Lenovo RD210 manual Memory problems

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 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 Memory mirroring does not account for the discrepancy.
memory.
		v The memory modules are seated correctly.
		v You have installed the correct type of memory.
		v If you changed the memory, you updated the memory configuration in the
		UEFI Setup Utility program.
		v All banks of memory are enabled. The server might have automatically
		disabled a memory bank when it detected a problem, or a memory bank
		might have been manually disabled.
	2.	Check the POST error log for error message 289:
		v If a DIMM was disabled by a systems-management interrupt (SMI), replace
		the DIMM.
		v If a DIMM was disabled by the user or by POST, run the UEFI Setup Utility
		program and enable the DIMM.
	3.	Run memory diagnostics (see “POST” on page 142).
	4.	Make sure that there is no memory mismatch when the server is at the
		minimum memory configuration (two 1 GB DIMMs).
	5.	Add one pair of DIMMs at a time, making sure that the DIMMs in each pair
		match.
	6.	Reseat the DIMM.
	7.	Restart the server.
Multiple rows of DIMMs in a	1.	Reseat the DIMMs; then, restart the server.
branch are identified as failing.
	2.	Remove the lowest-numbered DIMM pair of those that are identified and
		replace it with an identical pair of known good DIMMs; then, restart the server.
		Repeat as necessary. If the failures continue after all identified pairs are
		replaced, go to step 4.
	3.	Return the removed DIMMs, one pair at a time, to their original connectors,
		restarting the server after each pair, until a pair fails. Replace each DIMM in the
		failed pair with an identical known good DIMM, restarting the server after each
		DIMM. Replace the failed DIMM. Repeat step 3 until you have tested all
		removed DIMMs.
	4.	Replace the lowest-numbered DIMM pair of those identified; then, restart the
		server. Repeat as necessary.
	5.	(Trained service technician only) Replace the system board.

Chapter 7. Solving problems 149