Step 151. Ibm 6155 Extended Monochrome Graphics Display - IBM RT PC Problem Determination Manual

Step 151. IBM 6155 Extended Mo n och ro me Graphics Display
2-86 Problem Determination Guide
1. Turn off the system unit.
2. Turn the Brightness and Contrast controls fully clockwise.
3. Wait about 1 minute.
DOES THE SCREEN HAVE A LIGHTED BACKGROUND?
YES CONTINUE to next page.
NO Go to "Step 154. IBM 6155 Extended Monochrome
Graphics Display" on page 2-89.