227
Error Code Error Message Attributes Pause on
Boot
8510 DIMM5 defective. WARN/YELLOW_BLACK Yes
8511 DIMM6 defective. WARN/YELLOW_BLACK Yes
8512 DIMM7 defective. WARN/YELLOW_BLACK Yes
8513 DIMM8 defective. WARN/YELLOW_BLACK Yes
POST Beep Codes
During the course of executing POST, there are occasions where fatal problems happen before
video is enabled. These fatal errors are conveyed with the use of the speaker via encoded beeps,
coupled with POST debug codes. There are also beeps emitted in conjunction with the display of
errors via the POST error manager.
Since the duration of the display-less POST execution is relatively short, there are fewer beep codes
than displayed error codes.
In order to extend the useful range of the beep codes, without the need to have dozens of codes, the
beeps are classified and the distinction within class is made via the POST debug card. See Tables
50 and 51.
Table 50. Error Beep Codes
Beeps Error message Description
3 Memory failure
Memory test failure. See table below for additional error
information.
4 System timer System timer is not operational
5 Processor failure Processor failure detected
7 Processor exception interrupt error The CPU generated an exception interrupt.
8 Display memory read/write error
The system video adapter is either missing or its
memory is faulty.
9 ROM checksum error System BIOS ROM checksum error
11 Invalid BIOS General BIOS ROM error
Table 51. POST Memory Beep Error Codes – Debug Port Encoding List
Beep
Code
Debug port error code (lower byte
of North I2C debug display)
Meanings
3 CF9Fh No valid memory was found in the system
3 CF64h
Mismatched DIMMs in a row, and no valid memory to
boot
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