Attaching an External Monitor
Important
Do not disconnect the external monitor while the computer is in
suspend mode or hibernation mode. If no external monitor is
attached when the computer resumes, the LCD remains blank
and output is not displayed. This restriction does not depend on
the resolution value.
The DOS Screen Image on the LCD
If you use a DOS application that supports only VGA mode
(640x480 resolution) with your computer, the screen image might
appear smaller than the display size, as shown:
640 x 480
This is to maintain compatibility with DOS applications. To
expand the screen image to the same size as the actual screen,
you can use the
screen expansion
function. You can expand the
screen image by clicking on the LCD button (
) in the
ThinkPad Configuration program and enabling the radio button for
Screen Expansion and clicking OK. However, the image might
look slightly distorted.
Display Modes
The ThinkPad 390X computer has an LCD that supports an XGA
(1024x768 resolution) video mode or an SVGA (800x600 resolution)
video mode. The following table shows the various display modes
(resolution and color depth) available with your computer or external
monitor. Use this table to set the display output (LCD, External
Display or LCD+External Display).
Note: When installing an operating system, you must install the
display driver supplied with the computer to use SVGA mode.
Extending the Features of Your Computer 71
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