IBM RT PC 10 Hardware Maintenance And Service page 89

Step 21
Turn the Brightness and Contrast controls fully clockwise.
DIAGNOSTIC OPERATING INSTRUCTIONS
DIAG-l
This diskette contains diagnostics and util ities for your system. You
shoul d use these procedures whenever you are havi ng problems with your sys tem
which have not been corrected by any software application procedures available.
In general, the procedures will run automatically. However, sometimes you will
be required to select options, tell the system when to continue, do simple
tasks, and exchange di skettes.
Severa 1 keys are used to control the procedures:
- The Enter key continues the procedure or performs an action.
- The End key s tops a tes t or an action.
- The FlO key returns to the previ ous menu and cancels any changes.
- The Escape key resets the procedures and returns to these i nstructi ons.
- The Page Down key allows a 1ist to be scrolled forward.
- The Page Up key allows a 1ist to be scrolled backward.
- The Backspace key allows keyi ng errors to be corrected.
Press Enter to continue.
ARE THE "DIAGNOSTIC OPERATING INSTRUCTIONS" DISPLAYED
CORRECTLY?
3-44 Service Manual
YES
NO
Set the Brightness and Contrast controls to the desired level. This
completes the repair.
Continue on the next page.