IBM PCjr

Advanced POST Error Table (Part 2 of 4)
POST Error
Problem
Area
What To Do
Page
Advanced
POST, or
portion of it,
goes into loop
System
board
Replace system
board.
4-100-1
No beep.
ERROR OAXX
Memory Replace system
board. Repeat
advanced POST.
If same error,
go to PIC
"Power."
4-100-1
No beep.
ERROR OBXX
Memory Replace 64KB
memory and
display
expansion.
Repeat advanced
POST. If same
error, go to PIC
"Memory."
4-200-1
No beep.
ERROR OCXX
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.
Start 3-000-9