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BIOS Beep Codes

If a hardware problem occurs the computer may emit a number of beeps from the

speaker. These are known as beep codes. The pitch and duration of the beep

codes may vary but there will always be a set number of beeps. These beeps stem

from the BIOS’s initial check on the system and will normally occur in the first few

seconds of power on.

Beeps codes represent a terminal error. If the BIOS detects a terminal error

condition, it outputs an error beep code, halts the POST, and attempts to display a

port 80h code on a POST card’s LED display.

Table 6

Beeps Description

1 One short beep before boot

1-2 Search for option ROM’s. One long, two short beeps on

checksum failure

1-2-2-3 BIOS ROM checksum

1-3-1-1 Test DRAM refresh, problem with memory on baseboard

1-3-1-3 Test 8742 keyboard controller

1-3-4-1 Memory error at address line XXXX

1-3-4-3 RAM failure on data bits XXXX of low byte of memory bus

2-1-2-3 ROM copyright notice failure

2-2-3-1 Test for unexpected interrupt

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Viglen L440GX+ Technical Information Seite 34