IBM 5155 User Manual

17 Is your screen blank?
NO - Go to the next step.
YES - Have the unit that the display was
attached to serviced.
18 Is your screen steady?
YES - Go to Step 21.
NO - Go to the next step.
19 Turn the Vertical Hold control clockwise as far
as it
will go, then turn it counterclockwise until
the screen stops rolling and
is steady.
Vertical Hold
Control
January 1984
Test 9000-7

IBM 5155 Specifications

General

Model	IBM 5155
Category	Desktop
Release Year	1984
CPU	Intel 8088
Clock Speed	4.77 MHz
Display	9-inch monochrome CRT
RAM	256 KB, expandable to 640 KB
Storage	One or two 5.25" 360KB floppy disk drives
Graphics	CGA (Color Graphics Adapter)
Ports	Parallel, Serial, Keyboard
Operating System	IBM PC DOS
Weight	30 pounds (13.6 kg)