IBM PCjr

Advanced POST Error Table (Part 1 of 4)
POST Error
Problem
Area What To Do Page
No beep. No
image or
image on
screen wrong
Power
Go to PIC
"Power."
3-020-1
One beep. No
image or
image on
screen wrong
Display
Go to PIC
"Display."
3-500-1
Two beeps.
No image or
image on
screen wrong
Power
Go to PIC
"Power."
3-020-1
Three beeps.
No image or
image on
screen wrong
Memory Replace 64KB
memory and
display
expansion.
Repeat advanced
POST. If same
error, go to PIC
"Memory."
4-200-1
"X" can be any number.
Before replacing any item, ensure that all internal cables are
correctly connected. Treat replaced items with care. You may
be asked to reattach them.
3-000-8 Start