
Contents
Safety ............................v
Guidelines for trained service technicians ...............vi
Inspecting for unsafe conditions ..................vi
Guidelines for servicing electrical equipment .............vi
Safety statements ........................vii
Chapter 1. Introduction ......................1
Related documentation ......................1
Notices and statements in this document ................2
LS20 Type 8850 specifications for non-NEBS/ETSI environments .......3
Blade server control panel buttons and LEDs ..............4
Turning on the blade server.....................6
Turning off the blade server.....................6
System-board layouts .......................7
System-board connectors ....................7
System-board jumpers .....................7
System-board LEDs ......................8
Chapter 2. Diagnostics ......................9
Diagnostic tools .........................9
POST.............................9
POST beep codes .......................9
Error logs ..........................17
POST error codes .......................19
Checkout procedure .......................26
About the checkout procedure ..................26
Performing the checkout procedure ................27
Troubleshooting tables ......................27
CD or DVD drive problems ...................28
Diskette drive problems.....................29
General problems .......................29
Hard disk drive problems ....................30
Intermittent problems......................30
Keyboard, mouse, or pointing-device problems ............31
Memory problems .......................32
Microprocessor problems ....................32
Monitor or video problems ....................33
Network connection problems ..................34
Optional-device problems ....................35
Power error messages .....................35
Power problems .......................37
ServerGuide problems .....................38
Service processor problems ...................39
Software problems ......................39
Universal Serial Bus (USB) port problems ..............39
Light path diagnostics ......................40
Viewing the light path diagnostics LEDs...............40
Light path diagnostics LEDs ...................42
Diagnostic programs, messages, and error codes ............43
Running the diagnostic programs .................43
Diagnostic text messages ....................44
Viewing the test log ......................45
Diagnostic error codes .....................45
© Copyright IBM Corp. 2005 iii