IBM 5150 Manual To Operations page 193

2.
What's going to happen when you position the System Unit
switch to ON?
• You will see something on the screen.
Maybe
Maybe
Maybe nothing
16M PEn COMP
C C
• You will hear something from the System Unit.
Maybe 1 short Maybe 1 long beep Maybe nothing
beep 1 short beep
• Make note of what you will see and hear.
The normal three responses are:
1. Cursor will appear on screen in approximately 4
seconds.
2. One short beep will be heard after memory is tested.
3. IBM Personal Computer will appear on the screen.
• Position System Unit power switch to ON.
• Turn brightness and contrast knobs fully clockwise (CW).
POPs 4-5