Lenovo 3797 manual Dimm

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.

LED	Description	Action
MEM	When only the MEM LED is lit, a	1. Determine whether the CNFG LED is also lit. If it is, run the
	memory error has occurred.
		memory test exerciser to isolate the problem (see Hardware
	When the MEM and CNFG LEDs are	Maintenance Manual for more information).
		a. If the test reports that a memory error has occurred,
	lit, the memory configuration is not
		replace the failing DIMM, which is indicated by the lit
	valid.
		LED on the system board.
		b. If the test reports the memory configuration is invalid,
		repopulate the DIMMs to a supported configuration.
		2. If the CNFG LED is not lit, one of the following conditions
		should be present:
		v The server did not boot and a failing DIMM LED is lit.
		a. Check for a PFA log event in the System Event Log
		(SEL)
		b. Reseat the DIMM.
		c. If the problem remains, move the DIMM to a different
		slot.
		1) If the DIMM LED lights up on the system board
		that corresponds to this new DIMM socket,
		replace the DIMM.
		2) If the DIMM LED lights up on the system board
		that corresponds to the original DIMM socket,
		replace the system board (trained service
		technician only).
		v The server booted and the failing DIMM is disabled and
		the LED is lit.
		a. If the LEDs are lit by two DIMMs, check the System
		Event Log for PFA on one of the DIMMs, then replace
		that DIMM. Otherwise, replace both DIMMs.
		b. If the LED is lit by only one DIMM, replace that
		DIMM.
		c. Re-enable the DIMM sockets in the server firmware
		settings.
NMI	A nonmaskable interrupt has occurred,	Check the system-event log for information about the error.
	or the NMI button has been pressed.
CNFG	A hardware configuration error has
	occurred. (This LED is used with the
	MEM and the CPU LEDs.)

20ThinkServer RD220 Types 3729, 3779, 3797, and 3798: Installation and User Guide