Lenovo G50 User Guide

7
Safety information
Safety notices: multilingual translations
The	safety	 notices	 in	this	 section	 are	provided	 in	English,	 French,	German, 	Hebrew,	Italian,	Japanese,	and	Spanish.	
Safety notice 1 
Before the computer is powered on after FRU replacement, make sure all screws, 
springs, and other small parts are in place and are not left loose insid\
e the 
computer. Verify this by shaking the computer and listening for rattling sounds. 
Metallic parts or metal flakes can cause electrical shorts....

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G50-70/G50-70m/Z50-70 Hardware Maintenance Manual
Safety notice 2 
 DANGER
Some  standby  batteries  contain  a  small  amount  of  nickel  and  cadmium.  Do  not 
disassemble a standby battery, recharge it, throw it into fire or water, or short-
circuit  it.  Dispose  of  the  battery  as  required  by  local  ordinances  or  regulations. 
Use only the battery in the appropriate parts listing. Use of an incorrect battery can 
result in ignition or explosion of the battery.
Certaines batteries de...

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Safety information
Safety notice 3
 DANGER
The  battery  pack  contains  small  amounts  of  nickel.  Do  not  disassemble  it,  throw 
it  into  fire  or  water,  or  short-circuit  it.  Dispose  of  the  battery  pack  as  required  by 
local ordinances or regulations. Use only the battery in the appropriate parts listing 
when replacing the battery pack. Use of an incorrect battery can result in ignition 
or explosion of the battery. 
La batterie contient du nickel. Ne la démontez pas, ne l’exposez...

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G50-70/G50-70m/Z50-70 Hardware Maintenance Manual
Safety notice 4
 DANGER
The  lithium  battery  can  cause  a  fire,  an  explosion,  or  a  severe  burn.  Do  not 
recharge  it,  remove  its  polarized  connector,  disassemble  it,  heat  it  above  100°C 
(212°F), incinerate it, or expose its cell contents to water. Dispose of the battery as 
required by local ordinances or regulations. Use only the battery in the appropriate 
parts  listing.  Use  of  an  incorrect  battery  can  result  in...

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Safety information
Safety notice 5
If the LCD breaks and the fluid from inside the LCD gets into your eyes or on your 
hands, immediately wash the affected areas with water at least for 15 minutes. 
Seek medical care if any symptoms caused by the fluid are present after washing.
Si le panneau d’affichage à cristaux liquides se brise et que vous recevez dans les 
yeux  ou  sur  les  mains  une  partie  du  fluide,  rincez-les  abondamment  pendant  au 
moins quinze minutes. Consultez un médecin si des...

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G50-70/G50-70m/Z50-70 Hardware Maintenance Manual
Safety notice 6
 DANGER
To avoid shock, do not remove the plastic cover that protects the lower p\
art of the 
inverter card.
Afin  d’éviter  tout  risque  de  choc  électrique,  ne  retirez  pas  le  cache  en  plastique 
protégeant la partie inférieure de la carte d’alimentation.
Aus  Sicherheitsgründen  die  Kunststoffabdeckung,  die  den  unteren  Teil  der 
Spannungswandlerplatine umgibt, nicht entfernen.
Per evitare scosse elettriche, non...

13
Safety information
Safety notice 8
 DANGER
Before removing any FRU, turn off the computer, unplug all power cords from 
electrical outlets, remove the battery pack, and then disconnect any int\
erconnecting 
cables.
Avant de retirer une unité remplaçable en clientèle, mettez le système hors tension, 
débranchez  tous  les  cordons  d’alimentation  des  socles  de  prise  de  courant,  retirez 
la batterie et déconnectez tous les cordons d’interface.
Die  Stromzufuhr  muß  abgeschaltet,  alle...

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G50-70/G50-70m/Z50-70 Hardware Maintenance Manual
Laser compliance statement
Some	models	 of	Lenovo	 computer	 are	equipped	 from	the	factory	 with	an	optical 	storage 	device	 such	as	a	CD-ROM	 drive	or	 a	DVD-ROM	 drive.	Such	devices	 are	also	 sold	separately	 as	options.	 If	one	 of	these	 drives	 is	installed,	it	is	 certified	 in	the	 U.S. 	to	 conform 	to	 the	 requirements	 of	the	 Department 	of 	Health	 and	Human	 Services	 21	Code	 of	Federal	 Regulations	 (DHHS	21	CFR)	Subchapter	 J	for...

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Safety information
A	CD-ROM	 drive,	a	DVD-ROM	 drive,	or	any	 other	 storage	 device	installed	 may	contain	an	embedded	Class	3A 	or	Class	3B	laser	diode.	Note	the	following:
 DANGER
Emits visible and  invisible laser  radiation when  open.  Do  not  stare  into  the  beam, 
do  not  view  directly  with  optical  instruments,  and  avoid  direct  exposure  to  the 
beam.
Radiação  por  raio  laser  ao  abrir.  Não  olhe  fixo  no  feixe  de  luz,  não  olhe 
diretamente  por  meio  de  instrumentos...

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G50-70/G50-70m/Z50-70 Hardware Maintenance Manual
Important service information
This	chapter	presents	the	following	important	service	information:	
•	“Strategy	for	replacing	FRUs”	on	page	16
–	“Strategy	for	replacing	a	hard	disk	drive”	on	page	17
–	“Important	notice	for	replacing	a	system	board”	on	page	17
•	“Important	information	about	replacing	RoHS	compliant	FRUs”	on	page	18
Important:
BIOS and device driver fixes are customer-installable. The BIOS and device drivers 
are posted on the customer...