Electro help: April 2014

BIOS BEEP-CODES

What to do when beep codes occur

Listen to the beeping sound and write down the number of beeps before each pause, if the beeps are long or short, or if the beeps high or low in tone. Once a pattern is determined, use the following beep code table to identify which component might be causing the problem: Use these codes to help troubleshoot problems related to system start-up or flashing BIOS memory (such as in BIOS upgrades). When troubleshooting further, refer to the section What to do when beep codes occur .
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:

1 short beep and 1 long beep : Memory problem

2 short beeps and 1 long beep (repeats 5 times) : Unable to initialize video or video card required but not installed

3 short beeps and 1 long beep : CPU configuration error or CPU type is not compatible

The following beep codes can occur while restoring, flashing or updating the BIOS:

1short beep : Legacy floppy drive or CD/DVD drive not detected

2short beeps : Floppy diskette or compact disc not detected

3short beeps : Unable to start flashing (such as when missing a utility or BIOS image)

4short beeps : Flashing failed (checksum error, corrupted image, etc.)

5short beeps : BIOS recovery successful

Perform the following steps to resolve beeping issues. Before starting a task, turn off the computer, and then remove the power cord. After completing a task, replace any covers, reconnect the power cord, turn on the computer, and then listen for a beep code.

* Remove any media from the floppy drives, CD/DVD drives, USB ports, and memory card reader slots, and disconnect all non-essential devices (printers, scanners, external hard drives, and similar).

* Disconnect the mouse and keyboard, and then restart the computer. If the beeping sound stops, repair or replace those devices.

* Hot air can damage internal components! Remove any obstructions that block vents. Clean the cooling vents on the case to remove dust. If cooling fans stop spinning or make strange noises, service the computer.

* Remove the memory cover, and then re-seat all memory modules. If the computer stops beeping, a memory module might not have been fully seated or connected.

If the computer has multiple memory modules, turn on the computer with only one memory module installed. If the computer stops beeping, the memory module might be defective, or might be the wrong type of memory for the motherboard. Reinsert the memory into the socket to see if a connection was the problem; otherwise replace the module. Repeat this process for all memory modules installed in the computer If all of the above steps have been tried and the beeping sound still exists, refer to beep code table specific to the motherboard of the computer

Beep codes for American Megatrends, Inc (AMI) bios.

The following AMI beep codes can occur when there is a problem during the attempt of a normal system start-up. Use these codes to help troubleshoot problems related to system start-up. When troubleshooting further.

1 beep : Memory timing failure

2 beeps : Memory parity error

3beeps : Memory read or write failure

4, 5, 6, 7 : Fatal errors related to the operation of critical motherboard components - such as the CPU.

8 beeps : Video memory

AMI beep codes that can occur when attempting to flash or recover the BIOS. You can use these codes to help troubleshoot problems related to system start-up or flashing BIOS memory (such as in BIOS upgrades).

1beep : No media detected

2beeps : ROM file not found in root directory

3beeps : Insert next media volume

4beeps : Flash Programming successful

5beeps : Failure while reading file

7beeps : Flash EPROM not detected

10beeps : Failure while erasing flash memory

11beeps : Flash program error

12beeps : Problem with ROM file size

13beeps : ROM image does not match BIOS requirements

Beep codes for Phoenix BIOS

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.

eps	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

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