Appendix A: Bios Beep Codes And Checkpoints - RadiSys PROCELERANT SB5520DT1-SATA Product Manual

BIOS BEEP CODES AND CHECKPOINTS
Errors may occur during the POST (Power-On Self-Test) routines, which are performed each
time the system is powered on. These errors can be:
Non-fatal, which typically allow the system to continue with the boot-up process. The error

messages usually appear on the screen.
Fatal, which do not allow the system to proceed with the boot-up procedure. If a fatal error

occurs, you should consult with your system manufacturer for possible repairs.
Fatal errors are usually communicated through a series of audible beeps.
Beeps Description
1
Memory refresh timer error
3
Base memory read/write test error
6 Keyboard controller BAT command failure
7
General exception (processor exception interrupt) error
8
Display memory (system video adapter) error
1
Reseat the memory, or replace it with modules known to be good.
2 Eliminate the possibility of interference by a malfunctioning add-in card. Remove all expansion cards except the
video adapter.
 If beep codes are generated when all other expansion cards are absent, consult your RadiSys representative.
 If beep codes are not generated when all other expansion cards are absent, one of the add-in cards is caus-
ing the malfunction. Insert the cards back into the system one at a time until the problem happens again.
This will reveal the malfunctioning card.
3
If the system video adapter is an add-in card, reseat or replace it. If the video adapter is an integrated part of
the system board, the board itself may be faulty.
Checkpoint Description
03 Disable NMI, Parity, video for EGA, and DMA controllers. Initialize BIOS, POST, Runtime data area.
Also initialize BIOS modules on POST entry and GPNV area. Initialized CMOS as mentioned in the
Kernel Variable "wCMOSFlags."
04 Check CMOS diagnostic byte to determine whether battery power is OK and CMOS checksum is
OK. Verify CMOS checksum manually by reading storage area. If the CMOS checksum is bad,
update CMOS with power-on default values, and clear passwords. Initialize status register A.
Initializes data variables that are based on CMOS setup questions. Initializes both the 8259-
compatible PICs in the system
05 Initializes the interrupt controlling hardware (generally PIC) and interrupt vector table.
Table 61. POST BIOS error beep codes
1
1
2
3
Table 62. POST code checkpoints
2
A
67