Example 3: Detecting the bad point of the LCD display
Buying an LCD monitor taboo has highlights or dark spots, we can assist in viewing with relevant testing software, but bosses often do not allow us to install software, in fact, using the F command in Debug, you can see clearly !
In order to detect if there is a bad point in the LCD screen, you can fill the entire screen as solid color, green, blue, white, etc. to check. Here is a few commonly used display detection F commands (the debug window is generally smaller, press Alt Enter to enlarge it throughout the screen):
F B800: 00 F9F 20 70 full screen white F b800: 00 f9f 20 40 full screen red F B800: 00 F9F 20 20 full screen green F b800: 00 f9f 20 10 full screen blue F B800: 00 F9F C5 07 C4 07 full screen white cross network F9F C5 04 C4 04 full screen red cross grid F B800: 00 F9F C5 02 C4 02 full screen green cross grid F B800: 00 F9F C5 01 C4 01 full screen blue cross grid
