IBM X23, X24, X22, X20, X21 manual Beep symptoms, No beep symptoms

Hibernation error	1.	Restore the system
		configuration to what it
		was the before the
		computer entered
		hibernation mode.
	2.	If memory size has been
		changed, re-create the
		hibernation file.
Operating system not found	1.	Reseat the hard disk
		drive.
	2.	Check the boot sequence
		by use of IBM BIOS Setup
Fan error	1.	Fan.

Beep symptoms

Symptom or error	FRU or action, in sequence
One beep and a blank,	1.	Reseat the LCD
unreadable, or flashing LCD
		connector.
	2.	LCD assembly.
	3.	System board.
One long and two short beeps,	1.	System board.
and a blank or unreadable LCD
	2.	LCD assembly.
Two short beeps with error	POST error. See “Numeric
codes	error codes” on page 48
Two short beeps with blank	1.	System board.
screen
Only cursor appears	1.	Reinstall operating
		system.

No beep symptoms

Symptom or error	FRU or action, in sequence
No beep, power-on indicator	1.	Make sure that every
on, LCD blank, and no POST
		connector is connected
		tightly and correctly.
	2.	DIMM.
	3.	System board.
No beep, power-on indicator	1.	Reseat DIMM.
on, and LCD blank during
	2.	System board.
POST
No beep during POST, but	1.	Speaker.
system runs correctly

Chapter 3. ThinkPad X20, X21, X22, X23, X24 51