Lenovo 3719, 3821, 3822, 3823 manual Vrm

Server processor bus	Power supply
Microprocessor	Fan
VRM	PCI bus
Microprocessor/memory configuration	System board
Memory	Temperature
NMI	System-event log
Hard disk drive/RAID	USB ports

The following table lists the EasyLED diagnostics LEDs, the problems that they indicate, and actions to solve the problems.

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

vSee the Chapter 8, “Parts Listing, TD200x Machine Types 3719, 3821, 3822, and 3823,” on page 237 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 EasyLED
diagnostics LED with
the system-error or
information LED also
lit	Description	Action
System-event log	A system error occurred.	View the contents of the system-event log (see “Event
(LOG)		logs” on page 27).
Temperature	The system temperature has	1. See the system-event log for the source of the
	exceeded a threshold level.
		fault (see “System-event log” on page 38).
		2. Make sure that the airflow in the server is not
		blocked.
		3. Make sure that the room temperature is neither too
		hot nor too cold (see “Environment” in
		“Specifications” on page 17).

78ThinkServer TD200x Types 3719, 3821, 3822, and 3823: Hardware Maintenance Manual