BIOS Beep Codes
 

An introduction to BIOS beep codes

When you power on your computer, the motherboard's basic input/output system (BIOS) first detects the computer's internal hardware configuration and then performs the power-on self-test (POST). The POST executes several diagnostic tests that check the basic functionality of the power supply, motherboard, CPU, I/O Bus Controller, RAM, keyboard, and video components. If the computer passes the POST, it will usually return a single short beep or two short beeps, depending on the BIOS manufacturer. If the POST detects any problems, it will halt the boot process and return an error message either visually on the screen and/or audibly through a series of beeps.

 

Unfortunately, there is no official standard for beep codes. Depending on the BIOS manufacturer, a keyboard controller failure could be three, four, five, or six beeps. While this document lists common BIOS manufacturer beep codes, you should always consult your motherboard's documentation, the manufacturer's Web site, and the BIOS manufacturer's Web site for a definitive beep code list for your particular BIOS. The information contained in the following lists was gathered from various BIOS manufacturers' Web sites.

 

 

AMI BIOS beep codes
http://www.ami.com/support/bios.html

Number of beeps

Problem description

Troubleshooting recommendation

1

Refresh error

Reseat memory or replace with known good chips.

2

Parity error

Reseat memory or replace with known good chips.

3

Base 64K memory failure

Reseat memory or replace with known good chips.

4

Timer not operational

Repair/replace motherboard.

5

Processor error

Repair/replace motherboard.

6

8042—gate A20 failure

Reseat keyboard controller chip, replace keyboard controller chip, check for a keyboard fuse, or try a different keyboard.

7

Processor exception interrupt error

Repair/replace motherboard.

8

Display memory read/write failure

Replace video card or video card memory.

9

ROM checksum error/Faulty BIOS chips

Replace chips or motherboard.

10

CMOS shutdown register read/write error

Repair/replace motherboard.

11

Cache memory bad

 

 


 

Award BIOS beep codes
http://www.phoenix.com/pcuser/awardbios/award_error_codes.html

Number of beeps

Problem description

Troubleshooting recommendation

1 long & 2 short

Video error

Check the video card.

Any other beeps

RAM problem

Reseat the RAM or replace with known good chips.

 

 

PhoenixBIOS beep codes
http://www.phoenix.com/pcuser/PDF-Files/bios-postcode.pdf

Unfortunately, PhoenixBIOS beep codes are significantly more complicated than other BIOS manufacturers. Instead of a single beep code set, PhoenixBIOS codes consist of a series of beep code sets separated by a short pause. Older Phoenix BIOS Plus and PhoenixBIOS 1.x systems used a series of three sets, while the new PhoenixBIOS 4.x systems use a series of four sets. The codes listed below are only some of the more than 100 codes for the newer PhoenixBIOS 4.x. For a complete list of Phoenix BIOS POST task routines and beep codes, please visit their Web site or review your motherboard's documentation.

Number of beeps

POST routine description/problem

Troubleshooting recommendation

1

One short beep before boot

Normal operation

1-1-1-3

Verify real mode

A problem exists with the CPU and/or motherboard. Check and replace if necessary.

1-1-2-1

Get CPU type

A problem exists with the CPU and/or motherboard. Check and replace if necessary.

1-1-2-3

Initialize system hardware

A problem exists with the motherboard. Check and replace if necessary.

1-1-3-1

Initialize chipset with initial POST values

A problem exists with the motherboard. Check and replace if necessary.

1-1-3-2

Set IN POST flag

A problem exists with the motherboard. Check and replace if necessary.

1-1-3-3

Initialize CPU registers

A problem exists with the CPU and/or motherboard. Check and replace if necessary.

1-1-4-3

Initialize I/O component

A problem exists with the I/O port hardware or a device connected to an I/O port. It could also be an expansion device in the PC or the motherboard.

1-2-2-1

Initialize keyboard controller

An error has occurred with the keyboard or keyboard controller. Try a new keyboard or replace the keyboard controller on the motherboard.

1-2-2-3

BIOS ROM checksum

Replace either the BIOS ROM chip or the motherboard.

1-2-3-3

8237 DMA controller initialization

Check the motherboard and any expansion cards that use DMA.

1-3-1-1

Test DRAM refresh

Check the first bank of memory and the motherboard.

1-3-1-3

Test 8742 keyboard controller

An error has occurred with the keyboard or keyboard controller. Try a new keyboard or replace the keyboard controller on the motherboard.

1-3-4-1

RAM failure on line xxxx

Check the first bank of memory and the motherboard.

1-3-4-3

RAM failure on data bits xxxx of low byte memory bus

Check the first bank of memory and the motherboard.

2-1-3-1

Check video configuration against CMOS

Check the video card or video card memory.

2-1-3-2

Initialize PCI bus and devices

A problem exists with the I/O port hardware or a device connected to an I/O port. It could also be an expansion device in the PC or the motherboard.

2-2-1-3

Test keyboard

An error has occurred with the keyboard or keyboard controller. Try a new keyboard or replace the keyboard controller on the motherboard.

2-2-3-1

Test for unexpected interrupts

Check for a faulty motherboard or expansion card.

3-1-2-1

Detect and install external parallel ports

A problem exists with the I/O port hardware or a device connected to an I/O port. It could also be an expansion device in the PC or the motherboard.

3-1-4-1

Initialize floppy controller

Check your hard drive(s), floppy drive(s), and motherboard.

3-2-1-1

Initialize hard-disk controllers

Check your hard drive(s), floppy drive(s), and motherboard.

3-2-1-2

Initialize local-bus hard-disk controllers

Check your hard drive(s), floppy drive(s), and motherboard.

3-3-1-1

Set time of day

Check the motherboard's real-time clock (RTC).

4-2-4-3

Keyboard controller failure

An error has occurred with the keyboard or keyboard controller. Try a new keyboard or replace the keyboard controller on the motherboard.

 

 

Dell BIOS beep codes
http://support.dell.com/us/en/home.asp

Because Dell uses motherboards and BIOSs from several manufacturers, their computers use a variety of beep codes. Instead of listing each model's beep codes, links are provided to the support pages of several popular Dell desktops.

Model

System codes and messages link

Dimension 900

http://docs.us.dell.com/docs/systems/dcaydim2/codemess.htm

Dimension 2100

http://docs.us.dell.com/docs/systems/dim2100/codemess.htm

Dimension 4100

http://docs.us.dell.com/docs/systems/dzuul/codemess.htm

Dimension 4200

http://docs.us.dell.com/docs/systems/dim4200/codes.htm

Dimension 4300

http://docs.us.dell.com/docs/systems/dim4300/codes.htm

Dimension 4300S

http://docs.us.dell.com/docs/systems/dim4300s/codes.htm

Dimension 4400

http://docs.us.dell.com/docs/systems/dim4400/codes.htm

Dimension 8100

http://docs.us.dell.com/docs/systems/dsleest/codemess.htm

Dimension 8200

http://docs.us.dell.com/docs/systems/dim8200/codes.htm

Dimension C

http://docs.us.dell.com/docs/systems/dcaydim/codemess.htm

Dimension L

http://docs.us.dell.com/docs/systems/dmum/codemess.htm

Dimension Lxxxc

http://docs.us.dell.com/docs/systems/dcol/codemess.htm

Dimension P133a, P166a, M166a, M200a, and M233a

http://docs.us.dell.com/docs/systems/dhanplus/post.htm

Dimension XPS Txxx and Txxxr

http://docs.us.dell.com/docs/systems/dkub/codemess.htm

Dimension Vxxx and Vxxxc

http://docs.us.dell.com/docs/systems/dwill/post.htm

Dimension XPS B Series

http://docs.us.dell.com/docs/systems/dmag/codemess.htm

Dimension XPS Dxxx

http://docs.us.dell.com/docs/systems/dalex/post.htm

Dimension XPS H233 and XPS H266

http://docs.us.dell.com/docs/systems/dcor/post.htm

Dimension XPS P60 FS

http://docs.us.dell.com/docs/dta/xpsp60f/00000015.htm

Dimension XPS P60 M

http://docs.us.dell.com/docs/dta/xpsp60m/00000014.htm

Dimension XPS 50/66 FS

http://docs.us.dell.com/docs/dta/xps_f/00000021.htm

Dimension XPS 50/66 MDT (V4xxV)

http://docs.us.dell.com/docs/dta/xps_m/00000025.htm

Dimension XPS Rxxx

http://docs.us.dell.com/docs/systems/dkhan/post.htm

OmniPlex 5xx/ME

http://docs.us.dell.com/docs/dta/omni5xx/00000051.htm

OptiPlex G1

http://docs.us.dell.com/docs/systems/ddur/beep.htm

OptiPlex GC

http://docs.us.dell.com/docs/systems/opgc/en/ug/messages.htm

OptiPlex Gn and Gn+

http://docs.us.dell.com/docs/systems/dthred/beep.htm

OptiPlex GX1

http://docs.us.dell.com/docs/systems/ban_gx1/beep.htm

OptiPlex GX1 Small-Form-Factor

http://docs.us.dell.com/docs/systems/ban_gx1/en/ug_sdt/messages.htm

OptiPlex GX1p

http://docs.us.dell.com/docs/systems/d_gx1p/beep.htm

OptiPlex GXi

http://docs.us.dell.com/docs/systems/dzer/beep.htm

OptiPlex GX100, GX110, GX200, and GX300

http://support.dell.com/us/en/kb/document.asp?DN=1040268

OptiPlex GX110

http://docs.us.dell.com/docs/systems/opgx110/en/ug/messages.htm

OptiPlex GX115

http://docs.us.dell.com/docs/systems/opgx115/en/ug/messages.htm

OptiPlex GXa

http://docs.us.dell.com/docs/systems/dfuj/beep.htm

OptiPlex GXpro

http://docs.us.dell.com/docs/systems/dstrmlk/postbeep.htm

OptiPlex N

http://docs.us.dell.com/docs/systems/dkill/beep.htm

OptiPlex NX

http://docs.us.dell.com/docs/systems/dfujnx/beep.htm

OptiPlex NX1

http://docs.us.dell.com/docs/systems/ban_nx1/beep.htm

OptiPlex XMT575/590/5100/5120/5133

http://docs.us.dell.com/docs/dta/586xmt/00000038.htm

Precision WorkStation 210

http://docs.us.dell.com/docs/systems/daftshk/beep.htm

Precision WorkStation 340

http://docs.us.dell.com/docs/systems/ws340/en/ug/codes.htm

Precision WorkStation 400

http://docs.us.dell.com/docs/systems/dtor/beep.htm

Precision WorkStation 410

http://docs.us.dell.com/docs/systems/deqkmt/beep.htm

Precision WorkStation 420

http://docs.us.dell.com/docs/systems/ws420/en/ug/messages.htm

Precision WorkStation 530

http://docs.us.dell.com/docs/systems/ws530/en/ug/html/2codes.htm

Precision WorkStation 610 Mini Tower

http://docs.us.dell.com/docs/systems/dvol/beep.htm

Precision WorkStation 620

http://docs.us.dell.com/docs/systems/ws620/en/ug/messages.htm

Precision WorkStation 730

http://docs.us.dell.com/docs/systems/ws730/ug/messages.htm

 

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