IBM 2179, 6643 manual Symptom-to-FRU Index, Beep symptoms

Chapter 5. Symptom-to-FRU Index

Beep symptoms	. . .	.	.	35	POST error codes . . . .	.	. . . . . .	.	54
Hard disk drive boot error . . . .	. . .	.	.	36	Undetermined problems . .	.	. . . . . .	.	56
IBM Enhanced Diagnostic error codes	. . .	.	. 37

The Symptom-to-FRU index lists error symptoms and possible causes. The most likely cause is listed first. Always begin with Chapter 2, “General information,” on page 3. This index can also be used to help you decide which FRUs to have available when servicing a computer. If you are unable to correct the problem using this index, go to “Undetermined problems” on page 56.

Important:

1.Types 2179 and 6643 computers come up quiet (no beep and no memory count and checkpoint code display) when no errors are detected.

2.Use Beep codes and the IBM Enhanced Diagnostics to diagnose and fix problems.

3.The processor is a separate FRU from the system board; the processor is not included with the system board FRU.

Beep symptoms

Beep symptoms are short tones or a series of short tones separated by pauses (intervals without sound). See the following examples.

Beeps	Description
1-2-X	v	One beep
	v A pause (or break)
	v	Two beeps
	v A pause (or break)
	v	Any number of breaks
4	Four continuous beeps

Use the following table to diagnose beep symptoms.

Beep Symptom	FRU/Action
1	1.	Run IBM Enhanced Diagnostics
Refresh failure
	2.	Memory module
	3.	System board
3	1.	Memory module
Base 64KB memory failure
	2.	System board
4	1.	Memory module
Timer not operational
	2.	System board
5	1.	Processor
Processor error
	2.	System Board
6	1.	System Board
8042-Gate A20 failure
	2.	Keyboard

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