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BIOS beep codes list for desktops

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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 Memory refresh timer error

Reseat memory or replace with known good

chips.

2 Parity error

Reseat memory or replace with known good

chips.

Base 64K memory read/write test

failure

Reseat memory or replace with known good

chips.

4 Motherboard timer not operational Repair/replace motherboard.

5 Processor error Repair/replace motherboard.

8042—gate A20 failure/Keyboard

controller BAT test error

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.

ROM checksum error/Faulty BIOS

chips

Replace chips or motherboard.

CMOS shutdown register read/write

error

Repair/replace motherboard.

11 Cache memory bad Repair/replace motherboard.

1 2 3 4 5 6 7

Indice de contenidos

Pagina 1 - AMI BIOS beep codes

Pagina 2 - PhoenixBIOS beep codes

Pagina 3

Pagina 4 - Dell BIOS beep codes

Pagina 5

Pagina 6 - HP BIOS beep codes

Pagina 7 - IBM BIOS beep codes

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