IBM 6150 Hardware Maintenance Manual page 236

Step 3
TNL SN20-9843 (03-27-87) to 75X0152 or 75X0166
1. Set the power switch on the system unit to On.
2. Wait about 4 minutes.
3. Try to set the Power On and Brightness Control to the desired level,
then answer the following question.
D
....
......
"""I"
~
\
WERE YOU ABLE TO ADJUST THE DISPLAY TO THE DESIRED
LEVEL?
YES Go to "Step 5" on page 3-5900-5.
NO Record SRN 26-590-450, the go to "Step 7" on page 3-5900-7.
(3/87) Problem Isolation Charts 3-5900-3