4-12  Chapter 4, Advanced Diagnostics Program 
Addendum 108431-001 (11-88) to 
Manual No. 108033-003
Gray Scale/Color
The Gray Scale/Color selection verifies that the 
system can display as many as 16 shades of the 
gray scale and all 8 possible colors (at 2 intensi-
ties for each). A display similar to Screen 7  
appears on the monitor.
Noise
The Noise selection checks the amount of elec-
tronic noise generated from the video controller; 
it also tests the ability of the controller to  
communicate with the system board.
Screen 7.