When the host has started but the monitor has no signal and the keyboard is not responding, it may be caused by various reasons. Here are some steps to troubleshoot and solve this problem:
1. Check the connection between the monitor and the host: - Ensure that the monitor power cord is properly connected and powered on- Check if the video cables (such as VGA, HDMI, DP, etc.) between the monitor and the host are securely plugged into the interfaces at both ends- Try replacing the video cable or connecting to another video interface on the host (if there are multiple on the host).
2. Check keyboard and mouse: - Ensure that the power cords (if wired) of the keyboard and mouse are properly connected- For wireless keyboards and mice, check if the battery is fully charged and ensure that the receiver is properly connected to the host- Try connecting the keyboard and mouse to another computer to confirm that they are working properly.
3. Check the host hardware: - Confirm that the host power is correctly connected and powered on- Check if key components such as CPU, memory module, and graphics card (if it is a discrete graphics card) are installed correctly and not loose- Try unplugging the memory module again, sometimes improper installation or dirty memory can cause such problems.
4. Check monitor settings: - If using a multi monitor setting, try pressing the "Input Select" button on the monitor to ensure that the correct input source is selected- Check the brightness and contrast settings of the monitor to ensure they are not set to the lowest.
5. Check BIOS/UEFI settings: - If possible, try entering the BIOS/UEFI settings interface (usually accessed by pressing F2, Delete, or Esc keys at startup)- Check the video output settings in BIOS/UEFI to ensure they are compatible with your monitor and video cable- If it is not displayed in BIOS/UEFI, it may be a hardware failure, such as a graphics card or motherboard issue.
6. Using diagnostic tools: - If your motherboard is equipped with diagnostic LEDs or buzzers, they may provide codes or sounds about hardware faults- Use the motherboard manual or online resources to interpret these codes or sounds.
7. Consider power supply issues: - Insufficient or damaged power supply may also cause such problems. Try using another reliable power supply for testing.
8. Contact technical support: If none of the above steps solve the problem, it may be necessary to contact the computer manufacturer or professional technical support for further assistance.
Be cautious when dealing with computer hardware, especially when it comes to internal components. If you are unsure how to operate, it is best to seek professional help.