Bios Beep Codes

AMI, Phoenix Beep Codes, AST, Compaq, IBM, Mr. BIOS, Tandon, Mylex, Quadtel

AMI Beep Codes

Beeps Error message
1 short System RAM refresh failure
2 short Memory parity error
3 short Base 64-kbytes memory failure
4 short System timer failure
5 short CPU failure
6 short Gate A20 failure
7 short Exception error
8 short Video memory read/write error
9 short ROM checksum error
10 short CMOS shutdown register read/write error
1 long – 3 short Memory test failure
1 long – 8 short Display test failure


Phoenix Beep and Post Codes for PhoenixBIOS 4.x

Beeps POST Error message
1-1-1-3 02 Verify Real Mode
1-1-2-1 04 Get CPU type
1-1-2-3 06 Initialize system hardware
1-1-3-1 08 Initialize chipset registers with initial POST values
1-1-3-2 09 Set in POST flag
1-1-3-3 0A Initialize CPU registers
1-1-4-1 0C Initialize cache to initial POST values
1-1-4-3 0E Initialize I/O
1-2-1-1 10 Initialize Power Management
1-2-1-2 11 Load alternate registers with initial POST values
1-2-1-3 12 Jump to UserPatch0
1-2-2-1 14 Initialize keyboard controller
1-2-2-3 16 BIOS ROM checksum
1-2-3-1 18 8254 timer initialization
1-2-3-3 1A 8237 DMA controller initialization
1-2-4-1 1C Reset Programmable Interrupt Controller
1-3-1-1 20 Test DRAM refresh
1-3-1-3 22 Test 8742 Keyboard Conroller
1-3-2-1 24 Set ES segment to register to 4 GB
1-3-3-1 28 Autosize DRAM
1-3-3-3 2A Clear 512K base RAM
1-3-4-1 2C Test 512 base address lines
1-3-4-3 2E Test 512K base memory
1-4-1-3 32 Test CPU bus-clock frequency
1-4-2-4 37 Reinitialize the chipset
1-4-3-1 38 Shadow system BIOS ROM
1-4-3-2 39 Reinitialize the cache
1-4-3-3 3A Autosize cache
1-4-4-1 3C Configure advanced chipset registers
1-4-4-2 3D Load alternate registers with CMOS values
2-1-1-1 40 Set Initial CPU speed
2-1-1-3 42 Initialize interrupt vectors
2-1-2-1 44 Intialize BIOS interrrupts
2-1-2-3 46 Check ROM copyright notice
2-1-2-4 47 Initialize manager for PCI Options ROMs
2-1-3-1 48 Check video configuration against CMOS
2-1-3-2 49 Initialize PCI bus and devices
2-1-3-3 4A Initialize all video adapters in system
2-1-4-1 4C Shadow video BIOS ROM
2-1-4-3 4E Display copyright notice
2-2-1-1 50 Display CPU type and speed
2-2-1-3 52 Test keyboard
2-2-2-1 54 Set key click if enabled
2-2-2-3 56 Enable keyboard
2-2-3-1 58 Test for unexpected interrupts
2-2-3-3 5A Display prompt “Press F2 to enter SETUP”
2-2-4-1 5C Test RAM between 512 and 640k
2-3-1-1 60 Test expanded memory
2-3-1-3 62 Test extended memory address lines
2-3-2-1 64 Jump to UserPatch1
2-3-2-3 66 Configure advanced cache registers
2-3-3-1 68 Enable external and CPU caches
2-3-3-3 6A Display external cache size
2-3-4-1 6C Display shadow message
2-3-4-3 6E Display non-disposable segments
2-4-1-1 70 Display error messages
2-4-1-3 72 Check for configuration errors
2-4-2-1 74 Test real-time clock
2-4-2-3 76 Check for keyboard errors
2-4-4-1 7C Set up hardware interrupts vectors
2-4-4-3 7E Test coprocessor if present
3-1-1-1 80 Disable onboard I/O ports
3-1-1-3 82 Detect and install external RS232 ports
3-1-2-1 84 Detect and install external parallel ports
3-1-2-3 86 Re-initialize onboard I/O ports
3-1-3-1 88 Initialize BIOS Data Area
3-1-3-3 8A Initialize Extended BIOS Data Area
3-1-4-1 8C Initialize floppy controller
3-2-1-1 90 Initialize hard-disk controller
3-2-1-2 91 Initialize local-bus hard-disk controller
3-2-1-3 92 Jump to UserPatch2
3-2-2-1 94 Disable A20 adress line
3-2-2-3 96 Clear huge ES segment register
3-2-3-1 98 Search for option ROMs
3-2-3-3 9A Shadow option ROMs
3-2-4-1 9C Set up Power Management
3-2-4-3 9E Enable hardware interrupts
3-3-1-1 A0 Set time of day
3-3-1-3 A2 Check key lock
3-3-3-1 A8 Erase F2 prompt
3-3-3-3 AA Scan for F2 key stroke
3-3-4-1 AC Enter SETUP
3-3-4-3 AE Clear in-POST flag
3-4-1-1 B0 Check for errors
3-4-1-3 B2 POST done–prepare to boot operating system
3-4-2-1 B4 One beep
3-4-2-3 B6 Check password (optional)
3-4-3-1 B8 Clear global descriptor table
3-4-4-1 BC Clear parity checkers
3-4-4-3 BE Clear screen (optional)
3-4-4-4 BF Check virus and backup reminders
4-1-1-1 C0 Try to boot with INT 19
4-2-1-1 D0 Interrupt handler error
4-2-1-3 D2 Unknown interrupt error
4-2-2-1 D4 Pending interrupt error
4-2-2-3 D6 Initialize option ROM error
4-2-3-1 D8 Shutdown error
4-2-3-3 DA Extended Block Move
4-2-4-1 DC Shutdown 10 error
4-3-1-3 E2 Initialize the chipset
4-3-1-4 E3 Initialize refresh counter
4-3-2-1 E4 Check for Forced Flash
4-3-2-2 E5 Check HW status of ROM
4-3-2-3 E6 BIOS ROM is OK
4-3-2-4 E7 Do a complete RAM test
4-3-3-1 E8 Do OEM initialization
4-3-3-2 E9 Initialize interrupt controller
4-3-3-3 EA Read in bootstrap code
4-3-3-4 EB Initialize all vectors
4-3-4-1 EC Boot the Flash program
4-3-4-2 ED Initialize the boot device
4-3-4-3 EE Boot code was read OK


Phoenix Beep Codes for ISA/MCA/EISA BIOS

Beeps Error message
1-1-2 CPU register test failure
Low 1-1-2 System board select failure
1-1-3 CMOS read/write failure
Low 1-1-3 Extended CMOS RAM failure
1-1-4 BIOS ROM checksum error
1-2-1 Programmable interval timer (PIT) failure
1-2-2 DMA initialization failure
1-2-3 DMA page register read/write failure
1-3-1 RAM refresh failure
1-3-2 64-kbyte RAM test disabled
1-3-3 First 64-kbytes RAM IC or data line failure
1-3-4 First 64-kbytes odd/even logic failure
1-4-1 Address line failure, 64 kbytes of RAM
1-4-2 Parity failure, first 64 kbytes of RAM
1-4-3 EISA failsafe timer test fault
1-4-4 EISA NMI port 462 test failure
2-1-1 Bit 0 first 64 kbytes RAM failure
2-1-2 Bit 1 first 64 kbytes RAM failure
2-1-3 Bit 2 first 64 kbytes RAM failure
2-1-4 Bit 3 first 64 kbytes RAM failure
2-2-1 Bit 4 first 64 kbytes RAM failure
2-2-2 Bit 5 first 64 kbytes RAM failure
2-2-3 Bit 6 first 64 kbytes RAM failure
2-2-4 Bit 7 first 64 kbytes RAM failure
2-3-1 Bit 8 first 64 kbytes RAM failure
2-3-2 Bit 9 first 64 kbytes RAM failure
2-3-3 Bit 10 first 64 kbytes RAM failure
2-3-4 Bit 11 first 64 kbytes RAM failure
2-4-1 Bit 12 first 64 kbytes RAM failure
2-4-2 Bit 13 first 64 kbytes RAM failure
2-4-3 Bit 14 first 64 kbytes RAM failure
2-4-4 Bit 15 first 64 kbytes RAM failure
3-1-1 Slave DMA register failure
3-1-2 Master DMA register failure
3-1-3 Master interrupt mask register failure
3-1-4 Slave interrupt mask register failure
3-2-2 Interrupt vector loading error
3-2-3 Reserved
3-2-4 Keyboard controller test failure
3-3-1 CMOS RAM power bad
3-3-2 CMOS configuration error
3-3-3 Reserved
3-3-4 Video memory test failed
3-4-1 Video initialization test failure
4-2-1 Timer tick failure
4-2-2 Shutdown test failure
4-2-3 Gate A20 failure
4-2-4 Unexpected interrupt in protected mode
4-3-1 RAM test address failure
4-3-3 Interval timer channel 2 failure
4-3-4 Time-of-day clock failure
4-4-1 Serial-port test failure
4-4-2 Parallel-port test failure
4-4-3 Math coprocessor failure



AST Beep Codes

Beeps Error message
1 short CPU register test failure
2 short Keyboard controller buffer failure
3 short Keyboard controller reset failure
4 short Keyboard communication failure
5 short Keyboard input port failure
6 short System board chipset initialization failure
9 short BIOS ROM checksum error
10 short System timer test failure
11 short ASIC register test failure
12 short CMOS RAM shutdown register failure
1 long DMA controller 0 failure
1 long – 1 short DMA controller 1 failure
1 long – 2 short Video vertical retrace failure
1 long – 3 short Video memory test failure
1 long – 4 short Video adapter test failure
1 long – 5 short 64 kbytes base memory failure
1 long – 6 short Unable to load interrupt vectors
1 long – 7 short Unable to initialize video system
1 long – 8 short Video memory failure



Compaq Beep Codes

Beeps Error message
1 short No error
1 long – 1 short BIOS ROM checksum error
2 short General error
1 long – 2 short Video adapter error



IBM Beep Codes

Beeps Error message
l short Start of test
2 short Initialization error
1 long – 1 short System board error
1 long – 2 short Video adapter error
1 long – 3 short EGA/VGA adapter error
3 long Keyboard adapter error
999 short Power supply or system board error
None Power supply or system board error



 
Quadtel Beep Codes

Beeps Error message
1 short Start of test
2 short CMOS IC error
1 long – 2 short Video controller error
1 long > 2 short Peripheral controller error



Mr. BIOS Beep Codes

Beeps Error message
low high, low low low ROM BIOS Checksum Test
low high, high low low Page Register Test (Ports 81-8F)
low high, low high low 8042 Keyboard Controller Selftest
low high, high high low Memory Refresh Circuit Test
low high, low low high Master (16bit) DMA Controller Failure
low high, high low high Slave (8 bit) DMA Controller Failure
low high, low low low low Memory Bank 0 Pattern Test Failure
low high, high low low low Memory Bank 0 Parity Circuitry Failure
low high, low high low low Memory Bank 0 Parity Error
low high, high high low low Memory Bank 0 Data Bus Failure
low high, low low high low Memory Bank 0 Address Bus Failure
low high, high low high low Memory Bank 0 Block Access Read Failure
low high, low high high low Memory Bank 0 Block Access Read/Write Failure
low high, high high high low Master 8259 (Port 21 ) Failure
low high, low low low high Slave 8259 (Port A1) Failure
low high, high low low high Master 8259 (Port 20) Interrupt Address Error
low high, low high low high Slave 8259 (Port A0) Interrupt Address Error
low high, high high low low 8259 (Port 20/A0) Interrupt Address Error
low high, low low high high Master 8259 (Port 20) Stuck Intercept Error
low high, high low high high Slave 8259 (Port A0) Stuck Intercept Error
low high, low high high high System Timer 8254 CH0/IRQ0 Interrupt Failure
low high, high high high high 8254 Channel 0 Test and Initialization
low high, low low low low high 8254 Channel-2 (Speaker) Failure
low high, high low low low high 8254 OUT2 (Speaker Detect) Failure
low high, low high low low high CMOS RAM Read/Write Test Failure
low high, high high low low high RTC Periodic Interrupt / IRQ8 Failure
low high, low low high low high Video Initialization and (Cold-Boot) Sign on Message
low high, high low high low high Keyboard Controller Failure
low high, low low low high high A20 Test Failure Due to 8042 Timeout
low high, high low low high high A20 Gate Stuck in Disabled State
low high, low high high low high Memory Parity Error
low high, high high high low high IO Channel Error
low high, low high low high high Real Time Clock is Not Updating


Mylex and Eurosoft Beep Codes

Beeps Error message
1 Start of test
2 Video adapter error
3 Keyboard controller error
4 Keyboard error
5 PIC 0 error
6 PIC 1 error
7 DMA page register error
8 RAM refresh error
9 RAM data error
10 RAM parity error
11 DMA controller 0 error
12 CMOS RAM error
13 DMA controller 1 error
14 CMOS RAM battery error
15 CMOS RAM checksum error
16 BIOS ROM checksum error


 Mylex 386 Beep Codes

Beeps Error message
1 long Start of test
2 long Video adapter fault (or adapter missing)
1 long – 1 short – 1 long Keyboard controller error
1 long – 2 short – 1 long Keyboard error
1 long – 3 short – 1 long PIC 0 error
1 long – 4 short – 1 long PIC 1 error
1 long – 5 short – 1 long DMA page register error
1 long – 6 short – 1 long RAM refresh error
1 long – 7 short – 1 long RAM data test error
1 long – 8 short – 1 long RAM parity error
1 long – 9 short – 1 long DAM controller 1 error
1 long – 10 short – 1 long CMOS RAM failure
1 long – 11 short – 1 long DMA controller 2 error
1 long – 12 short – 1 long CMOS RAM battery failure
1 long – 13 short – 1 long CMOS checksum failure
1 long – 14 short – 1 long BIOS ROM checksum failure
>1 long Multiple faults detected


Tandon Beep Codes

Beeps Error message
long – short – long – short 8524 counter timer failure
short – long – short RAM refresh failure
long – long – long System RAM failure
short – short – short BIOS RAM checksum failure
long – long No video adapter is installed
long – long – long – long Video adapter failure

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