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About Your System | 23
Post Error Code
Collecting System Event Log (SEL) for Investigation
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 three 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
0003h CMOS Battery Low Pause
0005h CMOS Checksum Bad Pause
0166h CPU Frequency mismatch! Halt
0167h CPUID mismatch! Halt
0168h L1 cache size mismatch! Halt
0169h L2 cache size mismatch! Halt
016Ah CPU Patch level mismatch! Halt