Colored stripes at the bottom of the screen on Xiaomi TV: Causes and 5 working ways to eliminate

Color stripes at the bottom of the screen on Xiaomi TVs are a common problem faced by Mi model owners TV 4A/4S/4X, Redmi Smart TV These artifacts can manifest as thin horizontal lines (red, green, blue), shimmering stripes, or even wide color blocks that spoil the picture, ranging from software failures to hardware malfunctions, but in the end, the artifacts can be very different from the stains of the artifacts. 80% In some cases, the problem can be solved independently without contacting the service center.

In this article, we will analyze all possible causes of the appearance of bands - from incorrect settings. HDMI-We will provide step-by-step instructions for diagnosing and repairing the defect, especially for 2018-2023 models, where the problem is most often associated with firmware or peripheral devices. FAQ end-of-article.

Why do colored stripes appear at the bottom of the screen?

The causes of the defect can be divided into two categories: software (corrected by settings or updates) and hardware (required repairs).

Programmatic reasons:

• 🔄 Outdated firmware - in versions MIUI TV below 3.0 were signal processing bugs HDMI, artifact-producing.
• 🎮 Conflict with external devices – consoles (Xbox, PlayStation), receivers or sound panels can transmit an incorrect signal.
• 📺 Incorrect image settings – Game Mode enabled, HDR Dolby Vision on incompatible content.
• 🔧 GPU Failure – a temporary glitch after an update or overheating.

Hardware causes:

• 🔌 Damaged. HDMI-cable or port - oxidation of contacts or wires.
• 📱 Detachment of the matrix plume is a typical problem for TVs operated in high humidity conditions.
• 🔋 Failure of the power supply - voltage drawdowns lead to signal distortion.
• 💥 The exit T-CON TIMING CONTROL – responsible for processing the video signal.

To pinpoint the source of the problem, start with a diagnosis by external signs:

• 🔍 The bands appear only when connected to the HDMI → cable-problem.
• 🔄 Bands are visible on all signal sources (including embedded applications) → firmware failure or hardware malfunction.
• 🌡️ The bands are strengthened when the TV is heated. → Possible overheating of the chip or detachment of the plume.

Method 1: Reset and reset image settings

Start with the simplest, software reboot, and often the bands are caused by a temporary GPU failure, which is solved by a normal restart:

1. Press and hold the Power button for 10-15 seconds until the TV turns off.
2. Turn off power from the socket for 1-2 minutes (this will drop the residual charge in the capacitors).
3. Turn on the TV and check if the lanes are gone.

If the reboot didn’t help, reset the image settings to factory:

1. Go to Settings. → Image: → Additional settings.
2. Select Reset Image Settings and confirm the action.
3. Disable Game Mode functions, HDR Dolby Vision (if active).

Shut it down. HDMI-device|

Record the current brightness/contrast settings|

Check for firmware updates|

Prepare a remote to confirm actions-->

Attention: if the bands appeared after the new device was connected (e.g, NVIDIA Shield or Apple TV), try:

• 🔌 Use the other HDMI-port on the TV (preferably) HDMI 2.0 or ARC).
• 🔄 Switch the permission on the external device to 1920×1080@60Hz (instructions for Xbox: Settings) → Display. → Permission).

Method 2: Update firmware and roll back to stable version

Outdated or "raw" firmware is one of the main reasons for the bands. Xiaomi regularly releases updates to fix bugs with video processing.

1. Go to Settings → About TV → System Update.
2. Click Check Updates and wait for the search to be completed.
3. If a new version is available, install it (the TV will restart automatically).

Critical information: In firmware MIUI TV version 3.0.1–3.2.5 There was a signal processing bug. 4K@120Hz, which led to the bands. If the problem gets worse after the update, roll back.

To return to the stable version:

1. Download the firmware archive for your model from the official Xiaomi website (section) TV Firmware).
2. Unpack the archive and place the update.zip file on the flash drive (FAT32 format).
3. Connect the flash drive to the TV and go to Settings → About TV → Local Update.
4. Select the file and confirm the installation.

If the TV stops turning on or the bands become brighter after the update, perform an emergency reset:

1. Turn off the TV.
2. On the remote, hold the Menu at the same time. + Volume Down.
3. Without releasing the buttons, connect the power and hold for 10-15 seconds.
4. The TV will reboot to Restore Mode – select Wipe Data.

Method 3: Verification HDMI-cables and ports

In 30% of cases, the bars at the bottom of the screen are associated with a faulty HDMI-It's a cable or a port. It's simple:

1. Disconnect all devices from HDMI-television port.
2. Enable the built-in app (like YouTube or Netflix).
3. If the bands are gone, the problem is with one of the external devices or cables.

Then proceed with the algorithm:

• 🔌 Replace. HDMI-High Speed Certified Cable (Version) 2.0 Cheap cables often fail to handle transmission. 4K/HDR.
• 🔄 Try another port if the bands are only on the HDMI 1, but disappear on HDMI 2, port malfunctioning.
• 📺 Set the output resolution on an external device: For PlayStation 5: Settings → Screen and video → Permission → 1080p

Attention, if you're connected to HDMI-The port TV will give a message "No signal" or "Unsupported format", and the bands remain - most likely damaged. T-CON fee (repair required).

💡

Use it. HDMI-Cables marked "Premium Certified" - they are guaranteed to support 4K@60Hz and HDR artifactless.

Method 4: Diagnostics of hardware malfunctions

If the bands remain even after resetting and updating, the problem lies in the hardware.

For self-diagnosis:

1. Connect the TV to another power source (exclude power drawdowns).
2. Lightly press the back cover in the area T-CON The board (usually located in the middle at the top) if the bands change, the contact problem is.
3. Check the TV in a dark room: if the stripes are glowing (even when the screen is black), the backlight or matrix is faulty.

If you do not have experience in electronics repair, it is better to contact the service.The average cost of diagnosis in official Xiaomi centers is 1500-2500 rubles. T-CON The fee will cost 3000-6000 rubles. depending on the model.

Method 5: Alternative solutions (if nothing worked)

If all previous methods have failed, try:

• 🔧 Disabling hardware acceleration (for Android) TV): Settings → Annexes → Special facilities → Deactivate "Hardware acceleration"
• 📱 Use of external media player (e.g. Kodi or VLC) instead of embedded applications.
• 🔄 Fastboot Flashback (only for power users!): Fastboot flash recovery recovery.img fastboot reboot
• 🛠️ Replacement HDMI-port (if the problem is localized in one connector).

Attention! Fastboot flashing can cause a TV to crash (total inoperability) if the wrong version of the software is selected. Use this method only if you are confident in your actions.

💡

Before any firmware manipulations, back up the settings through Settings → System system → Backup.

When should I contact the service center?

There are several signs that indicate the need for professional repair:

• 💥 The stripes are accompanied by the smell of burning or the TV spontaneously turns off.
• 🔧 On the screen, physical damage is visible (cracks, spots, stains, stains).
• 📉 The strips increase in size over time.
• 🔌 The TV does not respond to resetting settings and firmware updates.

Official Xiaomi service centers in Russia offer free diagnostics with a warranty.

• Replacement T-CON fees: 3000-6000 rubles.
• Repair of the power supply: 2000-4000 rubles.
• Replacement of the matrix: 15000-40,000 rubles (depends on the diagonal).

If your TV is warranty, don’t try to repair it yourself – this will void warranty obligations. To check the status of warranty go to the Xiaomi Verify website and enter the serial number (located on the box or in Settings). → On TV).

FAQ: Frequent questions about stripes on Xiaomi screen TV