Dell Latitude D630 User's Guide - Page 129
If only part of the display is readable, Video
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RU N T H E VI D E O D I A G N O S T I C S T E ST S - If no error message appears and you still have a display problem, but the display is not completely blank, run the Video device group in the Dell Diagnostics. If the problem persists, contact Dell (see "Obtaining Assistance" on page 193). SEE "ERROR MESSAG ES" - If an error message appears, see "Error Messages" on page 110. If only part of the display is readable CONNECT AN EXTERNAL MONITOR - 1 Shut down your computer and connect an external monitor to the computer. 2 Turn on the computer and the monitor and adjust the monitor brightness and contrast controls. If the external monitor works, the computer display or video controller may be defective. Contact Dell (see "Obtaining Assistance" on page 193). Troubleshooting 129