Lenovo G50 Manitenance Manual

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Important service information
Use	the	following	 strategy	to	prevent	 unnecessary	 expense	for	replacing	 and	servicing	FRUs:
•	If	you	 are	instructed	 to	replace	 an	FRU,	 but	the	replacement	 does	not	solve	the	problem,	reinstall	the	original	FRU	before	you	continue.
•	Some 	computers	 have	both 	a 	processor	 board	and	 a	system	 board.	If	you 	are	 instructed	 to	replace	 either	of	them,	 and	replacing	 one	of	them	 does	not	solve	the	problem,	reinstall	that	board,	and	then	replace	the	other	one.	
•	If	an	 adapter	 or	a	device	 consists	 of	more	 than	one	FRU,	 any	of	the	 FRUs	may	 be	the	 cause	 of	the	 error.	 Before	 replacing	 the	adapter	 or	device, 	remove	 the	FRUs	 one	by	one	 to	see	 if	the	 symptoms	 change.	Replace	 only	the	FRU	that	changed	the	symptoms.	
Attention:	The	 setup	 configuration	 on	the	 computer	 you	are	servicing	 may	have	 been	 customized.	 Running	Automatic	 Configuration	 may	alter	 the	settings.	 Note	the	current	 configuration	 settings	(using	the	View	 Configuration	option);	 then,	when	 service	 has	been	 completed,	 verify	that	those	 settings 	remain	in	effect.
Strategy for replacing a hard disk drive
Always	 try	to	run	 a	low-level	 format	before	 replacing	 a	hard	 disk	drive.	 This	will	cause	 all	customer 	data	 on	the	 hard	 disk	to	be	 lost. 	Make	 sure	that	the 	customer	has	a	current	backup	of	the	data	before	performing	this	action.
Attention:	The	 drive	 startup	 sequence 	in	 the	 computer	 you	are	servicing	 may	have	been	 changed.	 Be	extremely	 careful	during	write	operations	 such	as	copying, 	saving, 	or	 formatting. 	If 	you	 select 	an	 incorrect 	drive, 	data	 or	programs 	can	be	overwritten.
Important notice for replacing a system board 
Some	components	 mounted	on	a	system	 board	are	very	 sensitive.	 Improper	handling	 can	cause	 damage	 to	those	 components,	 and	may	 cause	 a	system 	malfunction.
Attention:		When	handling	a	system	board:
•	Do	not	drop	the	system	board	or	apply	any	excessive	force	to	it.
•	Avoid	rough	handling	of	any	kind.
•	Avoid	bending	 the	system	 board	and	hard	 pushing	 to	prevent	 cracking	 at	each	BGA 	(Ball	Grid	 Array)	chipset. 
						

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G50-70/G50-70m/Z50-70 Hardware Maintenance Manual
Important information about replacing RoHS compliant FRUs
RoHS, The Restriction of Hazardous Substances in Electrical and Electronic Equipment Directive (2002/95/EC) is a European Union legal requirement affecting the global electronics industry. RoHS requirements must be implemented on Lenovo products placed on the market after June 2006. Products on the market before June 2006 are not required to have RoHS compliant parts. If the original FRU parts are non-compliant, replacement parts can also be non-compliant. In all cases if the original FRU parts are RoHS compliant, the replacement part must also be RoHS compliant.
Note:	RoHS	 and	non-RoHS	 FRU	part	numbers	 with	the	same	 fit	and	 function	are	identified	with	unique	FRU	part	numbers.
Lenovo	 plans	to	transit	 to	RoHS	 compliance	 well	before	 the	implementation 	date	and	expects	 its	suppliers	 to	be	 ready	 to	support	 Lenovo’s	 requirements 	and	schedule	 in	the	 EU.	 Products	 sold	in	2005	 and	2006	 will	contain	 some	RoHS	 compliant	 FRUs.	The	following	 statement	 pertains	to	these	 products	 and	any	product	Lenovo	produces	containing	RoHS	compliant	FRUs.
RoHS	compliant	 FRUs	have	unique 	FRU	 part	numbers.	 Before	or	 after	 the	RoHS	 implementation	 date,	failed	 RoHS	 compliant	 parts	must	always	 be	replaced	 with	RoHS	 compliant	 ones,	so	only	 the	FRUs	 identified	 as	compliant	in	the	system	HMM	or	direct	substitutions	for	those	FRUs	may	be	used.	
Products marketed before June 2006Products marketed after June 2006 
Current or original part Replacement FRU Current or original part Replacement FRU
Non-RoHSCan	be	Non-RoHS
Must	be	RoHSMust	be	RoHSNon-RoHSCan	be	RoHS
Non-RoHSCan	sub	to	RoHS
RoHSMust	be	RoHS
Note:	A 	direct	 substitution	 is	a	part	 with	 a	different	 FRU	part	number	 that	is	automatically	shipped	by	the	distribution	center	at	the	time	of	the	order. 
						

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General checkout 
General checkout 
This	chapter	presents	the	following	information:
•	“What	to	do	first”	on	page	20
•	“Power	system	checkout”	on	page	21
Before	you	go	to	the	checkout,	make	sure	to	read	the	following	important	notes:
Important notes:
•	 Only	certified	trained	personnel	can	service	the	computer.
•	 Before	replacing	 any	FRU,	 read	the	entire	 page	on	removing	 and	replacing 	
FRUs.
•	 Carefully	remove	screws	for 	reuse	when	replacing	FRUs.
•	 Be 	extremely 	careful 	during 	such	 write	operations	 as	copying, 	saving, 	or 	
formatting.  Drives  in  the  computer  that  you  are  servicing  sequence  might 
have been altered. If you select an incorrect drive, data or programs might be 
overwritten.
•	 Replace 	an	 FRU	 only	with	 another 	FRU	 of	the 	correct	 model.  When  you 
replace an FRU, make sure that the machine model and the FRU part number are 
correct by referring to the FRU parts list. 
•	 An	 FRU	should	 not	be	replaced	 just	because	 of	a	single,	 unreproducible	 failure.	
Single failures can occur for a variety of reasons that have nothing to \
do with a 
hardware defect, such as cosmic radiation, electrostatic discharge, or software 
errors. Consider replacing an FRU only when a problem recurs. If you sus\
pect that 
an FRU is defective, clear the error logs and run the test again. If the error does 
not recur, do not replace the FRU. 
•	 Be	careful	not	to	replace	a	nondefective	FRU. 
						

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G50-70/G50-70m/Z50-70 Hardware Maintenance Manual
What to do first
When	you	do	return	 an	FRU,	 you	must	 include	 the	following	 information	 in	the	parts	exchange	form	or	parts	return	form	that	you	attach	to	it:
1.	 Name	and	phone	number	of	servicer
2.	 Date	of	service
3.	 Date	on	which	the	machine	failed
4.	 Date	of	purchase
5.	 Procedure	index 	and	page	number	in	which	the	failing	FRU	was	detected	
6.	 Failing	FRU	name	and	part	number
7.	 Machine	type,	model	number,	and	serial	number
8.	 Customer’s	name	and	address
Note for warranty:	During 	the	 warranty	 period,	the	customer	 may	be	responsible	 for	repair	 costs	if	the	 computer	 damage	was	caused	 by	misuse, 	accident,	 modification,	 unsuitable	physical	or	operating	 environment,	 or	improper	maintenance	by	the	customer.
The	 following	 is	a	list	 of	some	 common	 items	that	are	not	covered	 under	warranty	 and	some	 symptoms	 that	might	 indicate	 that	the	system	 was	subjected	to	stress	beyond	normal	use.
Before	 checking	 problems	 with	the	computer,	 determine	 whether	the	damage 	is	covered	under	the	warranty	by	referring	to	the	following	list:
The following are not covered under warranty: 
•	LCD	 panel	 cracked	 from	the	application	 of	excessive	 force	or	from	 being 	dropped
•	Scratched	(cosmetic)	parts
•	Distortion,	deformation,	or	discoloration	of	the	cosmetic	parts
•	Plastic	 parts,	latches,	 pins,	or	connectors	 that	have	 been	 cracked	 or	broken	by	excessive	force
•	Damage	caused	by	liquid	spilled	into	the	system
•	Damage	 caused	by	the	 improper	 insertion	of	a	PC	 Card	 or	the	 installation	 of	an	incompatible	card
•	Improper	disk	insertion	or	use	of	an	optical	drive	
•	Diskette	drive	damage	 caused	by	pressure	 on	the	 diskette	 drive	cover, 	foreign	material	in	the	drive,	or	the	insertion	of	a	diskette	with	multiple	labels	
•	Damaged	or	bent	diskette	eject	button
•	Fuses	blown	by	attachment	of	a	nonsupported	device
•	Forgotten	computer	password	(making	the	computer	unusable)
•	Sticky	keys	caused	by	spilling	a	liquid	onto	the	keyboard
•	Use	of	an	incorrect	 AC	adapter	on	laptop	products
The following symptoms might indicate damage caused by nonwarranted activities: 
•	Missing	parts	might	be	a	symptom	of	unauthorized	service	or	modification.	
•	If	the	 spindle	 of	a	hard	 disk	drive	 becomes	 noisy,	it	may	 have	 been	 subjected	to	excessive	force,	or	dropped. 
						

							21
General checkout 
Power system checkout
To	verify	a	symptom,	follow	the	steps	below:
1.	 Turn	off	the	computer.
2.	 Remove	the	battery	pack.
3.	 Connect	the	AC	adapter.
4.	 Make	sure	that	power	is	supplied	when	you	turn	on	the	computer.
5.	 Turn	off	the	computer.
6.	 Disconnect	the	 AC	adapter	and	install	the	charged	battery	pack.
7.	 Make	sure	that	the	battery	 pack	supplies	 power	when	you	turn	 on	the	computer.
If	you	suspect	a	power	problem,	see	the	appropriate	one	of	the	following	power	supply	checkouts:
•	“Checking	the	 AC	adapter”	on	page	21
•	“Checking	operational	charging”	on	page	21
•	“Checking	the	battery	pack”	on	page	22
Checking the AC adapter 
You	are	here	because	the	computer	fails	only	when	the	 AC	adapter	is	used.	
•	If	the	 power-on	 indicator	does	not	turn	 on,	check	 the	power	 cord	of	the	 AC	adapter	for	correct	continuity	and	installation.
•	If	the	 computer	 does	not	charge	 during	operation,	 go	to	“Checking 	operational	charging”.
To	check	the	 AC	adapter,	follow	the	steps	below:
1.	 Unplug	the	AC	adapter	cable	from	the	computer.
2.	 Measure	 the	output 	voltage	 at	the	 plug	 of	the	 AC	 adapter 	cable. 	See	 the	following	figure:
1
2
9 ROWDJH9&

3LQ


Note:	Output	 voltage	 for	the	 AC	 adapter	 pin	No.	 2	may	 differ	 from	the	one	 you	are	servicing.
3.	 If	the	voltage	is	not	correct,	replace	the	 AC	adapter.
4.	 If	the	voltage	is	acceptable,	do	the	following:	
•	Replace	the	system	board.
•	If	the	problem	persists,	go	to	“Lenovo	G50-70/G50-70m/Z50-70”	on	page	26.
Note:	Noise	from	the	AC	adapter	does	not	always	indicate	a	defect.
Checking operational charging
To	check 	whether 	the	 battery 	charges 	properly 	during	 operation, 	use	 a	discharged	 battery	pack	or	a	battery	 pack	that	has	less	 than	 50%	 of	the	 total	power	remaining	when	installed	in	the	computer.	 
						

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G50-70/G50-70m/Z50-70 Hardware Maintenance Manual
Perform	operational	 charging.	If 	the	 battery	 status	indicator	 or	icon	 does	 not	light 	on, 	remove	 the	battery	 pack	and	let	it 	return	 to	room	 temperature. 	Reinstall	the	 battery	 pack.	If 	the	 charge	 indicator 	or 	icon	 is	still	 off,	replace	 the	battery 	pack.
If	the	 charge	 indicator	 still	does	 not	light	 on,	replace	 the	system	 board.	Then	reinstall	the	battery	pack.	If	it	is	still	not	charged,	go	to	the	next	section.
Checking the battery pack
Battery	 charging	 does	not	start	 until	the	Power	 Meter	shows	 that	less	 than	 95%	of	the	 total	 power	 remains;	 under	this	condition	 the	battery	 pack	can	charge	 to	100%	of	its	 capacity.	 This	protects	 the	battery	 pack	from	being	 overcharged	 or	from	having	a	shortened	life.
To	check	your	battery,	move	your	cursor	to	the	Power	Meter	icon	in	the	icon	tray 	of	the	 Windows® 	taskbar	 and	wait	for	 a	moment 	(but 	do	 not	click	 it),	and	 the	percentage	 of	battery	 power	remaining 	is	 displayed.	 To	get	 detailed	 information	about	the	battery,	double-click	the	Power	Meter	icon.
Note:	If	 the	 battery	 pack	becomes	 hot,	it	may	 not	be	 able	 to	be	 charged. 	Remove	it	from	 the	computer	 and	leave 	it	 at	 room	 temperature	 for	a	while.	 After	it	cools	down,	reinstall	and	recharge	it. 
						

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Related service information
Related service information
This	chapter	presents	the	following	information:
•	“Restoring	the	factory	contents	by	using	OneKey	Recovery”	on	page	23
•	“Passwords”	on	page	24
•	“Power	management”	on	page	25
Restoring the factory contents by using OneKey Recovery
Restore of factory default
The	Lenovo 	G50-70/G50-70m/Z50-70 	computers	 come	with 	pre-installed 	OneKey	Recovery	 System.	In	order	 to	save	 application	 files	and	the	initial 	backed	 up	files	 of	the	 system,	 the	hard	 disk	in	a	Lenovo	 computer	 includes	a	hidden	 partition	 when	it	is	 shipped.	 If	you	 need	 to	restore	 the	system	 to	the	point	 of	your	 first	boot	 up,	just	 enter	 Lenovo	 OneKey	 Recovery	 System	and	run	System Recovery.	For	details	of	OneKey	Recovery	System,	see	the User Guide for Lenovo OneKey Recovery system.
Note:   This  will  delete  all  the  new  data  on  the  system  partition  (C  drive),  which 
is not recoverable. Make sure to back up your critical data before you perform this  action.
When	 you	use	the	recovery	discs	to	 boot	 your	computer,	 the	system	 will	enter	the	 user	 interface	 for	system	 recovery	 automatically.	 Please	follow	the	prompt	to	insert	the	backup	discs	to	complete	the	whole	recovery	process.	
Note:	The recovery process might take up to 2 hours.  
						

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G50-70/G50-70m/Z50-70 Hardware Maintenance Manual
Passwords
As	many	 as	three	 passwords	 may	be	needed 	for	 any	 Lenovo	 computer: 	the	power-on	 password	 (POP),	the	hard	 disk	password	 (HDP),	and	the	administrator	password.
If	any	 of	these	 passwords	 has	been	 set,	a	prompt	 for	it	appears	 on	the	 screen	whenever	 the	computer	 is	turned	 on.	The	 computer	 does	not	start 	until	 the	password	is	entered.
Power-on password
A	power-on	 password	 (POP)	protects	 the	system	 from	being	 powered	 on	by	an 	unauthorized 	person.	 The	password 	must	 be	entered 	before 	an 	operating 	system	can	be	booted.
Hard-disk password
There	are	two	hard-disk	passwords	(HDPs):
+	User	HDP 	-	for	the	user
+	Master	 HDP	-	 for	 the	 system	 administrator,	 who	can	use	it	to	 get	 access	 to	the	hard	disk	drive	even	if	the	user	has	changed	the	user	HDP
Attention:	 If	the	 user	 HDP	has	 been	 forgotten,	 check	whether	 a	master	 HDP	has	been	 set.	If	it	has,	 it	can	 be	used	 for	access	 to	the	 hard	 disk	drive.	 If	no	 master	 HDP	is	 available,	 neither	Lenovo	 nor	Lenov	 authorized	 service	technicians	 provide	any	services	 to	reset	 either	 the	user	 or	the	 master	 HDP,	or	to	recover 	data	 from	the	 hard	 disk	drive. 	The	 hard	 disk	drive	 can	be	replaced 	for	a	scheduled	fee.
Administrator password
Administrator	 password	controls	the	access	 of	the	 whole	 setup	utility.	 Only	Administrator	password	was	set	then	User	password	can	be	set.	If	 Administrator	password	was	cleared,	the	User	password	was	cleared	too. 
						

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Related service information
Power management
Note:	Power 	management 	modes 	are	 not	supported	 for	APM	 operating	 system.
To	reduce	 power	consumption,	 the	computer	 has	three	 power	 management 	modes:	screen	blank,	sleep	(standby),	and	hibernation.
Screen blank state
If	the	 time	 set	on	the	 “Turn	 off	monitor”	 timer	in	the	 operating	 system	expires,	the	LCD	 backlight	 turns	off.	You	 can	also	 turn	off	the	 LCD	 backlight	 by		pressing	.
To	end	screen	blank	state	and	resume	normal	operation,	press	.
Putting the computer to sleep or shutting it down
When	 you	have	 finished	 working	with	your	 computer,	 you	can	put	it	to	 sleep	 or	shut	it	down.
Putting your computer to sleep
If	you	will	be	away	from	your	computer	for	only	a	short	time,	put	the	computer	to 	sleep.	When	the	computer	 is	in	 sleep	 mode,	 you	can	quickly	 wake	it	to	 resume	use,	 bypassing	 the	startup	 process.	 To	put	 the	computer	 to	sleep,	 do	one	 of	the	following:
•	Close	the	display	panel.
•	Press	the	power	button.
•	Open	the	Charms	and	then	select	Settings 	→ Power 	→ Sleep.
Attention:	Wait 	until	 the	power 	indicator 	light 	starts 	blinking	 (indicating	 that	the	 computer 	is 	in	 sleep	 mode) 	before	 you	move	 your	computer. 	Moving	 your	computer	 while	the	hard	 disk	is	spinning	 can	damage	 the	hard	 disk,	 causing 	loss	of	data.
To	wake	the	computer,	do	one	of	the	following:
•	Press	any	key	on	the	keyboard.
•	Press	the	power	button.
Shutting down the computer
If	you	 are	not	going 	to	 use	 your	 computer	 for	a	long	 time,	 shut	it	down.	 To	shut	down	your	computer:
•	Open	the	charms	bar,	then	select	Settings 	→ Power 	→ Shut down.
•	Right-click	 the	Start	button	 in	the	 lower-left	 corner	and	select	Shut down or sign out	→	Shut down. 
						

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G50-70/G50-70m/Z50-70 Hardware Maintenance Manual
Lenovo G50-70/G50-70m/Z50-70
This	chapter	 presents	 the	following 	product-specific	 service	references	 and	product-specific	parts	information:
•	“Specifications”	on	page	26
•	“Status	indicators”	on	page	28
•	“Hotkeys”	on	page	29
•	“FRU	replacement	notices”	on	page	30
•	“Removing	and	replacing	an	FRU”	on	page	31
•	“Locations”	on	page	67
•	“Parts	list”	on	page	69
Specifications
The	 following	 table	lists	the	specifications	 of	the	 Lenovo	 G50-70/G50-70m/Z50-70:	
Table 1. Specifications
FeatureDescription
Processor•	 See	the	system	 properties	 of	your	 computer,	 you	can	do	this	 as	follows:	 Open	 the	Control Panel,	and	 then	 select	System and Security	→	System.Bus	architecture•	 1,600	MHz	DDR3	SDRAM	(PC3-12800S)	PCI	Express	bus	DMIGraphic	memory 	chip	•	 Integrated/AMD	Jel	LE
Display•	 15.6"	16:9,	1,366	×	768	pixelsStandard	memory•	 DDR3L-1,600	MHz	SODIMM	×	2	(max	16	GB)
CMOS	RAM•	 256	BytesHard	disk	drive	•	 2.5-inch,	7	mm	/	9.5	mm	SATA•	 320	GB	/	500	GB	/	1TB	5,400	rpmOptical	drive	•	 Internal	9.0	mm	(Rambo)I/O	port	•	 Combo	audio	jack	×	1	•	 RJ45	×	1•	 HDMI	port	×	1•	 USB	2.0	port	×	2,	USB	3.0	port	×	1•	 2	in	1	slot	×	1	(SD/MMC)Audio•	 1/8"	Combo	audio	jack•	 1.5	W	speakers	×	2•	 Array	MicrophoneEthernet	(on	the	system	board)	•	 10/100/1,000	Mbps
Bluetooth	wireless	•	 Combined	in	combo	card