Blade Server Light Path Diagnostics Leds - IBM 7870B4U Service Manual

Blade server light path diagnostics LEDs

Use this information to diagnose and resolve possible errors displayed by the light
path diagnostic LEDs.
The following table describes the LEDs on the light path diagnostics panels, on the
system board, and on the optional expansion unit and suggested actions to correct
the detected problems.
v Follow the suggested actions in the order in which they are listed in the Action column until the problem is
solved.
v See Chapter 4, "Parts listing," on page 41 to determine which components are CRUs and which components
are FRUs.
v If an action step is preceded by "(Trained service technician only)," that step must be performed only by a
trained service technician.
Lit light path
diagnostics LED Description
None An error has occurred and cannot be isolated,
or the service processor has failed.
Battery error The system battery is not installed or is not
working.
DIMM x error A memory error occurred.
LP1 v LP1 LED on system board: system-board
assembly light path diagnostic LEDs have
power.
v LP1 LED on optional expansion unit: check
light path LEDs on the system board.
LP2 Light path diagnostic LEDs on the optional
expansion unit have power.
(optional
expansion unit
only)
Action
1. Make sure that the light path diagnostics
LED is lit, to ensure that there is enough
power in the blade server to light the rest
of the LEDs. See "Viewing the light path
diagnostics LEDs in the blade server" on
page 183.
2. Check the BMC log for information about
an error that is not represented by a light
path diagnostics LED. See "Using the
Setup utility" on page 21.
1. Reseat the battery. See "Removing the
battery" on page 58 and "Installing the
battery" on page 60.
2. Replace the battery. See "Removing the
battery" on page 58 and "Installing the
battery" on page 60.
Look for system-event and IMM/AMM logs
related to memory and resolve those events
(see "IMM error messages" on page 105 and
"POST error codes" on page 146).
Check for error LEDs that are lit on the
system-board assembly. See "Viewing the light
path diagnostics LEDs in the blade server" on
page 183.
Check for error LEDs that are lit on the
optional expansion unit. See "Viewing the
light path diagnostics LEDs in the blade
server" on page 183.
Chapter 6. Diagnostics
185