IBM 6151 Maintenance And Service Manual page 339

IBM 6154 Advanced Color Display PIC 5900
Use this PIC to get an SRN when there is a problem that prevents
you from reading the display screen easily, the two-digit display is
blank, and the power-on indicator is on.
Step 1
Be sure the Power On and Brightness Control is set to On.
IIIK
*
0
~
. /
I
AJZB205
IS THE DISPLAY POWER-ON INDICATOR ON?
NO Go to "Step 4" on page 3-5900-4.
YES Continue on the next page.
(6{88) Problem Isolation Charts 3-5900-1