IBM QS22 - BladeCenter - 0793, Service Manual, Page: 25 / 158

This lights any error LEDs that were turned on during processing. It also lights a
green LED to indicate the capacitor is charged and the light path diagnostics
system is operating.
Figure 3 shows the location of the light path LEDs and the diagnostics switch.
Pressing the light path diagnostics switch lights the appropriate LED to indicate
where an error has occurred.
System board internal and expansion card connectors
The following illustration shows the location of the connectors for user-installable
options.
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1
Temperature fault LED
System board LED
CPU fail LED
NMI error LED
I/O buffer DIMM error LED
I/O buffer DIMM error LED
Light path
diagnosis
switch
Light path
diagnosis
LED
Modular
flash drive
error LED
System memory DIMM
error LEDs
Figure 3. System-board LEDs
Chapter 1. Introduction
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