Texas Instruments 3000 - Manual (Page 107)

Other Options
1. Turn off power to both the external monitor and the TravelMate 3000.
2. Connect the 15-pin external VGA monitor cable from the external
monitor to the 15-pin connector on the left side panel of the computer.
3. Turn on the TravelMate 3000, then turn on the monitor.
4. At the MS-DOS C:\> prompt type
ALTVID
and press the Enter key to switch the image from the TravelMate 3000 built-in
display to your external monitor.
6-12 TravelMate 3000 Options