5 Power-On Self-Test and Error Messages

Beep Codes

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 PatternBeep

Numeric

Description

 

Code

Code

 

 

 

 

 

 

 

 

—

- - - - - - -

1-2-2-3

16h

BIOS ROM check-sum failure

 

 

 

 

 

—

- - - — —

1-3-1-1

20h

DRAM refresh test failure

 

 

 

 

 

—

- - - — - - -

1-3-1-3

22h

8742 Keyboard controller test failure

 

 

 

 

 

—

- - - - - - - —

1-3-4-1

2Ch

RAM failure on address line xxxx1

—

- - - - - - - - - -

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

 

 

 

 

 

—

- -

1-2

98h

Video configuration failure or option ROMs check-sum

 

 

 

 

failure

 

 

 

 

 

- -

- - - - - - - - - - - -

4-4-2-4

F7

Crisis Recovery Failure

 

 

 

 

 

-

 

1

B4h

This does not indicate an error. There is one short beep

 

 

 

 

before system startup.

 

 

 

 

 

1.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.

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