Specifications

Specific Problems and Corrective Actions
007-4276-001 79
No Characters Appear on Screen
Check the following:
• Is the keyboard working? Check to see that the “Num Lock” light is functioning.
• Is the video monitor plugged in and turned on? Many modern video monitors shut
down when inactive and may require a moment to warm up when activated.
• 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 add-in video controller board, follow these steps:
1. Verify that the video controller board is fully seated in the baseboard connector.
Also verify that the video monitor is plugged in to the active video controller.
2. Reboot the system so that changes take effect.
3. If there are still no characters on the screen after you reboot the system and POST
emits a beep code, write down the beep code. This information is useful for your
service representative. See “Error and Informational Messages” on page 82.
4. If you do not receive a beep code and characters do not appear, the video display
monitor or video controller may have failed. You can verify this by trying the
monitor on another system or trying a different monitor on this system. Contact
your service representative or authorized dealer.
Characters Are Distorted or Incorrect
Check the following:
• Are the brightness and contrast controls properly adjusted on the video monitor?
See the manufacturer's documentation.
• Are the video monitor signal and power cables properly installed?
• Is the correct monitor/video board installed for your operating system?
Iftheproblempersists,thevideomonitormaybefaultyoritmaybetheincorrecttype.
Contact your service representative or authorized dealer.