How to Turn on 4K on Xiaomi TV: A Complete Guide to Typical Problem Solutions

Xiaomi TVs with support 4K Ultra HD (3840×2160) They offer stunning image clarity, but many users face a problem: the screen stubbornly shows Full. HD or 1080p, Despite the fact that modern devices are connected, the reasons may lie in the wrong settings of the TV itself, outdated firmware, incompatible. HDMI-cable or even signal source limitations, and in this article we'll look at all the ways you can activate the signal. 4K on Xiaomi Mi TVs TV 4/4A/4S/4X/5/5X, Redmi Smart TV and other models – from basic check connectors to hidden engineering menus.

It is important to understand that a simple resolution switch in settings often does not work due to automatic settings. HDMI. For example, if you have a PlayStation connection. 5 Apple TV 4K, But the TV still gives out. 1080p, The problem may be in the version. HDMI-High Speed or Premium Certified cables 4K@60Hz) or in the source settings. We've tested all methods on current firmware. 2026 Years – including hidden options not mentioned in the official instructions.

1. Compatibility Check: Does your Xiaomi TV support 4K?

Before you adjust the resolution, make sure your Xiaomi model is physically capable of playing 4K. Not all of the brand’s TVs support Ultra HD – for example, the budget Mi TV 4A 32 series or Redmi Smart TV 32 series are limited to 1366×768.

• 🔍 Model TV: Find a sticker on the back (for example, L32M6-6ARU for Mi TV 4A 32"). The first digits after the letters indicate the diagonal, and the suffixes (Pro, Max) indicate support. 4K.
• 📺 Specifications: Type the model into a search engine with a “specs” request (e.g., “Xiaomi Mi”) TV 5X 55 Search for the line “Maximum Resolution” – should be specified 3840 × 2160.
• 🔧 TV menu: Go to Settings → On TV. → Technical information: If the "Screen resolution" section 1920×1080, Your TV doesn't support you. 4K.

Critical detail: Xiaomi 4K TVs always have an "X" (e.g. Mi TV 4X) or a "5" (Mi TV 5) in their models. Models with or without the letter "A" (4A) are most often limited to Full HD.

If your model doesn’t support 4K, further tweaks are useless, in which case consider upgrading to Mi TV Q2 or Redmi Smart TV X – they offer the best price/quality ratio in Xiaomi’s lineup for Ultra HD.

Verification HDMI-Port and cable: why 4K may not work

The most common reason for absence 4K — inconsistent HDMI-Even if it looks like a high-speed cable, it doesn't guarantee support. 4K@60Hz. Here's how to diagnose a problem:

• 🔌 Version. HDMI-cable: For 4K frequent 60 Hz need cable. HDMI 2.0 Or newer. Old cables. HDMI 1.4 maximum 4K@30Hz or 1080p@60Hz.
• 🏷️ Certification: Look for "High Speed" or "Premium Certified" labeling on the package.Cables without labeling are often restricted 1080p.
• 🔄 Port port HDMI on TV: On Xiaomi TV Only one port will support one port. 4K@60Hz (usually) HDMI 1 or HDMI 2 marked «ARC» or «4K»). Connect the device to it.
• 🎮 Signal source: Make sure your device (set-top box, game console, PC) is configured to output 4K. For example, on PlayStation 5 you need to manually select the resolution in the screen settings.

How to check the version HDMI-- Can you connect it to the exiting PC? HDMI 2.0 Check the maximum resolution in the settings Windows/macOS. If only available 30 Hz 3840×2160 — cable.

⚠️ Attention: Cheap cables from AliExpress often do not meet the declared characteristics. 4K It was the problem, not the TV.

3. Set up 4K resolution in the Xiaomi TV menu

If the hardware is fine, we'll go to software settings. Xiaomi TVs have two levels of resolution settings: automatic (recommended) and manual. Here's how to set them up:

Method 1: Automatic determination (recommended)

1. Open Settings → Display and sound → Screen resolution.
2. Select the item "Auto" (or "Recommended").
3. Restart the TV (hold the power button on the remote for 5 seconds).

Method 2: Manual permission setting (if the automatic mode does not work):

1. Go to Settings → Display and Sound → Additional → HDMI resolution.
2. Select 3840×2160 (4K UHD).
3. Under the Update Frequency section, set 60Hz (if available).
4. Save the settings and confirm the changes.

If the screen turns black after these actions or if the message “Unsupported format” appears, then:

• 🔌 cable or port HDMI Do not support the selected permission.
• 🖥️ The signal source (e.g. PC) is not configured to output 4K.
• 🔄 You need to update the firmware of the TV (more about this in the next section).

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After inclusion 4K Image "twitches" or loses sound, try to reduce the frequency to 30 Hz or turn on the mode "PC Mode" in settings HDMI-port.

4. firmware update: why 4K might not work without it

Outdated firmware is a common cause of 4K problems on Xiaomi TV. The manufacturer regularly releases updates that fix compatibility errors with new devices (such as the PS5 or Xbox Series X).

Method 1: Automatic updates via the Internet

1. Connect the TV to the network via Ethernet cable (Wi-Fi can interrupt the download).
2. Go to Settings → About TV → System Update.
3. Click on “Check Updates” and wait until it is completed.
4. After installation, the TV will restart automatically.

Method 2: Manually installing firmware via USB (if the automatic update doesn’t work):

1. Download the latest firmware for your model from the official Xiaomi website (choose the “Global” or “EEA” region).
2. Unpack. ZIP-archive and copy the file update.zip on a flash drive formatted in FAT32.
3. Put the flash drive in. USB-TV port and go to Settings → On TV. → Update through USB.
4. Select a file and confirm the installation. Do not turn off the TV during the process (it can take up to 10 minutes).

⚠️ Warning: If after the update the TV hovers on the Xiaomi logo, reset to factory settings (hold Menu). + Volume Down on the remote when you turn it on. This will solve the problem 90 percent of the time.

5. Hidden settings: engineering menu for forced 4K turn on

If the standard methods do not work, you can try to activate the system. 4K This method is suitable for experienced users and can help in cases where the TV "cannot see" 4K-signal due to program constraints.

How to open the engineering menu on Xiaomi TV:

1. Turn on the TV and on the standard remote press sequentially: Menu → Up. → Up. → Down. → Down. → Left. → Right. → Left. → Right. → Up (codes may differ for different models).
2. The menu will open with tabs “Picture”, “Audio”, “Option”.
3. Go to Option → HDMI Mode and set the option “4K@60Hz” or “Enhanced”.
4. Save the settings (usually by the “OK” button) and restart the TV.

Warning: Unknown settings in the engineering menu can disrupt the TV. Do not change settings unless you are sure of their purpose. For example, changing the settings "Panel Type" or "Backlight" can cause the matrix to break.

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The engineering menu is the last chance to turn on 4K if other methods have failed, but only use it when you are confident in your actions or according to customer service instructions.

6. Solving 4K issues on popular devices

Often the problem is not the TV, but the source of the signal.

If you connect a PC or laptop, check the graphics adapter settings:

• 🖥️ Windows: Parameters → System system → Display. → Additional display parameters → 3840 × 2160.
• 🍎 macOS: System settings → Monitors → Scaling → 4K.

7. Frequent errors and their correction

Even after all the settings, 4K may not work due to specific errors.

• 🔴 Error: “Unsupported format” Reason: The signal source sends a resolution that does not support the TV (e.g., the TV, 4K@120Hz on the model without 120 Solution: In source settings (PC, console) limit the maximum resolution to 4K@60Hz.
• 🔴 Error: “No signal” when connecting Reason: Incompatible HDMI-Solution: Try another cable (preferably labeled "Premium") HDMI») port on the TV.
• 🔴 Mistake: 4K It works, but it doesn't. HDR Reason: HDR demand HDMI 2.0a or later, and the option enabled in the TV settings. Solution: Go to Settings → Display and sound → HDR and activate the mode.
• 🔴 Error: Image twitches or lags Reason: Update frequency is set at 60 Hz, but cable or port does not support this frequency for the user. 4K. Solution: Install 30 Hz or replace the cable with a certified one HDMI 2.1.

⚠️ Note: On Xiaomi TVs with an Amlogic processor (e.g. Mi) TV 4X) When you connect a PC, you can use protection against "non-standard" permissions, and then you can use the switch on mode «PC Mode" in settings HDMI-port.

FAQ: Answers to Frequent Questions