Light Path Diagnostics - Lenovo BladeCenter HX5 7873 Problem Determination And Service Manual

• Follow the suggested actions in the order in which they are listed in the Action column until the problem is
solved.
• See "Parts listing - BladeCenter HX5" on page 57 to determine which components are CRUs and which
components are FRUs.
• If an action step is preceded by "(Trained service technician only)," that step must be performed only by a
trained service technician.
Type Error Message
Error Group 1, memory (Critical Int DIM)
bus uncorrectable error
Error Sub-chassis 1, (Critical Int EXA) bus
uncorrectable error

Light path diagnostics

Use this information as an overview of light path diagnostics.
Light path diagnostics is a system of LEDs on the control panel and on various internal components of the
blade server. When an error occurs, LEDs can be lit throughout the blade server to help identify the source of
the error.
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BladeCenter HX5 Blade ServerProblem Determination and Service Guide
Action
1. Check the event logs for other memory errors that might
occur (see "Event logs" on page 147).
2. Reseat all of the memory modules in the blade server (see
"Removing a DIMM - BladeCenter HX5" on page 103 and
"Installing a DIMM - BladeCenter HX5" on page 104).
3. Make sure all of the memory is enabled in the Setup utility
(see "Using the Setup utility" on page 20). Notice which
memory modules are disabled before you continue to the
next step.
4. Replace the memory modules that were disabled in the
Setup utility (see "Removing a DIMM - BladeCenter HX5"
on page 103 and "Installing a DIMM - BladeCenter HX5"
on page 104).
5. (Trained service technician only) Replace the
microprocessor that controls the failing memory module.
Note: DIMM connectors 1 through 8 are controlled by the
first microprocessor and DIMM connectors 9 through 16
are controlled by the second microprocessor.
See "Removing a microprocessor and heat sink" on page
130 and "Installing a microprocessor and heat sink" on
page 134.
6. (Trained service technician only) Replace the system-
board assembly (see "Removing the system-board
assembly - BladeCenter HX5" on page 140 and "Installing
the system-board assembly - BladeCenter HX5" on page
142).
1. Check the IBM MAX5 expansion blade for any lit error
LEDs.
2. Reseat the IBM MAX5 expansion blade (see "Removing an
IBM MAX5 expansion blade" on page 87 and "Installing an
IBM MAX5 expansion blade" on page 88).
3. If the error still occurs, replace the IBM MAX5 expansion
blade (see "Removing an IBM MAX5 expansion blade" on
page 87 and "Installing an IBM MAX5 expansion blade" on
page 88).