Lenovo 3822, 3821, 3719, 3823 manual Led

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

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

Lit EasyLED
diagnostics LED with
the system-error or
information LED also
lit	Description	Action
CPU 2 error LED	Microprocessor 2 has failed, is	1. Check the system-event log to determine the
	missing, or has been incorrectly
			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; see “Removing a
	microprocessor and heat sink” on		microprocessor.
	page 218	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
CPU mismatch LED	A mismatched microprocessor has	1. Run the Setup Utility and view the microprocessor
	been installed.
			information to compare the installed
	Note: All microprocessors must
			microprocessor specifications.
	have the same speed and cache
		2. (Trained service technician only) Remove and
	size.
			replace one of the microprocessors so that they
			both match.
VRM failure LED	Microprocessor 2 VRM has failed or	1.	Reseat the VRM
	is incorrectly installed.	2. Replace the following components one at a time,
			in the order shown, restarting the server each time:
			a. VRM
			b. (Trained service technician only) System board
		3.	Replace the VRM
System-board error	System-board CPU VRD, power	(Trained service technician only) Replace the system
LED	voltage regulators, or both 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, do the
	When the server is connected to	following:
		1. (Trained service technician only) Use the IMM
	power this LED flashes quickly to
			recovery switch to recover the firmware (see
	indicate that the IMM code is
			“System-board switches and jumpers” on page
	loading. When the loading is
			133).
	complete, the LED stops flashing
		2. (Trained service technician only) Replace the
	briefly and then flashes slowly to
			system board.
	indicate that the IMM if fully
	operational and you can press the
	power-control button to start the
	server.

Chapter 6. Locating Server Controls and connectors 137