1. Check the power supply
One of the most common causes of a blank monitor is that the power supply to the computer has been turned off, or disconnected. It is important to check the connections to make sure that the power cable is securely connected to the back of the computer case, and that the outlet is providing power to the device.
2. Check the video cable
If the power supply is connected, it is important to make sure that the video cable is securely attached to both the monitor and the back of the computer case. Make sure that there are no loose connections or breaks in the cable. If possible, try using a different video cable to see if that solves the problem.
3. Reset the computer
If the power and video cables appear to be connected properly, it may be necessary to reset the computer. This can be done by turning the power switch off, unplugging the power cord from the wall outlet, and waiting for about 30 seconds. After this time period, plug the power cord back into the wall outlet and turn the power switch back on.
4. Check the monitor settings
If the computer boots up properly but the display remains blank, it may be due to incorrect monitor settings. To fix this issue, enter into the computer’s display settings and make sure that the right resolution and color settings are selected.
5. Check the video card
If the display settings appear to be correct but the display still remains blank, the issue may be related to the video card. Try reseating the video card and making sure that the driver is up-to-date. If the video card is not working properly, it may be time to invest in a new one.
6. Perform a hardware test
If all of the above steps have been taken and the display still remains blank, it may be time to perform a hardware test to make sure that all of the components are working properly. Many computers come with a diagnostic program that can be used to check for any hardware errors. If the hardware test does not reveal any errors, the computer may need to be serviced by a professional technician.