System-Board Led Locations - IBM XSERIES 255 TYPE 8685 Hardware Maintenance Manual And Troubleshooting Manual

System-board LED locations

The following illustration shows the location of the LEDs on the system board. You
might need to refer to this illustration when solving problems with the server.
PCI-X slot 5 attention (CR17)
PCI-X slot 6 attention (CR18)
PCI-X slot 7 attention (CR25)
Important: The amber CR44 LED also illuminates if the cable interface from the
system board to the light path diagnostics panel is missing or incorrectly connected.
Therefore, verify that the required cable is present and correctly connected before
you replace the light path diagnostics panel.
PCI-X slot 5 power (CR22)
PCI-X slot 6 power (CR23)
PCI-X slot 7 power (CR24)
SCSI channel A in
LVD mode (CR32)
Light Path Diagnostics
panel (CR44)
PCI-X slot 4 attention (CR16)
PCI-X slot 4 power (CR21)
PCI-X slot 3 attention (CR15)
PCI-X slot 3 power (CR20)
PCI-X slot 2 attention (CR14)
PCI-X slot 2 power (CR19)
Memory board
VRM (CR46)
ISMP activity (CR13)
SCSI channel B in
LVD mode (CR33)
Chapter 4. Customer replaceable units
VRM 4 (CR39)
Microprocessor 4
(CR30)
Microprocessor 1
(CR43)
VRM 1 (CR31)
System board
VRM (CR45)
VRM 3 (CR37)
Microprocessor 3
(CR38)
Microprocessor 2
(CR42)
VRM 2 (CR34)
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