BIOS Beep Codes

AMI BIOS Beep Codes

Beep Code	Description
1 short beep	DRAM (dynamic random access memory) refresh failure.
2 short beeps	Parity circuit failure.
3 short beeps	Base 64 K RAM failure.
4 short beeps	System timer failure.
5 short beeps	Process failure.
6 short beeps	Keyboard controller Gate A20 error.
7 short beeps	Virtual mode exception error.
8 short beeps	Display memory Read/Write test failure.
9 short beeps	ROM BIOS checksum failure.
10 short beeps	How to replace the CMOS battery.
11 short beeps	Cache memory error.
1 long, 2 short beeps	Video card memory issue.
1 long, 3 short beeps	Conventional/Extended memory failure.
1 long, 8 short beeps	Display/Retrace test failed.
Two-tone siren	Low CPU (central processing unit) fan speed, voltage level issue.

Award BIOS Beep Codes

Beep Code	Description
1 long, 2 short beeps	Indicates a video error has occurred and the BIOS cannot initialize the video screen to display any additional information.
1 long, 3 short beeps	Video card not detected (reseat video card) or bad video card.
Beeps repeating endlessly	RAM problem.
Repeated high frequency beeps while PC is running	Overheating processor (CPU).
Repeated beeps alternating high & low frequency	Issue with the processor (CPU), possibly damaged.

Dell Beep Codes

Beep Code	Description
1 beep	BIOS ROM corruption or failure.
2 beeps	Memory (RAM) not detected.
3 beeps	Motherboard failure.
4 beeps	Memory (RAM) failure.
5 beeps	CMOS battery failure.
6 beeps	Video card failure.
7 beeps	Bad processor (CPU).

IBM BIOS Beep Codes

Beep Code	Description
No beeps	Why won't my computer turn on?
1 short beep	Normal POST, computer is ok.
2 short beeps	POST error, review screen for error code.
Continuous beep	No power, loose card, or short.
Repeating short beep	No power, loose card, or short.
1 long, 1 short beep	Motherboard issue.
1 long, 2 short beeps	Video (Mono/CGA display circuitry) issue.
1 long, 3 short beeps	Video (EGA) display circuitry.
3 long beeps	Keyboard or keyboard card error.
1 beep, blank or incorrect display	Video display circuitry.

Insyde Beep Codes

Beep Code	Description
5 short and 1 long beep	Problem with the DMA page registers.
4 short, 1 long, 1 short beep	Circuit for refreshing RAM not working.
4 short and 2 short beeps	BIOS ROM checksum failure.
3 short, 1 long, 2 short beeps	CMOS RAM test failure.
3 short, 1 long, 1 short, 1 long beep	DMA controller failure.
3 short, 2 long, 1 short beep	Interrupt controller failure.
3 short and 3 long beeps	Keyboard self-test issue.
2 short, 1 long, 3 short beeps	Video card not found.
2 short, 1 long, 2 short, 1 long beep	No RAM installed or RAM not recognized.

Macintosh Startup Tones

Tones	Error
Error tone (two sets of different tones)	Problem with logic board or SCSI (small computer system interface) bus.
Startup tone, drive spins, no video	Problem with video controller.
Powers on, no tone	Logic board problem.
High tone, four higher tones	Problem with SIMM (single inline memory module).

Phoenix BIOS Beep Codes

Beep Code	Description and what to check
1-1-1-1	Unconfirmed beep code. Reseat RAM chips or replace RAM chips as possible solution.
1-1-1-3	Verify real mode.
1-1-2-1	Get CPU type.
1-1-2-3	Initialize system hardware.
1-1-3-1	Initialize chipset registers with initial POST values.
1-1-3-2	Set in POST flag.
1-1-3-3	Initialize CPU registers.
1-1-4-1	Initialize cache to initial POST values.
1-1-4-3	Initialize I/O.
1-2-1-1	Initialize power management.
1-2-1-2	Load alternate registers with initial POST values.
1-2-1-3	Jump to UserPatch0.
1-2-2-1	Initialize keyboard controller.
1-2-2-3	BIOS ROM checksum.
1-2-3-1	8254 timer initialization.
1-2-3-3	8237 DMA (direct memory access) controller initialization.
1-2-4-1	Reset programmable interrupt controller.
1-3-1-1	Test DRAM refresh.
1-3-1-3	Test 8742 keyboard controller.
1-3-2-1	Set ES segment to register to 4 GB.
1-3-3-1	Autosize DRAM.
1-3-3-3	Clear 512 K base RAM.
1-3-4-1	Test 512 base address lines.
1-3-4-3	Test 512 K base memory.
1-4-1-3	Test CPU bus clock frequency.
1-4-2-4	Reinitialize the chipset.
1-4-3-1	Shadow system BIOS ROM.
1-4-3-2	Reinitialize the cache.
1-4-3-3	Autosize cache.
1-4-4-1	Configure advanced chipset registers.
1-4-4-2	Load alternate registers with CMOS (complementary metal-oxide semiconductor) values.
2-1-1-1	Set initial CPU speed.
2-1-1-3	Initialize interrupt vectors.
2-1-2-1	Initialize BIOS interrupts.
2-1-2-3	Check ROM Copyright notice.
2-1-2-4	Initialize manager for PCI (Peripheral Component Interconnect) options ROMs.
2-1-3-1	Check video configuration against CMOS.
2-1-3-2	Initialize PCI bus and devices.
2-1-3-3	Initialize all video adapters in system.
2-1-4-1	Shadow video BIOS ROM.
2-1-4-3	Display Copyright notice.
2-2-1-1	Display CPU type and speed.
2-2-1-3	Test keyboard.
2-2-2-1	Set key click if enabled.
2-2-2-3	Enable keyboard.
2-2-3-1	Test for unexpected interrupts.
2-2-3-3	Display prompt Press F2 to enter SETUP.
2-2-4-1	Test RAM between 512 and 640 K.
2-3-1-1	Test expanded memory.
2-3-1-3	Test extended memory address lines.
2-3-2-1	Jump to UserPatch1.
2-3-2-3	Configure advanced cache registers.
2-3-3-1	Enable external and CPU caches.
2-3-3-3	Display external cache size.
2-3-4-1	Display shadow message.
2-3-4-3	Display non-disposable segments.
2-4-1-1	Display error messages.
2-4-1-3	Check for configuration errors.
2-4-2-1	Test real-time clock.
2-4-2-3	Check for keyboard errors.
2-4-4-1	Set up hardware interrupts vectors.
2-4-4-3	Test coprocessor if present.
3-1-1-1	Disable onboard I/O ports.
3-1-1-3	Detect and install external RS232 ports.
3-1-2-1	Detect and install external parallel ports.
3-1-2-3	Re-initialize onboard I/O ports.
3-1-3-1	Initialize BIOS data area.
3-1-3-3	Initialize extended BIOS data area.
3-1-4-1	Initialize floppy controller.
3-2-1-1	Initialize hard disk controller.
3-2-1-2	Initialize local bus hard disk controller.
3-2-1-3	Jump to UserPatch2.
3-2-2-1	Disable A20 address line.
3-2-2-3	Clear huge ES segment register.
3-2-3-1	Search for option ROMs.
3-2-3-3	Shadow option ROMs.
3-2-4-1	Set up Power Management.
3-2-4-3	Enable hardware interrupts.
3-3-1-1	Set time of day.
3-3-1-3	Check key lock.
3-3-3-1	Erase F2 prompt.
3-3-3-3	Scan for F2 key stroke.
3-3-4-1	Enter CMOS setup.
3-3-4-3	Clear in POST flag.
3-4-1-1	Check for errors.
3-4-1-3	POST done, prepare to boot operating system.
3-4-2-1	One beep.
3-4-2-3	Check password (optional).
3-4-3-1	Clear global descriptor table.
3-4-4-1	Clear parity checkers.
3-4-4-3	Clear screen (optional).
3-4-4-4	Check virus and backup reminders.
4-1-1-1	Try to boot with INT 19.
4-2-1-1	Interrupt handler error.
4-2-1-3	Unknown interrupt error.
4-2-2-1	Pending interrupt error.
4-2-2-3	Initialize option ROM error.
4-2-3-1	Shutdown error.
4-2-3-3	Extended block move.
4-2-4-1	Shutdown 10 error.
4-3-1-3	Initialize the chipset.
4-3-1-4	Initialize refresh counter.
4-3-2-1	Check for forced flash.
4-3-2-2	Check HW status of ROM.
4-3-2-3	BIOS ROM is OK.
4-3-2-4	Do a complete RAM test.
4-3-3-1	Do OEM (original equipment manufacturer) initialization.
4-3-3-2	Initialize interrupt controller.
4-3-3-3	Read in bootstrap code.
4-3-3-4	Initialize all vectors.
4-3-4-1	Boot the flash program.
4-3-4-2	Initialize the boot device.
4-3-4-3	Boot code was read OK.
Two-tone siren	Low CPU fan speed, voltage level issue.