boards.
• ⚡ The power indicator flashes a non-standard code (for example, 7 times in a row - this is a motherboard error).
• 💥 TV is turned on with a sonic click and immediately turned off (break in the power supply).
• 🔧 You've tried to reflash the TV before, but it doesn't even turn on in recovery mode.

Cost of repairs in official Xiaomi service centers (2026):

Where to repair:

• 🏢 Official Xiaomi Service Centers (listed on mi.com/ru/service) Repair warranty - 6 months.
• 🔧 Unofficial workshops (cheaper by 20-30%, but without a warranty for spare parts).
• 📦 Self-substitution (only if you have experience in electronics repair) Parts can be ordered on AliExpress or in stores like Chipdip.

⚠️ Warning: If your TV is warranty (usually 12 months), don't open the case and try to repair it yourself! This will void the warranty. Contact the service center with a check and a product passport.

💡

Before visiting the service, take a picture of the TV serial number (on the back) and save a copy of the check.

FAQ: Frequent questions about spontaneous shutdown of Xiaomi TV