Lenovo 6435, 6438, 6437, 6436 Memory problems, Microprocessor problems, Hardware Maintenance Manual

Memory problems

vFollow the suggested actions in the order in which they are listed in the Action column until the problem is solved.

vSee the parts listing in the Hardware Maintenance Manual to determine which components are customer replaceable units (CRU) and which components are field replaceable units (FRU).

vIf an action step is preceded by “(Trained service technician only),” that step must be performed only by a trained service technician.

Symptom	Action
The amount of system memory	1.	Make sure that:
that is displayed is less than the
		v No error LEDs are lit on the operator information panel.
amount of installed physical
		v The memory modules are seated correctly.
memory.
		v You have installed the correct type of memory (see “Installing a memory
		module” on page 14).
		v All banks of memory are enabled. The server might have automatically
		disabled a memory bank when it detected a problem.
	2.	Check the system event/error log for error message 289 (see “Using the
		Configuration/Setup Utility program” on page 34); if a DIMM was disabled by a
		systems-management interrupt (SMI), replace the DIMM.
	3.	Run memory diagnostics (see “Running the diagnostic programs” in the
		Hardware Maintenance Manual ).
	4.	Add one pair of DIMMs at a time, making sure that the DIMMs in each pair
		match.
	5.	Reseat the DIMMs.
	6.	Replace the following components one at a time, in the order shown, restarting
		the server each time:
		a. DIMMs
		b. (Trained service technician only) System board

Microprocessor problems

vFollow the suggested actions in the order in which they are listed in the Action column until the problem is solved.

vSee the parts listing in the Hardware Maintenance Manual to determine which components are customer replaceable units (CRU) and which components are field replaceable units (FRU).

vIf an action step is preceded by “(Trained service technician only),” that step must be performed only by a trained service technician.

Symptom	Action
The server emits a continuous	1.	Correct any errors that are indicated by the LEDs (see “System-board LEDs” in
beep during POST, indicating
		the Hardware Maintenance Manual ).
that the microprocessor is not
	2.	Make sure that the server supports the microprocessor.
working correctly.
	3.	(Trained service technician only) Make sure that the microprocessor is seated
		correctly.
	4.	(Trained service technician only) Replace the microprocessor.

Chapter 5. Solving problems 49