Lenovo G50 User Guide

17
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....

18
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...

19
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...

20
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....

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...

22
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...

23
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...

24
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...

25
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...

26
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...