POST Error Codes and Messages List
NOTE: To diagnose a problem, first find the BIOS error messages or codes in left
column. If directed to a check procedure, replace the FRU indicated in the check
procedure. If no check procedure is indicated, the first Action/FRU listed in right
column is the most likely cause.
BIOS Error Codes, Messages
Action/FRU
0111
ISA adapter card
I/O Parity Error
System board
0127
Check CPU speed and system board DIP switches.
CPU Clock Mismatch
See 'System Board Jumpers and Connectors'
for 'Machine Type 2139'
for 'Machine Type 2153/K6'
for 'Machine Type 2153/Celeron'
---
for 'Machine Type 2158'
for 'Machine Type 2163'.
System board
0151
Enter BIOS Setup and load the default settings.
Real Time Clock Error
CMOS battery.
0161
System board.
CMOS Battery Bad
0162
CMOS Checksum Error
0162
Ensure the system configuration set in BIOS Setup is correct.
Equipment Configuration Error
See 'BIOS Setup Utility'
Enter BIOS Setup and load the default settings.
CMOS battery.
System board.
0163
Ensure the time set in BIOS Setup is correct.
Date and Time Incorrect
See 'Date and Time'
CMOS battery.
0164
Insert the memory modules in the DIMM sockets properly,
Memory Size Change
then reboot the system.
0201
Memory module.
Memory Error at MMMM:SSSS:OOOOh
See the 'Step 005 of 'Memory' to replace memory module.
System board.
301
Re-connect PS/2 keyboard and mouse.
PS/2 Keyboard Error or
Enter BIOS Setup and load the default settings.
Keyboard Not Connected
PS/2 keyboard
303
PS/2 mouse
PS/2 Keyboard Interface Error
System board
0662
Onboard Floppy Drive I/O Address
Conflict(s)
0662
Onboard Floppy Drive DMA Conflict(s)
0662
Onboard Floppy Drive IRQ Conflict(s)
Enter BIOS Setup and load the default settings.
Remove all adapter cards that are NOT factory-installed,
then reboot the system.
0662
Diskette drive cable/connection.
Floppy Disk Controller Error
Diskette drive.
0662
System board
Floppy Drive A Error
0662
Floppy Drive B Error
0648
Ensure that the diskette drive is not set to [Write Protected]
Floppy Drive(s) Write Protected
in the Security Options in BIOS Setup.
Load default settings in Setup.
0962
Enter BIOS Setup and load the default settings.
Onboard Parallel Port
Remove all adapter cards that are NOT factory-installed,
Conflict(s)
then reboot the system.
0962
Onboard Parallel Port I/O
Address Conflict(s)
0962
Onboard Parallel Port
IRQ Conflict(s)
0962
Onboard ECP Parallel Port
DMA Conflict(s)
1162
Onboard Serial Port
Conflict(s)
1162
Onboard Serial Port I/O
Address Conflict(s)
1162
Onboard Serial Port IRQ Conflict(s)
1755
Ensure that the hard disk drive is not set
Hard Disk Drive(s) Write Protected
to [Write Protected] in the
Security Options in BIOS Setup.
Load default settings in Setup.
1762
Enter BIOS Setup and load the default settings.
Onboard IDE Primary Channel I/O
Remove all adapter cards that are NOT factory-installed,
Address Conflict(s)
then reboot the system.
1762
Onboard IDE Primary Channel IRQ
Conflict(s)
1762
Onboard IDE Secondary Channel I/O
Address Conflict(s)
1762
Onboard IDE Secondary Channel IRQ
Conflict(s)
1780
Enter BIOS Setup and load the default settings.
IDE Primary Channel Master Drive Error
Check IDE drive jumper.
1781
See '3.5-In. Hard Disk Drive Jumper Settings' and
IDE Primary Channel Slave Drive Error
'5.25-In. Hard Disk Drive Jumper Settings'.
1782
IDE hard disk drive power.
IDE Secondary Channel Master Drive Error
IDE hard disk drive cable/connection.
1783
IDE hard disk drive.
IDE Secondary Channel Slave Drive Error
1780
Enter BIOS Setup and load the default settings.
IDE Primary Channel Master Drive
IDE hard disk drive cable/connection.
Changed
1781
IDE Primary Channel Slave Drive
Changed
1782
IDE Secondary Channel Master Drive
Changed
1783
IDE Secondary Channel Slave Drive
Changed
1800
Load default settings in Setup.
IRQ Setting (PnP ISA Card(s) disabled)
Enter BIOS Setup and set the Reset Resource
1801
Assignments parameter to Yes, then
Expansion ROM Allocation Failed
reboot the system. See 'PnP/PCI Options'.
1802
Remove all adapter cards that are NOT factory-installed,
I/O Resource Conflict(s)
then reboot the system
1803
Memory Resource Conflict(s)
1800
Do not have enough system resource allowed to
PnP ISA Card(s) Disabled
allocate for ISA adapter card.
Remove the ISA adapter card.
Load default settings in Setup.
Enter BIOS Setup and set the
Reset Resource Assignments parameter to Yes,
then reboot the system.
See 'PnP/PCI Options'.
Remove all adapter cards that are NOT
factory-installed, then reboot the system
8601
PS/2 Pointing Device Error or Not Connected
PS/2 Pointing Device Interface Error
Re-connect PS/2 keyboard and mouse.
8603
Enter BIOS Setup and load the default settings.
PS/2 Pointing Device Error
PS/2 mouse
8603
PS/2 keyboard
System board
8602
Enter BIOS Setup and load the default settings.
Onboard Pointing IRQ Device Conflict(s)
Remove all adapter cards that are NOT
factory-installed, then reboot the system.
Please see the LEGAL - Trademark notice.
Feel free - send a for any BUG on this page found - Thank you.