Beep codes for Phoenix BIOS
Use these codes to help troubleshoot problems related to system startup or flashing BIOS memory (such as in BIOS upgrades). When troubleshooting further, refer to the section Resolving beep codes.
Four series of beeps indicate a fatal error; that is, a problem exists which prevents the computer from starting. For example, there might be two beeps, a short pause, one beep, a short pause, one beep, a short pause, and then three beeps; this is represented as 2-1-1-3 in the chart below.
NOTE:
The following codes can vary depending on BIOS version.
Beeps
Post Code
Description of failure
One short beep
0
POST process completed successfully - normal startup
1-1-1-3
02h
Verify real mode
1-1-2-1
04h
Get CPU type
1-1-2-3
06h
Initialize system hardware
1-1-3-1
08h
Initialize chipset registers with initial POST values
1-1-3-2
09h
Set in POST flag
1-1-3-3
0Ah
Initialize CPU registers
1-1-4-1
0Ch
Initialize cache to initial POST values
1-1-4-3
0Eh
Initialize I/O
1-2-1-1
10h
Initialize Power Management
1-2-1-2
11h
Load alternate registers with initial POST values
1-2-1-3
12h
Jump to UserPatch0
1-2-2-1
14h
Initialize keyboard controller
1-2-2-3
16h
BIOS ROM checksum
1-2-3-1
18h
8254 timer initialization
1-2-3-3
1Ah
8237 DMA controller initialization
1-2-4-1
1Ch
Reset Programmable Interrupt Controller
1-3-1-1
20h
Test DRAM refresh
1-3-1-3
22h
Test 8742 Keyboard Controller
1-3-2-1
24h
Set ES segment register to 4 GB
1-3-3-1
28h
Autosize DRAM
1-3-3-3
2Ah
Clear 512K base RAM
1-3-4-1
2Ch
Test 512 base address lines
1-3-4-3
2Eh
Test 512K base memory
1-4-1-3
32h
Test CPU bus-clock frequency
1-4-2-1
34h
CMOS RAM read/write failure
1-4-2-4
37h
Reinitialize the chipset
1-4-3-1
38h
Shadow system BIOS ROM
1-4-3-2
39h
Reinitialize the cache
1-4-3-3
3Ah
Autosize cache
1-4-4-1
3Ch
Configure advanced chipset registers
1-4-4-2
3Dh
Load alternate registers with CMOS values
2-1-1-1
40h
Set Initial CPU speed
2-1-1-3
42hs
Initialize interrupt vector
2-1-2-1
44h
Initialize BIOS interrupts
2-1-2-3
46h
Check ROM copyright notice
2-1-2-4
47h
Initialize manager for PCI Options ROMs
2-1-3-1
48h
Check video configuration against CMOS
2-1-3-2
49h
Initialize PCI bus and devices
2-1-3-3
4Ah
Initialize all video adapters in system
2-1-4-1
4Ch
Shadow video BIOS ROM
2-1-4-3
4Eh
Display copyright notice
2-2-1-1
50h
Display CPU type and speed
2-2-1-3
52h
Test keyboard
2-2-2-1
54h
Set key click if enabled
2-2-2-3
56h
Enable keyboard
2-2-3-1
58h
Test for unexpected interrupts
2-2-3-3
5Ah
Display prompt "Press F2 to enter SETUP"
2-2-4-1
5Ch
Test RAM between 512 and 640k
2-3-1-1
60h
Test expanded memory
2-3-1-3
62h
Test extended memory address lines
2-3-2-1
64h
Jump to UserPatch1
2-3-2-3
66h
Configure advanced cache registers
2-3-3-1
68h
Enable external and CPU caches
2-3-3-2
69h
Initialize SMI handler
2-3-3-3
6Ah
Display external cache size
2-3-4-1
6Ch
Display shadow message
2-3-4-3
6Eh
Display non-disposable segments
2-4-1-1
70h
Display error messages
2-4-1-3
72h
Check for configuration errors
2-4-2-1
74h
Test real-time clock
2-4-2-3
76h
Check for keyboard errors
2-4-4-1
7Ch
Set up hardware interrupts vectors
2-4-4-3
7Eh
Test coprocessor if present
3-1-1-1
80h
Disable onboard I/O ports
3-1-1-3
82h
Detect and install external RS232 ports
3-1-2-1
84h
Detect and install external parallel ports
3-1-2-3
86h
Re-initialize onboard I/O ports
3-1-3-1
88h
Initialize BIOS data area
3-1-3-3
8Ah
Initialize extended BIOS data area
3-1-4-1
8Ch
Initialize floppy controller
3-2-1-1
90h
Initialize hard-disk controller
3-2-1-2
91h
Initialize local-bus hard-disk controller
3-2-1-3
92h
Jump to UserPatch2
3-2-2-1
94h
Disable A20 address line
3-2-2-3
96h
Clear huge ES segment register
3-2-3-1
98h
Search for option ROMs
3-2-3-3
9Ah
Shadow option ROMs
3-2-4-1
9Ch
Set up Power Management
3-2-4-3
9Eh
Enable hardware interrupts
3-3-1-1
A0h
Set time of day
3-3-1-3
A2h
Check key lock
3-3-3-1
A8h
Erase F2 prompt
3-3-3-3
Aah
Scan for F2 key stroke
3-3-4-1
AChP
Enter SETUP
3-3-4-3
Aeh
Clear in-POST flag
3-4-1-1
B0h
Check for errors
3-4-1-3
B2h
POST done--prepare to boot operating system
3-4-2-1
B4h
One beep
3-4-2-3
B6h
Check password (optional)
3-4-3-1
B8h
Clear global descriptor table
3-4-4-1
BCh
Clear parity checkers
3-4-4-3
Beh
Clear screen (optional)
3-4-4-4
BFh
Check virus and backup reminders
4-1-1-1
C0h
Try to boot with INT 19
4-2-1-1
D0h
Interrupt handler error
4-2-1-3
D2h
Unknown interrupt error
4-2-2-1
D4h
Pending interrupt error
4-2-2-3
D6h
Initialize option ROM error
4-2-3-1
D8h
Shutdown error
4-2-3-3
Dah
Extended Block Move
4-2-4-1
DCh
Shutdown error
4-2-4-3
Deh
Keyboard Controller Failure
4-3-1-3
E2h
Initialize the chipset
4-3-1-4
E3h
Initialize refresh counter
4-3-2-1
E4h
Check for Forced Flash
4-3-2-2
E5h
Check HW status of ROM
4-3-2-3
E6h
BIOS ROM is OK
4-3-2-4
E7h
Do a complete RAM test
4-3-3-1
E8h
Do OEM initialization
4-3-3-2
E9h
Initialize interrupt controller
4-3-3-3
Eah
Read in bootstrap code
4-3-3-4
Ebh
Initialize all vectors
4-3-4-1
Ech
Boot the Flash program
4-3-4-2
Edh
Initialize the boot device
4-3-4-3
Eeh
Boot code was read OK
Use these codes to help troubleshoot problems related to system startup or flashing BIOS memory (such as in BIOS upgrades). When troubleshooting further, refer to the section Resolving beep codes.
Four series of beeps indicate a fatal error; that is, a problem exists which prevents the computer from starting. For example, there might be two beeps, a short pause, one beep, a short pause, one beep, a short pause, and then three beeps; this is represented as 2-1-1-3 in the chart below.
NOTE:
The following codes can vary depending on BIOS version.
Beeps
Post Code
Description of failure
One short beep
0
POST process completed successfully - normal startup
1-1-1-3
02h
Verify real mode
1-1-2-1
04h
Get CPU type
1-1-2-3
06h
Initialize system hardware
1-1-3-1
08h
Initialize chipset registers with initial POST values
1-1-3-2
09h
Set in POST flag
1-1-3-3
0Ah
Initialize CPU registers
1-1-4-1
0Ch
Initialize cache to initial POST values
1-1-4-3
0Eh
Initialize I/O
1-2-1-1
10h
Initialize Power Management
1-2-1-2
11h
Load alternate registers with initial POST values
1-2-1-3
12h
Jump to UserPatch0
1-2-2-1
14h
Initialize keyboard controller
1-2-2-3
16h
BIOS ROM checksum
1-2-3-1
18h
8254 timer initialization
1-2-3-3
1Ah
8237 DMA controller initialization
1-2-4-1
1Ch
Reset Programmable Interrupt Controller
1-3-1-1
20h
Test DRAM refresh
1-3-1-3
22h
Test 8742 Keyboard Controller
1-3-2-1
24h
Set ES segment register to 4 GB
1-3-3-1
28h
Autosize DRAM
1-3-3-3
2Ah
Clear 512K base RAM
1-3-4-1
2Ch
Test 512 base address lines
1-3-4-3
2Eh
Test 512K base memory
1-4-1-3
32h
Test CPU bus-clock frequency
1-4-2-1
34h
CMOS RAM read/write failure
1-4-2-4
37h
Reinitialize the chipset
1-4-3-1
38h
Shadow system BIOS ROM
1-4-3-2
39h
Reinitialize the cache
1-4-3-3
3Ah
Autosize cache
1-4-4-1
3Ch
Configure advanced chipset registers
1-4-4-2
3Dh
Load alternate registers with CMOS values
2-1-1-1
40h
Set Initial CPU speed
2-1-1-3
42hs
Initialize interrupt vector
2-1-2-1
44h
Initialize BIOS interrupts
2-1-2-3
46h
Check ROM copyright notice
2-1-2-4
47h
Initialize manager for PCI Options ROMs
2-1-3-1
48h
Check video configuration against CMOS
2-1-3-2
49h
Initialize PCI bus and devices
2-1-3-3
4Ah
Initialize all video adapters in system
2-1-4-1
4Ch
Shadow video BIOS ROM
2-1-4-3
4Eh
Display copyright notice
2-2-1-1
50h
Display CPU type and speed
2-2-1-3
52h
Test keyboard
2-2-2-1
54h
Set key click if enabled
2-2-2-3
56h
Enable keyboard
2-2-3-1
58h
Test for unexpected interrupts
2-2-3-3
5Ah
Display prompt "Press F2 to enter SETUP"
2-2-4-1
5Ch
Test RAM between 512 and 640k
2-3-1-1
60h
Test expanded memory
2-3-1-3
62h
Test extended memory address lines
2-3-2-1
64h
Jump to UserPatch1
2-3-2-3
66h
Configure advanced cache registers
2-3-3-1
68h
Enable external and CPU caches
2-3-3-2
69h
Initialize SMI handler
2-3-3-3
6Ah
Display external cache size
2-3-4-1
6Ch
Display shadow message
2-3-4-3
6Eh
Display non-disposable segments
2-4-1-1
70h
Display error messages
2-4-1-3
72h
Check for configuration errors
2-4-2-1
74h
Test real-time clock
2-4-2-3
76h
Check for keyboard errors
2-4-4-1
7Ch
Set up hardware interrupts vectors
2-4-4-3
7Eh
Test coprocessor if present
3-1-1-1
80h
Disable onboard I/O ports
3-1-1-3
82h
Detect and install external RS232 ports
3-1-2-1
84h
Detect and install external parallel ports
3-1-2-3
86h
Re-initialize onboard I/O ports
3-1-3-1
88h
Initialize BIOS data area
3-1-3-3
8Ah
Initialize extended BIOS data area
3-1-4-1
8Ch
Initialize floppy controller
3-2-1-1
90h
Initialize hard-disk controller
3-2-1-2
91h
Initialize local-bus hard-disk controller
3-2-1-3
92h
Jump to UserPatch2
3-2-2-1
94h
Disable A20 address line
3-2-2-3
96h
Clear huge ES segment register
3-2-3-1
98h
Search for option ROMs
3-2-3-3
9Ah
Shadow option ROMs
3-2-4-1
9Ch
Set up Power Management
3-2-4-3
9Eh
Enable hardware interrupts
3-3-1-1
A0h
Set time of day
3-3-1-3
A2h
Check key lock
3-3-3-1
A8h
Erase F2 prompt
3-3-3-3
Aah
Scan for F2 key stroke
3-3-4-1
AChP
Enter SETUP
3-3-4-3
Aeh
Clear in-POST flag
3-4-1-1
B0h
Check for errors
3-4-1-3
B2h
POST done--prepare to boot operating system
3-4-2-1
B4h
One beep
3-4-2-3
B6h
Check password (optional)
3-4-3-1
B8h
Clear global descriptor table
3-4-4-1
BCh
Clear parity checkers
3-4-4-3
Beh
Clear screen (optional)
3-4-4-4
BFh
Check virus and backup reminders
4-1-1-1
C0h
Try to boot with INT 19
4-2-1-1
D0h
Interrupt handler error
4-2-1-3
D2h
Unknown interrupt error
4-2-2-1
D4h
Pending interrupt error
4-2-2-3
D6h
Initialize option ROM error
4-2-3-1
D8h
Shutdown error
4-2-3-3
Dah
Extended Block Move
4-2-4-1
DCh
Shutdown error
4-2-4-3
Deh
Keyboard Controller Failure
4-3-1-3
E2h
Initialize the chipset
4-3-1-4
E3h
Initialize refresh counter
4-3-2-1
E4h
Check for Forced Flash
4-3-2-2
E5h
Check HW status of ROM
4-3-2-3
E6h
BIOS ROM is OK
4-3-2-4
E7h
Do a complete RAM test
4-3-3-1
E8h
Do OEM initialization
4-3-3-2
E9h
Initialize interrupt controller
4-3-3-3
Eah
Read in bootstrap code
4-3-3-4
Ebh
Initialize all vectors
4-3-4-1
Ech
Boot the Flash program
4-3-4-2
Edh
Initialize the boot device
4-3-4-3
Eeh
Boot code was read OK
