IBM Type 7977 Lit light path, diagnostics LED with, the system-error or, information LED also

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

vSee the Problem Determination and Service Guide on the IBM System x Documentation CD 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.

Lit light path
diagnostics LED with
the system-error or
information LED also
lit	Description	Action
TEMP	A system temperature or component	1.	See the BMC log or the system-error log (see the
	has exceeded specifications.		Problem Determination and Service Guide on the
	Note: A fan LED might also be lit.
			IBM System x Documentation CD) for the source
			of the fault.
		2.	Make sure that the airflow in the server is not
			blocked.
		3.	If a fan LED is lit, reseat the fan.
		4.	Replace the fan for which the LED is lit.
		5.	Make sure that the room is neither too hot nor too
			cold (see “Environment” in “Features and
			specifications” on page 5).
CPU	A microprocessor has failed, is	1.	Check the BMC log or the system-error log to
	missing, or has been incorrectly
			determine the reason for the lit LED.
	installed.
		2.	Find the failing, missing, or mismatched
	Note: (Trained service technician
			microprocessor by checking the LEDs on the
	only) Make sure that the
			system board.
	microprocessors are installed in the
		3.	(Trained service technician) Reseat the failing
	correct sequence.
			microprocessor.
		4.	Replace the following components one at a time,
			in the order shown, restarting the server each time:
			a. (Trained service technician only) Failing
			microprocessor
			b. (Trained service technician only) System board
S_ERR	Reserved
VRM	A dc-dc regulator has failed or is	1.	Check the BMC log or the system-error log to
	missing.
			determine the reason for the lit LED (for a VRM).
	Note: This error is for either the
		2.	Find the failing or missing VRM by checking the
	VRM or integrated VRD. If the VRD
			LEDs on the system board.
	has failed, the system board must
		3.	Install any missing VRMs.
	be replaced by an trained service
	technician.	4.	Reseat the following components:
			a. Failing VRM
			b. (Trained service technician only)
			Microprocessor associated with the VRM
		5.	Replace the following components one at a time,
			in the order shown, restarting the server each time:
			a. Failing VRM
			b. (Trained service technician only)
			Microprocessor associated with the VRM
			c. (Trained service technician only) System board

92IBM System x3500 Type 7977: Installation Guide