Lenovo L412, L512 manual Error messages, No-beep symptoms

Error messages

Table 3. Error messages

Symptom or error (beeps, if any)	FRU or action, in sequence
Bad CRC2. Enter BIOS Setup Utility, and	Press F1 to enter BIOS Setup Utility. Press
load Setup defaults.	F9, and Enter to load the default setting.
(two short beeps)	Then save the current setting by pressing
	F10, and restart the computer.
Fan error.	1.	Fan.
(four short beeps, one long beep)	2.	Thermal grease.
	3.	System board.
DRAM is unplugged.	Install the DRAM.
(four short beeps, pause, three short beeps,
pause, one short beep, pause, one short
beep)
DRAM is not well plugged.	Reinstall the DRAM.
(seven short beeps, one long beep, four short
beeps, one long beep, one short beep, one
long beep, one short beep, one long beep till
forever.)
Operating system not found.	1.	Check that the operating system has no
		failure and is installed correctly.
	2.	Enter BIOS Setup Utility and see whether
		the hard disk drive is properly identified.
		If you still see the same error message,
		check the boot sequence.
	3.	Reinstall the hard disk drive.
	4.	Reinstall the operating system.
Unauthorized WAN card is plugged in	Turn off the computer and remove the
Power off and remove the WAN card.	WAN card.
System Configuration Data Read Error	Press F1 to enter BIOS Setup Utility. Press
(two short beeps)	F9, and Enter to load the default setting.
	Then save the current setting by pressing
	F10, and restart the computer.

No-beep symptoms

Table 4. No-beep symptoms

Symptom or error	FRU or action, in sequence
No beep, power-on indicator on, LCD blank,	1.	Make sure that every connector is
and no POST.		connected tightly and correctly.
	2.	DIMM.
	3.	System board.
No beep, power-on indicator on, and LCD	1.	Reseat DIMM.
blank during POST.
	2.	System board.
The power-on password prompt appears.	A power-on password or a supervisor
	password is set. Type the password and
	press Enter.
The hard-disk password prompt appears.	A hard-disk password is set. Type the
	password and press Enter.

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