Using a large TV screen for work, watching movies or playing games is significantly more convenient than being limited to a laptop display. Today’s Xiaomi Mi TV and Redmi Smart TVs are equipped with advanced arrays that are ideal for displaying high-quality images from a computer. HDMI is the de facto standard for transmitting high-definition digital signal, ensuring simultaneous broadcast of video and sound without loss of quality.
Unlike older analog methods, digital connectivity allows you to stream audio in 5.1 or 7.1 formats, which is critical for home theaters. However, despite the simplicity of the standard, users often face a lack of image or sound after connecting the cable. In this article, we will discuss in detail how to set up a laptop-TV bundle correctly, choose the optimal resolution and avoid common errors.
Required equipment and port preparation
Before you start setting up, make sure you have a serviceable HDMI-HDMI cable. To transmit a signal in 4K HDR resolution, you need an HDMI 2.0 or later cable labeled High Speed. Older versions 1.4 cables may not be able to handle high frame rate or color depth, leading to a flashing or no screen at all.
Note the location of ports on the back or side of a Xiaomi TV. Often one of the connectors is marked as HDMI (ARC) or HDMI (eARC). To connect a computer, it is recommended to use a port marked ARC, since it often has better compatibility with external signal sources and supports reverse audio. If such a port is not available, any free connector will do.
It is important to check the physical condition of the connectors. Oxidation or dust in the port can cause unstable connection. Blow the connectors with compressed air before inserting the cable. Also make sure that the laptop has the appropriate output; ultrabooks often use Mini HDMI or USB-C, which will require the use of an adapter or special cable.
⚠️ Warning: Never insert or remove the cable HDMI, While devices are on the grid, unless you're sure of grounding the outlets, static electricity can damage the port power controller, resulting in expensive repairs to the TV motherboard or laptop graphics card.
Physical connection and signal source selection
The connection process begins with physically connecting the cable to both devices, inserting one end of the cable into the laptop port and the other into the selected port of the Xiaomi TV, the connection should be tight, without backlashes, then turn on the TV and go to the source of the signal.
On the remote, press the Input button or the button with the arrow square icon (entry). In the MIUI for TV menu that appears on the screen, select the appropriate port, such as HDMI 1 or HDMI 2 (ARC). If the laptop is on, you will immediately see the desktop or the operating system welcome screen.
If the image does not appear automatically, check the projection settings in the operating system. In Windows, this is done through a keyboard or notification bar, and in macOS through the system settings of the displays. The TV should be defined by the system as an external digital monitor.
☑️ Checking the physical connection
Configure image parameters in Windows and macOS
When you see the picture, you need to adjust the display mode. In Windows 10/11, press the Win + P key combination. The side menu will open with the Projection, where four main modes of operation are available. The choice depends on your current tasks: working with documents or watching a movie.
MacOS users should go to System Settings → Monitors. You can adjust the screen layout by simply dragging and dropping thumbnails so that the mouse cursor moves logically as you move from one screen to another. Color calibration is also available on this menu, which is important for designers.
To play games or watch movies in full screen, select "Second Screen Only" mode, which will turn off the laptop matrix, reduce the load on the graphics card and improve performance in resource-intensive applications. The resolution must be set natively, usually 1920×1080 or 3840×2160 for 4K models.
- 🖥️ Duplicate: The image on both screens is the same, convenient for presentations.
- 📺 Expand: TV becomes an extension of the desktop, you can drag and drop windows.
- 🎬 Second screen only: Laptop goes out, only TV works, perfect for movies.
- 💻 Computer screen only: Image on TV goes missing, only laptop works.
Why can the image be fuzzy?
Sound adjustment: audio transmission via HDMI
One of the main problems when connecting is the lack of sound, as by default it often stays on the laptop speakers. To fix this in Windows, right-click on the speaker icon in the tray and select "Open sound settings" or "Sounds."
In the playback list, find your Xiaomi or Redmi TV. It can be displayed by model name or as "NVIDIA High Definition Audio" / "Intel Audio for Displays." Right-click on the device and select "Use by Default."
On macOS, go to System Settings → Sound → Output. Select your TV from the list. If there is no TV in the list of devices, try reconnecting the cable or updating the graphics card drivers, since the sound is transmitted through the video chip.
⚠️ Warning: If you've left your TV as your output device, check the volume level not only on the TV, but also in the Windows Volume Mixer. Sometimes the system automatically lowers the volume of the applications when you switch the output devices.
Permission compatibility table and update frequency
The quality of the image is directly dependent on the bandwidth of the cable and the capabilities of the ports. Below is a table that helps determine which mode of operation to choose for your bundle of equipment. Wrong choice can lead to a black screen.
| HDMI version | Maximum authorization | Update frequency (Hz) | Support for HDR |
|---|---|---|---|
| HDMI 1.4 | 1920×1080 (Full HD) | 60 Hz | No. |
| HDMI 1.4 | 3840×2160 (4K) | 30 Hz | No. |
| HDMI 2.0 | 3840×2160 (4K) | 60 Hz | Yes (HDR10) |
| HDMI 2.1 | 3840×2160 (4K) | 120 Hz | Yes (HDR10+/Dolby) |
If you connect a gaming laptop to a Xiaomi TV, be sure to activate Game Mode in your TV image settings. This will reduce input latency (Input Lag), making game control more responsive. Standard image settings often add post-processing, which increases latency.
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To reduce delay in games, turn on the Xiaomi TV mode "Game" in the image settings and turn off all picture improvements, such as noise reduction and dynamic contrast.
Solving common problems and errors
Often, users are faced with a situation where the TV sees a laptop but writes "No signal" or the image twitches. The first step should always be to check the cable on another device. If the cable is working, the problem lies in the resolution settings or drivers.
Try to reduce the refresh rate of the screen in the graphics card settings. If the graphics card tries to give 60 Hz to 4K through an old cable, the signal may not pass. Decreasing to 30 Hz or 50 Hz often solves the problem temporarily until you replace the cable with high-quality High Speed.
Another common problem is a black screen with sound working, which indicates that handshake HDCP (copy protection) didn't work. Try changing the order of on: first turn on the TV and switch to HDMI, then turn on the laptop.
- 🔄 Update drivers: Go to the video card manufacturer's website (NVIDIA, AMD, Intel) and download the latest driver version.
- ⚡ Power Check: Make sure your laptop is connected to the network, as in economy mode some ports may not work smoothly.
- 📺 Reset TV settings: In the TV menu, reset the image settings to factory ones to exclude software glitches MIUI TV.
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90% of connection problems are solved by replacing an HDMI cable with a High Speed certified cable or updating the graphics card drivers.