POST Error Messages and Handling
Whenever possible, the BIOS will output the current boot progress codes on the video screen. Progress codes are 32-bit
quantities plus optional data. The 32-bit numbers include class, subclass, and operation information. The class and subclass
fields point to the type of hardware that is being initialized. The operation field represents the specific initialization activity.
Based on the data bit availability to display progress codes, a progress code can be customized to fit the data width. The
higher the data bit, the higher the granularity of information that can be sent on the progress port. The progress codes may be
reported by the system BIOS or option ROMs.
The Response section in the following table is divided into 3 types:
1. Warning or Not an error
– The message is displayed on the screen. An error record is logged to the SEL. The system
will continue booting with a degraded state. The user may want to replace the erroneous unit.
2. Pause
– The message is displayed on the screen, an error is logged to the SEL, and user input is required to continue. The
user can take immediate corrective action or choose to continue booting.
3. Halt
– The message is displayed on the screen, an error is logged to the SEL, and the system cannot boot unless the error is
resolved. The user needs to replace the faulty part and restart the system.
Error Code
Error Message
Response
0000 Timer
Error
Pause
0003 CMOS
Battery
Low
Pause
0004 CMOS
Settings
Wrong
Pause
0005
CMOS Checksum Bad
Pause
000B
CMOS memory size Wrong
Pause
000C
RAM R/W test failed
Pause
000E
A: Driver Error
Pause
000F
B: Driver Error
Pause
0012
CMOS Date/Time Not Set
Pause
0015
USB Keyboard not found
Pause
0016
POST NO PXE-capable device available
Pause
0017
WARN SETUP INVALID Error
Warning
0018
WARN DIMM COMPAT MINOR X16 C0MBO Error
Warning
0019
WARN DIMM COMPAT MINOR MAX RANKS Error
Warning
001A
WARN DIMM COMPAT MINOR QR Error
Warning
Appendix A — Support
165
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