Display Picture Appears Too Bright or Dark.
The display picture appears too bright or too dark when there is a problem with the brightness or contrast.
To solve the problem:
1. Adjust the brightness settings using the control on the front panel.
2. Adjust the contrast settings using the control on the front panel.
3. Switch the lights off to check the brightness is not causes due to the lighting in the room.
4. Try using an antiglare screen.
There is no display picture on the screen.
The display picture does not appear on the screen if the monitor is not receiving signals from the system or the monitor is defective.
To solve the problem.
1. Press a button on the keyboard or move the mouse to wake the system if it is the standby mode.
2. Switch the monitor off and then switch it on again.
3. Increase the brightness and contrast.
4. Press the power supply cable and the signal cable firmly in the sockets.
5. Reboot the system.
6. Use POST of the monitor to check that the monitor is working.
7. Troubleshoot the video adapter.