Lenovo G40 Manual

Downloaded from www.Manualslib.com manuals search engine Lenovo G40-30/G40-45/
G40-70/G40-70m/ 
Z40-70/Z40-75
Hardware 
Maintenance 
Manual  

Downloaded from www.Manualslib.com manuals search engine Notes:
•	 Before	using	this 	information 	and 	the 	product 	it 	supports, 	be 	sure 	to 	read 	the 	general 	information 	under 	“Notices”	on	page	86.
•	 This	manual 	 applies	 to 	 the 	 following 	 models: 	 Lenovo 	 G40-30/G40-45/G40-70/G40-70m/Z40-70/Z40-75.		The	illustrations	used	in	this	manual	are	for	Lenovo	G40-70	unless	otherwise	stated.
First Edition (Apr. 2014)
© Copyright Lenovo 2014. All rights reserved.
LIMITED AND RESTRICTED RIGHTS...

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Contents
About this manual .......................................iv
Safety information
 ........................................1
General safety ................................................2
Electrical safety ..............................................3
Safety inspection guide ..................................5
Handling devices that are sensitive to 
electrostatic discharge
 ....................................6
Grounding requirements...

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About this manual
This manual contains service and reference information for the following\
 
Lenovo product:Lenovo G40-30/G40-45/G40-70/G40-70m/Z40-70/Z40-75
Use this manual to troubleshoot problems.
The manual is divided into the following sections:
• The common sections provide general information, guidelines, and safety 
information required for servicing computers.
• The product-specific section includes service, reference, and...

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Safety information
Safety information
This chapter presents the following safety information that you need to get 
familiar with before you service a Lenovo G40-30/G40-45/G40-70/G40-70m/
Z40-70/Z40-75 computer:
• “General safety” on page 2
• “Electrical safety” on page 3
• “Safety inspection guide” on page 5
• “Handling devices that are sensitive to electrostatic discharge” o\
n page 6
• “Grounding requirements” on page 6
• “Safety notices:...

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G40-30/G40-45/G40-70/G40-70m/Z40-70/Z40-75 Hardware Maintenance Manual
General safety
Follow these rules below to ensure general safety:
• Observe a good housekeeping in the area where the machines are put 
during and after the maintenance.
• When lifting any heavy object: 
1. Make sure that you can stand safely without slipping.
2. Distribute the weight of the object equally between your feet.
3. Use a slow lifting force. Never move suddenly or...

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Safety information
Electrical safety
Observe the following rules when working on electrical equipments.
Important:
Use	only	approved 	tools 	and 	test 	equipments. 	Some 	hand 	tools 	have 	handles	covered
	with 	a 	soft 	material 	that 	does 	not 	insulate 	you 	when 	working 	with 	live	electrical

	 currents.
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G40-30/G40-45/G40-70/G40-70m/Z40-70/Z40-75 Hardware Maintenance Manual
• Always look carefully for possible hazards in your work area. Examples of 
these hazards are moist floors, nongrounded power extension cables, power 
surges, and missing safety grounds. 
• Do not touch live electrical circuits with the reflective surface of a plastic 
dental mirror. The surface is conductive; such touching can cause personal 
injury and machine damage.
• Do...

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Safety information
Safety inspection guide
The purpose of this inspection guide is to assist you in identifying pot\
ential 
unsafe conditions. As each machine was designed and built, required safety 
items were installed to protect users and service personnel from injury. This 
guide addresses only those items. You should use good judgment to identify 
potential safety hazards according to the attachment of non-Lenovo features or 
options not...

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G40-30/G40-45/G40-70/G40-70m/Z40-70/Z40-75 Hardware Maintenance Manual
Handling devices that are sensitive to electrostatic discharge
Any computer part containing transistors or integrated circuits (ICs) should be 
considered sensitive to electrostatic discharge (ESD). ESD damage can occur 
when there is a difference in charge between objects. Protect against ESD 
damage by equalizing the charge so that the machine, the part, the work mat, 
and...