Lenovo X61S manual Fan, Check the status of device which you want, To boot from

Symptom-to-FRU index

Symptom or error	FRU or action, in sequence
Fan error.	1.	Fan.
	2.	Thermal grease.
	3.	System board.
Thermal sensing error.	System board.
Cannot boot from any device.	Check the status of device which you want
	to boot from.
	Device not found.
	1.	The device you want to boot from.
	2.	System board.
	Device Error.
	1.	The device you want to boot from.
	2.	System board.
	No valid operating system.
	1.	Check that the operating system has no
		failure and is installed correctly.
	2.	Reinstall the operation system.
	Excluded from boot order.
	v Enter the BIOS Setup Utility and add the
		device in boot order.

52ThinkPad® X60, X60s, X61, and X61s