The display displays "PC no signal" problem is usually caused by connection, setup, or power failure and is not hardware damage. 1. Check whether the connection cable is plugged in properly, confirm that you use cables that support video transmission (such as HDMI, DP, DVI), re-plug or replace the cable test; 2. Confirm whether the monitor input source is correct, switch to the corresponding interface through the "Menu" or "Source" buttons, and notebook users need to press Win P to select the display mode; 3. Check whether the computer is turned on normally and output signals, observe the host status, try the automatic display detection function of the monitor, and the desktop computer can re-plug or replace the graphics card slot; 4. Update the driver or reset the BIOS settings, enter safe mode to uninstall the graphics card driver, or restore the default settings of the BIOS. Users of dual graphics card need to confirm that the output graphics card settings are correct. Follow the above steps to check one by one, and most problems can be solved.
The problem of "PC no signal" on the monitor is actually very common. In most cases, it is not that the computer or monitor is broken, but that the connection, setup or power supply problems cause the signal transmission to be interrupted. Next, I will talk about common reasons and corresponding solutions in several aspects.

Check if the connection cable is plugged in
This is the easiest place to go and the simplest checkpoint.
- Confirm the cable type : Currently, the mainstream ones include HDMI, DP, and DVI. Make sure you use cables that support video transmission (for example, some USB cables can only be charged).
- Re-plug and unplug once : Sometimes it seems to be plugged in, but in fact it is poor. This problem is more likely to occur when using adapters.
- Try changing the wire : If there is an extra wire at hand, you can change it to see if the signal is restored.
Confirm that the monitor input source is selected correctly
Many monitors have multiple interfaces, but the one you are using may not be selected by default.

- Find the "Menu" or "Source" buttons on the monitor and switch the input source, such as switching from HDMI 1 to DP or other options.
- If it is an external monitor of the laptop, remember to press the shortcut key (usually Win P) to select the extension mode or copy mode.
Check whether the computer is turned on normally and output the signal
Sometimes you think the computer is running, but it actually doesn't really start successfully.
- Observe the indicator lights and fan sound of the host to confirm that the computer has indeed turned on normally.
- Try pressing the monitor's automatic detection function (if any) to see if the signal can be recognized.
- If it is a desktop computer, you can try to remove the graphics card and plug it in again, or replace the PCIe slot to test.
Update driver or reset BIOS settings
System-level problems may also lead to no signal output.

- Enter safe mode, uninstall the current graphics card driver, and then restart to let the system automatically install the basic driver.
- If you have recently moved the BIOS settings, such as turning off the integrated graphics card, you can try to restore the default settings (usually press Del or F2 to enter the BIOS when powering on).
- For dual graphics card users, check whether the correct graphics card is set for output (can be set in the NVIDIA control panel).
Basically these common situations. You can check it step by step in order, and it can be done most of the time. If it is not complicated but is easy to ignore, such as selecting the input source incorrectly or not plugging the line tightly, it is most likely to spend more time.
The above is the detailed content of PC no signal to monitor. For more information, please follow other related articles on the PHP Chinese website!

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