Lenovo 3797 manual Power-supply diagnostics

Table 15. EasyLED panel LEDs (continued)

LED	Description	Action
CPU	A microprocessor has	1.	Make sure that the failing microprocessor,
	failed.
			which is indicated by a lit LED on the
			system board, is install correctly.
		2.	(Trained service technician only) Replace
			the microprocessor.
DASD	A hard disk drive error has	1.	Check the LEDs on the hard disk drives and
	occurred.		replace the hard disk drive with the lit LED.
		2.	Replace the hard disk drive backplane.
RAID	A RAID controller error	1.	Make sure that a RAID controller is installed
	has occurred.
			correctly.
		2.	Check the system-error log for information
			about the error.
BRD	An error has occurred on	1.	Check the LEDs on the system board to
	the system board.
			identify the component that caused the error.
		2.	Check the system-error log for information
			about the error.

Power-supply diagnostics

The following illustration shows the power-supply LEDs on the rear of the server. For more information about solving power-supply problems, see the Hardware Maintenance Manual.

1 AC power LED (green)
2 DC power LED (green)

3 Power-supply error LED (amber)

The following table describes the problems that are indicated by various combinations of the power-supply LEDs and the power-on LED on the operator information panel and suggested actions to correct the detected problems.

148ThinkServer RD220 Types 3729, 3779, 3797, and 3798: Installation and User Guide