NEC LS2400, Руководство пользователя, Страница: 114 / 186

5-10 Problem Solving
No Characters Appear on Screen
Check the following:
!
Is the keyboard working? Check to see if the Num Lock light is functioning.
!
Is the video display monitor plugged in and turned on?
!
Are the brightness and contrast controls on the video monitor properly
adjusted?
!
Are the video monitor switch settings correct?
!
Is the video monitor signal cable properly installed?
!
Is the onboard video controller enabled?
If you are using an option video controller board, perform the following:
1. Verify that the video controller board is fully seated in the system board
connector.
2.
Run the SSU to disable the onboard video controller.
3. Reboot the system for changes to take effect.
If there are still no characters on the screen after you reboot the system,
contact your service representative or authorized dealer for assistance.
POST emits one long beep and two short beeps pattern to indicate a possible
problem with the video display controller. If you do not receive a beep pattern
and characters do not display, the video display or video controller may have
failed. Contact your service representative or authorized dealer for assistance.
Characters are Distorted or Incorrect
Check the following:
!
Are the brightness and contrast controls properly adjusted on the video
display? Refer to the documentation supplied with your video display.
!
Are the video monitor signal and power cables properly installed?
!
If the problem persists, the video monitor may be faulty or it may be the
incorrect type. Contact your service representative for assistance.