IBM 6151 Maintenance And Service Manual page 357

Step 5
1. Turn the Brightness Control fully clockwise.
2. Press and hold the Brightness Override Button while answering
the following question.
Brlghtn•••
1/
Override Button
/
BrlDhtne~8S
I /
Power
Control
1/
Switch
/
""-~""~~~~~/~/~/
AJZB211
IS THE DISPLAY SCREEN LIGHTED?
NO Record SRN 26-610; then go to "Step 9" on page 3-6100-9.
YES Continue on the next page.
(6/88) Problem Isolation Charts 3-6100-5