Toshiba Satellite U840 Maintenance Manual page 106

Subtest 02 640*480 Mode Display
This subtest uses 640*480 video resolution to display a high resolution white
frame, 256 letter types (8*16 pixels) and 64 gradations of white, red, green,
and blue as shown below.
[ 640*480 256 ]
0---+---1---+---2---+---3---+---4---+---5---+---6---
WHITE
RED
GREEN
BLUE
To exit this subtest and return to the High Resolution Display Test menu:
Press Enter if NO was selected for Test Loop on the Test Parameter Menu.
Press Ctrl + break if YES was selected for Test Loop on the Test Parameter
Menu.
44
64 gradations
64 gradations
64 gradations
64 gradations
Satellite U840 Tests and Diagnostics Manual
Test Program for Field.
Press [ Enter ]key
256 letter
types
indication