IBM 5155 - Page 53

Power-On Self Test (POST)
1 Turn the Brightness and Contrast controls fully
clockwise.
After the first screen is displayed
adjust the controls for eye comfort.
D
2 Set the Power switches on all external devices to
On.
3
If the expansion unit is attached, set its Power
switch
to On.
4
Set the system unit's Power switch
to On.
January
1984
Start 30-1