When a computer is connected to a TV using an HDMI cable, if the screen cannot be projected, you can try the following steps to solve this problem:
Check the HDMI cable connection:
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- Ensure that both ends of the HDMI cable are fully plugged into the HDMI ports of the computer and TV, without any loose or loose connections.
- Check if the HDMI cable is damaged or worn, as sometimes poor quality or aging of the cable can also cause connection problems.
- Try replacing the HDMI cable with a new one to see if it can solve the problem.
Check the TV HDMI interface:
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- Ensure that the HDMI interface on the TV is not physically damaged or dirty, as these factors may affect the connection.
- If the TV has multiple HDMI ports, try connecting the HDMI cable to different ports to see if the problem can be solved.
Check computer settings:
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- Open the computer’s display settings and ensure that the connected TV is correctly recognized.
- Try adjusting the resolution and refresh rate, sometimes mismatched settings can cause screen mirroring failure.
- If the computer is a laptop and connected to an external monitor, make sure to select “Expand these monitors” or “Copy these monitors” in the display settings.
Check the TV signal source:
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- Use the TV remote control to switch to the correct HDMI signal source input. Usually, televisions have multiple HDMI ports, and it is necessary to select the signal source corresponding to the HDMI port connected to the computer.
Update drivers and operating system:
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- Ensure that the graphics card driver of the computer is up-to-date and can be updated through the device manager or the official website of the graphics card manufacturer.
- Check for updates to the operating system, sometimes system updates can solve compatibility issues with hardware connections.
Try other connection methods:
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- If none of the above methods work, you can try using other connection methods, such as wireless screen mirroring or using other types of cables (such as VGA or DisplayPort) for connection.
Contact technical support:
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- If none of the above methods can solve the problem, it is recommended to contact technical support for computers or televisions for professional help and solutions.
Please be patient during the resolution process and follow the steps to troubleshoot the problem one by one. At the same time, ensure that all devices and cables are in normal working condition and connected correctly.