About Your System | 23Post Error CodeCollecting System Event Log (SEL) for InvestigationWhenever possible, the BIOS will output the current boot progress codeson the video screen. Progress codes are 32-bit quantities plus optional data.The 32-bit numbers include class, subclass, and operation information. Theclass and subclass fields point to the type of hardware that is beinginitialized. The operation field represents the specific initialization activity.Based on the data bit availability to display progress codes, a progress codecan be customized to fit the data width. The higher the data bit, the higherthe granularity of information that can be sent on the progress port. Theprogress 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. Anerror record is logged to the SEL. The system will continue bootingwith 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 tothe SEL, and user input is required to continue. The user can takeimmediate corrective action or choose to continue booting.3 Halt – The message is displayed on the screen, an error is logged to theSEL, and the system cannot boot unless the error is resolved. The userneeds to replace the faulty part and restart the system.Error Code Error Message Response0003h CMOS Battery Low Pause0005h CMOS Checksum Bad Pause0166h CPU Frequency mismatch! Halt0167h CPUID mismatch! Halt0168h L1 cache size mismatch! Halt0169h L2 cache size mismatch! Halt016Ah CPU Patch level mismatch! Halt
