Computer Monitor troubleshooting steps

1. First of all check if the power supply to the monitor is ON. In old type of computers the power supply is given in the CPU but in recent computers the monitors have own power cable.. Check if it is fixed correct and If the switch is on. If the power supply comes to the monitor the LED will glow in the monitor. Otherwise it does not glow.

2. After that you have a switch control in monitor for adjusting the monitor setting. You can adjust to get display. Children may change the settings mistakenly. We can check it out.

3. After that check whether video cable is connected to the CPU firmly.

4. If you have any other monitor you can connect with CPU by using the same video cable and also the problem continuous that means the video cable has a problem.

5. If you can connect your monitor with another CPU then we decide the problem is in your monitor. You have to change your monitor or repair the monitor by the technician.

6. When booting the computer the monitor that is identified maybe incorrect then we decide the problems in your display card. Try to change the monitor driver if you have the CD. Or change the video card. 

After fixing new display card, if the problem continues then change your monitor.