Toshiba M40 - Manual (Page 112)

3 Diagnostic Programs 3.8 Video
In the test, user is required to respond according to the instruction in the screen.
Subtest 02 640 * 480 VGA Mode
This test item is to check whether 680*480 VGA Text mode works normally.
In the test, user is required to respond according to the instruction in the screen.
Subtest 03 VESA Video Modes
This test item is to check whether all the video modes supported by the video card
works normally.
In the test, user is required to respond following the instruction in the screen.
46 EQUIUM M40/M45/ Satellite M40/M45 Maintenance Manual