IBM 2179 Hardware Maintenance Manual

Also see for 2179: User guide Technical information manual User guide Podręcznik użytkownika

Contents

Chapter 5. Symptom-to-FRU IndexBeep symptoms . . . . . . . . . . . . . 35Hard disk drive boot error . . . . . . . . . 36IBM Enhanced Diagnostic error codes . . . . . 37POST error codes . . . . . . . . . . . . 54Undetermined problems . . . . . . . . . . 56The Symptom-to-FRU index lists error symptoms and possible causes. The mostlikely cause is listed first. Always begin with Chapter 2, “General information,” onpage 3. This index can also be used to help you decide which FRUs to haveavailable when servicing a computer. If you are unable to correct the problemusing 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 andcheckpoint 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 includedwith the system board FRU.Beep symptomsBeep symptoms are short tones or a series of short tones separated by pauses(intervals without sound). See the following examples.Beeps Description1-2-X v One beepv A pause (or break)v Two beepsv A pause (or break)v Any number of breaks4 Four continuous beepsUse the following table to diagnose beep symptoms.Beep Symptom FRU/Action1Refresh failure 1. Run IBM Enhanced Diagnostics2. Memory module3. System board3Base 64KB memory failure 1. Memory module2. System board4Timer not operational 1. Memory module2. System board5Processor error 1. Processor2. System Board68042-Gate A20 failure 1. System Board2. Keyboard© Copyright IBM Corp. 2004 35