IBM 5155 User Manual

31 Turn the Contrast control fully clockwise. Look
at the following examples.
Too Dim
Too Wide Too Narrow
II
Out of Focus Shrunken
Characters shifted left
or right or up and
down off the display
area
Tilted
32 Is the problem similar to one of the examples?
YES - Have your display serviced.
NO - Go to "Diagnostic Testing" on page
Test
000-1 earlier in this section.
9000-12 Test January 1984

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)