Lenovo L412, L512 manual Contents

Contents

About this manual	. v		No-beep symptoms		.	65
			LCD-related symptoms		.	66
Safety information	.	1	Intermittent problems		.	67
General safety	.	2	Undetermined problems		.	67
Electrical safety	.	3	Status indicators		.	69
Safety inspection guide	.	5
Handling devices that are sensitive to electrostatic			Fn key combinations		.	71
discharge	.	6
Grounding requirements	.	6
Safety notices (multilingual translations) . . . .	.	7	FRU replacement notices		.	75
Laser compliance statement (multilingual			Screw notices		.	75
translations)		28
			Retaining serial numbers		.	76
Important service information	39		Restoring the serial number of the system unit			76
			Retaining the UUID		.	76
Strategy for replacing FRUs	. 39		Reading or writing the ECA information . .		. 77
Strategy for replacing a hard disk drive . . . . 40
Important notice for replacing a system board .	. 40		Removing and replacing a FRU . . .		. 79
How to use error message	.	40	1010	Battery pack	.	80
Strategy for replacing FRUs for CTO, CMV, and
			1020	ExpressCard blank bezel and Media Card
GAV	.	41
			blank bezel		.	82
Product definition	.	41
			1030	Optical drive or travel cover	.	84
FRU identification for CTO, CMV, and GAV
			1040	Thermal cover	.	85
products	.	41
			1050	Hard disk drive (HDD) assembly . . . .	. 86
General checkout	43		1060	DIMM	.	88
			1070	Fan assembly	.	89
What to do first	.	44	1080	CPU	.	93
Checkout guide	.	45	1090	SIM slot cover	.	94
Diagnostics using PC-Doctor for DOS . . .	. 45		1100 Wireless WAN slot cover and PCI Express Mini
Lenovo ThinkVantage Toolbox (Lenovo System			Card for wireless WAN		. 96
Toolbox)	.	48	1110 Palm rest assembly with cables		.	98
PC-Doctor for Rescue and Recovery . . . .	. 48		1120 PCI Express Mini Card for wireless LAN .		. 101
FRU tests	.	49	1130 Backup battery		.	103
Power system checkout	.	51	1140 Bluetooth daughter card (BDC-2) . . . .		.	104
Checking the ac adapter	. 51		1150 Media Card Reader slot board and Media
Checking operational charging	.	51	Card Reader cable assembly		.	105
Checking the battery pack	.	52	1160 Keyboard		.	107
Checking the backup battery	.	52	1170 Keyboard bezel		.	110
Related service information	55		1180 LCD unit		.	112
			1190 Top shielding assembly		.	117
Restoring the factory contents by using Recovery			1200	System board assembly	.	121
Disc Set	. 55		1210	USB connector board and USB cable assembly		129
Passwords	.	56	1220	DC-in cable and base cover	.	131
Power-on password	.	57	2010	LCD front bezel	.	136
Hard-disk password	.	57	2020	Speaker assembly	.	137
Supervisor password	.	57	2030	Integrated camera	.	138
How to remove the power-on password . . .	. 57		2040 Antenna assembly		. 139
How to remove the hard-disk password . . .	. 58		2050	Hinges, LCD panel, LCD cable, and LCD rear
Power management	.	60	cover assembly		.	141
Screen blank mode	.	60	Locations		145
Sleep (standby) mode	.	60
Hibernation mode	.	61	Front view		.	145
Symptom-to-FRU index	.	62	Rear view		.	146
Numeric error codes	.	62	Bottom view		.	146
Error messages	.	65

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