After the computer is turned on, the screen shows no signal input, which may be caused by various reasons. Here are some common reasons and their solutions: 1. Hardware connection issues
1. Monitor not powered on: - Check if the monitor power cord is securely plugged in to ensure that the power outlet is functioning properly.
2. Data cable connection issue: - Check if the data cables (such as VGA, HDMI, DP cables) connecting the computer host and monitor are securely plugged in, without looseness or damage- Try replacing the data cable or connecting it to a different interface to eliminate the possibility of data cable failure. 2、 Computer host issue
1. Graphics card issue: - If using a discrete graphics card, try unplugging the graphics card again to ensure a tight connection between the graphics card and the motherboard- Clean the dust on the golden fingers of the graphics card, gently wipe them with an eraser, and then reinsert them- If possible, try connecting the graphics card to another computer to check if the graphics card is damaged.
2. Memory module issue: Poor contact of the memory module is also a common cause. Try unplugging the memory module, wiping the gold finger with an eraser, and then reinserting it- If there are multiple memory modules, you can try inserting only one memory module for a boot test to determine if any memory module is damaged.
3. Motherboard issue: - Motherboard failure may also cause the monitor to have no signal. If the above methods are ineffective, it may be a problem with the motherboard- At this point, it is recommended to send the computer to a professional computer repair shop for inspection and maintenance. 3、 Display issue
-Monitor malfunction: If the problem persists after replacing the data cable, checking the graphics card and memory module, it may be due to a malfunction in the monitor itself- Try connecting the monitor to another computer to check if the monitor is working properly. 4、 Other possible reasons
1. Setting the resolution too high: - If the resolution of the computer is set too high and exceeds the support range of the monitor, it may also cause the monitor to not display properly- Attempt to enter safe mode and adjust the resolution to an appropriate value.
2. Graphics card driver issue: If there are errors, damages, or incompatibility in the graphics card driver program, it may also cause the monitor to have no signal- Try reinstalling the graphics card driver to resolve the issue.
3. Insufficient power supply: If the power supply of the computer is insufficient to meet the hardware requirements, it may also cause the monitor to have no signal- Check if the power supply can provide sufficient power to support the normal operation of all hardware. 5、 Solution steps
1. Check hardware connections: Ensure that all cables are connected correctly and securely.
2. Check the monitor: Confirm that the monitor is powered on and working properly.
3. Check the graphics card and memory module: Re plug and unplug the graphics card and memory module, clean the golden fingers.
4. Adjust resolution and driver: Try adjusting the resolution or reinstalling the graphics card driver.
5. Check the power supply: Ensure that the power supply is sufficient and stable.
6. Sending for repair: If none of the above steps can solve the problem, it may be due to a malfunction in the motherboard or other hardware. It is recommended to send for repair.
Through the above steps, the problem of no signal on the screen after most computers are turned on can be solved. If the problem persists, it is recommended to seek professional technical support.