IBM 3270 Hardware User's Guide

Step 3. Find Your Problem in the
POST Error Chart
Symptom
1
2
3
Start with symptom number one in the chart.
Look at the screen and audio responses. If they
do not match what you saw and heard during the
POST, look at the rest of the symptoms in order
until you find the symptom that you saw and
heard. When you have found your symptom,
follow
the instructions in the last column.
POST Error Chart
If Your Screen And You Then
Looks Like This: Heard: Do This:
Blank or an
No
Go to "Step 4. Do the External
incorrect display
. beep
Device
Check" on page 5-15 .
Amount of memory Correct The system unit or the keyboard
is missing or audio adapter cable has a problem.
wrong.
The screen response
l
Report the problem or have them
"is not blank. serviced to fix the problem.
One of the following: 1 beep The system unit
2
or the keyboard
•
or
adapter cable has a problem.
Correct display,
correct
Report the problem or have
but no cursor
audio them serviced to fix the
•
Cursor only2
response!
problem.
•
Cursor in the
wrong position
•
Cursor in
reverse video
Chart continues on next page.
1 A correct audio response is one beep, a pause, and then
a second beep when the diagnostic program is loaded.
2 A non-system diskette or a faulty diskette in your
diskette drive could be the cause of the problem.
Remove
all diskettes from the drives and rerun the
POST.
Chapter 5. Locating Problems with Your PC Units 5-11

IBM 3270 Specifications

General

Brand	IBM
Model	3270
Category	Desktop
Language	English