Toshiba 960-809 Manual Do Utilizador

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  Tests and Diagnostics  
 
 
PORTEGE M780 Maintenance Manual (960-809) 
[CONFIDENTIAL] 
3-175 
3.35.6.4   Display test 
Move the highlight bar to the subtest you want to execute and press Enter
 
1) VRAM Read / Write for VGA 
This subtest writes the constant data (AAAAh and 5555h) to the video RAM. The data is 
read and compared to the original data. 
 
2) Gradation for VGA 
This subtest displays four colors: red, green, blue and white from left to right across the 
screen from black to maximum brightness. 
 
3) Gradation for LCD 
This subtest displays bands of gradations for mixed colors, then for red, green, and blue. 
Next, it displays eight solid colors full screen: red, semi-red, green, semi-green, blue, semi-
blue, white, and semi-white. Each color displays for three seconds. 
 
4) Gradation & Mode test for VGA 
This subtest displays gradations for following modes. To change the mode, press Enter
It automatically judges vesa mode supported by each mode and displays gray levels for as 
many modes as possible. 
 
Resolution Screen 
Mode 
1024 X 800 
12, 13, 3, 111, 112, 114, 115, 117, 118, 165 
 
5) All dot on / off for LCD 
This subtest displays an all-white screen then an all-black screen. The display changes 
automatically every three seconds, then returns to the DISPLAY TEST menu.