Lenovo THINKSERVER 3821 - Manual (Page 93)

The system board is equipped with a PCI extender card that provides either one
or two additional expansion slots. The following illustration shows the LEDs on
the PCI Express extender card, if one is installed.
The following illustration shows the LEDs on the PCI-X extender card, if one is
installed.
The following table describes the LEDs on the system board and extender card
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 8, “Parts Listing, TD200x Machine Types 3719, 3821, 3822, and 3823,” on page 237 to
determine which components are customer replaceable units (CRU) and which components are field
replaceable units (FRU).
v If an action step is preceded by “(Trained service technician only),” that step must be performed only by a
trained service technician.
Lit EasyLED
diagnostics LED with
the system-error or
information LED also
lit
Description Action
DIMM 1 to DIMM 16
error LEDs A DIMM has failed or is incorrectly
installed.
1. Remove the DIMM that is indicated by a lit error
LED.
2. Reseat the DIMM.
3. Replace the following components one at a time,
in the order shown, restarting the server each time:
a. DIMM
b. (Trained service technician only) System board
CPU 1 error LED Microprocessor 1 has failed, is
missing, or has been incorrectly
installed.
Note: (Trained service technician
only) Make sure that the
microprocessors are installed in the
correct sequence; see “Installing a
microprocessor and heat sink” on
page 220. 1. Check the system-event log to determine the
reason for the lit LED.
2. (Trained service technician) Reseat the failing
microprocessor.
3. Replace the following components one at a time,
in the order shown, restarting the server each time:
a. (Trained service technician only) Failing
microprocessor
b. (Trained service technician only) System board
Chapter 5. Diagnostics 85