IBM System x3755 Types 7163 Installation Manual page 65

v If the system-error LED is lit, it indicates that there is a fault or condition in
the server and that light path diagnostics might light an additional LED to help
diagnose the problem.
The following illustration shows the operator information panel.
Locator LED
Hard disk drive activity LED
Power-on LED
Power-control button
2. Light path diagnostics panel: To access the light path diagnostics panel,
press the release latch on the front of the operator information drawer to the
left; then, slide it forward. Note any LEDs that are lit, and then close the drawer.
OVER SPEC
REMIND
3. LEDs on server components: Remove the top cover to look inside the server
for lit LEDs. To identify the component that is causing the error, note the lit LED
on or next to the component. For example, a microprocessor/memory card error
will light the LED on top of the microprocessor/memory card.
The following illustration shows the LEDs on the I/O board.
Light Path
Diagnostics
PS1 PS2
CPU CNFG
MEM NMI
S ERR
SP DASD RAID
FAN TEMP
BRD
PCI
Information LED
System-error LED
Release latch
USB connectors
Chapter 6. Solving problems
53