Specifications

System BIOS and Resources

BIOS Beep Codes

Chapter 4 59

BIOS Beep Codes

If a terminal error occurs during POST, the system issues a beep

code before attempting to display the error in the upper left corner

of the screen. Beep codes are useful for identifying the error when

the system is unable to display the error message.

Beep Code Numeric

Code

Description

1-2-2-3 16h BIOS ROM checksum failure

1 B4h one short beep before boot

1-3-1-1 20h DRAM refresh test failure

1-2 98h Video conﬁguration failure or option ROMs

checksum failure

1-3-1-3 22h 8742 Keyboard controller test failure

1-3-3-1 28h Memory initialization failure

1-3-4-1 2Ch

RAM failure on address line xxxx

1-3-4-3 2Eh RAM failure on data bits xxxx1 of low byte of

memory bus

2-1-2-3 46h ROM copyright notice check failure

2-2-3-1 58h Unexpected interrupts test failure

4-4-2-4 F7 Crisis Recovery Failure

a. If the BIOS detects error 2C or 2E (base 512K RAM error), it displays an

additional word-bitmap (xxxx) indicating the address line or bits that failed. For

example, “2C 0002” means address line 1 (bit one set) has failed. “2E 1020” means

data bits 12 and 5 (bits 12 and 5 set) have failed in the lower 16 bits.