Lenovo RS210 manual

3.Remove the server cover and look inside the server for lit LEDs. Certain components inside the server have LEDs that will be lit to indicate the location of a problem. For example, a DIMM error will light the LED next to the failing DIMM on the system board.

Look at the system service label inside the side cover of the server, which gives an overview of internal components. This information can often provide enough information to correct the error.

The following table describes the LEDs on the system board and PCI extender cards and suggested actions to correct the detected problems.

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

vSee Chapter 7, “Parts listing, RS210 Types 6531, 6532, 6533, and 6534,” on page 177 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.

Component LED	Description	Action
DIMM error LEDs	A memory DIMM has failed or is	1.	Remove the DIMM that has the lit error LED.
	incorrectly installed.
		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 error LEDs	Microprocessor has failed, is	1.	Check the system-event log to determine the
	missing, or has been incorrectly
			reason for the lit LED.
	installed.
		2.	(Trained service technician) Reseat the failing
	Note: (Trained service technician
			microprocessor
	only) Make sure that the
		3.	Replace the following components one at a time,
	microprocessor is installed correctly;
	see “Installing the microprocessor”		in the order shown, restarting the server each
	on page 141.		time:
			a. (Trained service technician only) Failing
			microprocessor
			b. (Trained service technician only) System board
System-board error	System-board CPU VRD and/or	(Trained service technician only) Replace the system
LED	power voltage regulators have	board.
	failed.
Battery failure LED	Battery low.	1.	Replace the CMOS lithium battery, if necessary.
		2. (Trained service technician only) Replace the
			system board.
IMM heartbeat LED	Indicates the status of the boot	If the LED does not begin flashing within 30 seconds
	process of the IMM.	of when the server is connected to power, complete
	When the server is connected to	the following steps:
		1.	(Trained service technician only) Rerecover the
	power this LED flashes quickly to
			firmware (see “Recovering the server firmware”
	indicate that the IMM code is
			on page 100).
	loading. When the loading is
		2. (Trained service technician only) Replace the
	complete, the LED stops flashing
			system board.
	briefly and then flashes slowly to
	indicate that the IMM if fully
	operational and you can press the
	power-control button to start the
	server.

66ThinkServer ThinkServer RS210, Types 6531, 6532, 6533, and 6534: Hardware Maintenance Manual