Lenovo B5400 Service Manual

Lenovo B5400/M5400/
M5400 Touch
Hardware 
Maintenance 
Manual 

Notes:
•	Before	using	this	information	and	the	product	it	supports,	be	sure	to	read	the	general	information	under	“Notices”	on	page	92.
•	This	manual	applies	to	the	following	models:	Lenovo	B5400/M5400/M5400	Touch.	The	illustrations	used	in	this	manual	are	for	Lenovo	M5400	unless	otherwise	stated.
First Edition (Jul. 2013)
© Copyright Lenovo 2013. All rights reserved.
LIMITED AND RESTRICTED RIGHTS NOTICE: If data or software is delivered pursuant a General Services Administration “GSA” contract, use,...

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

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About this manual
This manual contains service and reference information for the following\
 Lenovo product:
Lenovo B5400/M5400/M5400 Touch
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 product-specific parts information.
Important:
This	manual	 is	intended	 only	for	trained...

1
Safety information
Safety information
This chapter presents the following safety information that you need to get familiar with before you service a Lenovo B5400/M5400/M5400 Touch 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: multilingual translations” on page 7
• “Laser compliance statement” on page 14 

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Lenovo B5400/M5400/M5400 Touch 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 twist when you attempt to lift it.
4. Lift it by standing or pushing...

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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.
Many	 customers	 have	rubber	 floor	mats	near	their	 machines	 that	contain	 small	
conductive	 fibers	to	decrease	 electrostatic	 discharges.	Do	not	 use	 such	 kind	of	mat 	
to	protect	yourself	from...

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Lenovo B5400/M5400/M5400 Touch 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 not service the following parts with the power on when they are removed...

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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 covered by this inspection guide.
If any unsafe conditions are...

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Lenovo B5400/M5400/M5400 Touch 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 the person handling the part are all at the same charge. 
Notes:
1.	 Use...