Lenovo Edge 2 User Guide

							Lenovo Edge 2 15
Hardware 
Maintenance 
Manual 
						

							Notes:
•	Before	using	this	information	and	the	product	it	supports,	be	sure	to	read	the	general	information	under	
“Notices”	on	page	66.
First Edition (September. 2015)
© Copyright Lenovo 2015. All rights reserved.
LIMITED AND RESTRICTED RIGHTS NOTICE: If data or software is delivered pursuant a General 
Services Administration “GSA” contract, use, reproduction, or disclosure is subject to restrictions set 
forth in Contract No. GS-35F-05925.
© 2015 Lenovo 
						

							iii
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  .................................6
Safety notices: multilingual translations ..........7
Laser compliance statement .........................14
Important service information ................... 16
Strategy for replacing FRUs  .........................16
Strategy for replacing a hard disk drive  ............17
Important notice for replacing a system   
board  ................................................................ 17
Important information about replacing RoHS 
compliant FRUs ............................................ 18
General checkout  ...................................... 19
What to do first ............................................. 20
Power system checkout ................................21
Checking the AC adapter  ................................. 21
Checking operational charging  .........................21
Related service information ...................... 23
 Restoring the factory contents by using OneKey 
Recovery  ...................................................... 23
Restore of factory default ................................. 23Passwords .................................................... 24Power-on password .......................................... 24
Hard-disk password  .......................................... 24
Supervisor password  ........................................ 24
Power management ..................................... 25Screen blank state ............................................ 25
Putting the computer to sleep or   
shutting it down  ................................................. 25
Putting your computer to sleep  .........................25
Shutting down the computer  ............................. 26
Lenovo Edge 2 15  ....................................... 27
Specifications  ............................................... 27
Status indicators  ........................................... 29
Fn key combinations ..................................... 30
FRU replacement notices  .............................31
Screw notices  .................................................. 31Removing and replacing an FRU .................321010 Base cover  ............................................... 33
1020 Battery pack ............................................. 35
1030 Hard disk drive   ........................................ 36
1040 PCI Express Mini Card for wireless   
LAN  .................................................................. 38
1050 DIMM  ....................................................... 401060 Fan assembly and heat sink assembly
 .... 41
1070 LCD unit  ................................................... 42
1080 System board  .......................................... 44
1090 Speakers  ................................................. 46
1100 Power assembly, touch pad module and IO 
board ................................................................. 47
1110 LCD front cover ........................................ 49
1120 Mic board, LCD cover, and hinges  ...........51
1130 LCD module  ............................................. 53
Locations ...................................................... 55Front view and right-side view ..........................55
Bottom and Left-side view   ...............................56
Parts list ........................................................ 57Overall .............................................................. 58
LCD FRUs ........................................................ 61
Miscellaneous parts  .......................................... 63
Screw ................................................................ 63
AC adapters  ...................................................... 64
Power cords  ...................................................... 65
Notices......................................................... 66
Trademarks  .................................................. 67 
						

							iv
About this manual
This manual contains service and reference information for the following\
 
Lenovo product:Lenovo Edge 2 15
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	 servicers	 who	are 	familiar 	with 	Lenovo 	
products.	Use	this	manual	to	troubleshoot	problems	effectively.
Before 	servicing	 a	Lenovo 	product,	 make	sure 	to 	read 	all 	the 	information 	under 	
“Safety	information”	on	page	1	and	“Important	service	information”	on	page	16.	 
						

							1
Safety information
Safety information
This chapter presents the following safety information that you need to get 
familiar with before you service a Lenovo Edge 2 15 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 
						

							2
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 up with your leg muscles; this action could 
avoid the strain from the muscles in your back. Do not attempt to lift a\
ny 
object that weighs more than 16 kg (35 lb) or that you think is too heavy 
for you.
•  Do not perform any action that causes hazards to the customer, or that 
makes the machine unsafe.
•  Before you start the machine, make sure that other service representatives 
and the customer are not in a hazardous position.
•  Please remove covers and other parts in a safe place, away from all 
personnel, while you are servicing the machine.
•  Keep your toolcase away from walk areas so that other people will not trip 
over it.
•  Do not wear loose clothing that can be trapped in the moving parts of the 
machine. Make sure that your sleeves are fastened or rolled up above your 
elbows. If your hair is long, fasten it.
•  Insert the ends of your necktie or scarf inside clothing or fasten it with the 
nonconductive clip, about 8 centimeters (3 inches) from the end.
•  Do not wear jewelry, chains, metal-frame eyeglasses, or metal fasteners for 
your clothing.
Attention:  Metal objects are good electrical conductors.
•  Wear safety glasses when you are hammering, drilling, soldering, cutting 
wire, attaching springs, using solvents, or working in any other conditions 
that may be hazardous to your eyes.
•  After service, reinstall all safety shields, guards, labels, and ground \
wires. 
Replace any safety device that is worn or defective.
•  Reinstall all covers correctly before returning the machine to the custo\
mer.
•  Fan louvers on the machine help to prevent the overheating of internal 
components. Do not obstruct fan louvers or cover them with labels or 
stickers.
Lenovo Edge 2 15 Hardware Maintenance Manual  
						

							3
About this manual
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	electrical	shock.	
•  Find the room emergency power-off (EPO) switch, disconnecting switch or 
electrical outlet. If an electrical accident occurs, you can then operat\
e the 
switch or unplug the power cord quickly. 
•  Do not work alone under hazardous conditions or near the equipment that 
has hazardous voltages.
•  Disconnect all power before:
–  Performing a mechanical inspection
–  Working near power supplies
–  Removing or installing main units
•  Before you start to work on the machine, unplug the power cord. If you 
cannot unplug it, ask the customer to power-off the wall box that supplies 
power to the machine, and to lock the wall box in the off position.
•  If you need to work on a machine that has exposed electrical circuits, 
observe the following precautions:
–  Ensure that another person, familiar with the power-off controls, is near 
you.
  Attention:  Another person must be there to switch off the power, if 
necessary. 
–  Use only one hand when working with powered-on electrical equipment; 
keep the other hand in your pocket or behind your back. 
  Attention:  An electrical shock can occur only when there is a complete 
circuit. By observing the above rule, you may prevent a current from 
passing through your body. 
–   When using testers, set the controls correctly and use the approved 
probe leads and accessories for that tester.
–  Stand on suitable rubber mats (obtained locally, if necessary) to insulate 
you from grounds such as metal floor strips and machine frames.
Observe the special safety precautions when you work with very high voltages; 
instructions for these precautions are in the safety sections of maintenance 
information. Be extremely careful when you measure the  high voltages.
•  Regularly inspect and maintain your electrical hand tools for safe operational 
condition. 
•  Do not use worn or broken tools and testers.
•  Never assume that power has been disconnected from a circuit. First, check 
it to make sure that it has been powered off.  
						

							4
• 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 
from their normal operating places in a machine: 
–  Power supply units
– Pumps
–  Blowers and fans
–  Motor generators
and similar units. (This practice ensures correct grounding of the unit\
s.)
•  If an electrical accident occurs:
–  Caution: do not become a victim yourself.
–  Switch off the power.
–  Send the victim to get medical aid.
Lenovo Edge 2 15 Hardware Maintenance Manual  
						

							5
About this manual
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 present, you must determine how serious the 
apparent hazard could be and whether you can continue without first correcting 
the problem. 
Consider these conditions and the safety hazards they present: 
• Electrical hazards, especially primary power (primary voltage on the frame 
can cause serious or fatal electrical shock) 
•  Explosive hazards, such as a damaged CRT face or a bulging capacitor
•  Mechanical hazards, such as loose or missing hardware
To determine whether there are any potential unsafe conditions, use the 
following checklist at the beginning of every service task. Begin the checks with 
the power off, and the power cord disconnected.
Checklist:
1.  Check exterior covers for damage (loose, broken, or sharp edges).
2.  Turn off the computer. Disconnect the power cord.
3.  Check the power cord for:
a. A third-wire ground connector in good condition. Use a meter to measure 
third-wire ground continuity for 0.1 ohm or less between the external 
ground pin and the frame ground.
b.  The power cord should be the type specified in the parts list.
c.  Insulation must not be frayed or worn.
4.  Check for cracked or bulging batteries.
5.  Remove the cover.
6.  Check for any obvious non-Lenovo alterations. Use good judgment as to th\
e 
safety of any non-Lenovo alterations.
7.  Check inside the unit for any obvious unsafe conditions, such as metal 
filings, contamination, water or other liquids, or signs of fire or smoke 
damage.
8.  Check for worn, frayed, or pinched cables.
9.  Check that the power-supply cover fasteners (screws or rivets) have no\
t 
been removed or tampered with. 
						

							6
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	product-specific	 ESD	procedures	 when	they	exceed	 the	requirements 	
noted	here.	
2.	 Make 	sure 	that 	the 	ESD	 protective 	devices	 you	use	have 	been	 certified	 (ISO	
9000)	as	fully	effective.
When handling ESD-sensitive parts:
•  Keep the parts in protective packages until they are inserted into the p\
roduct. 
•  Avoid contact with other people.
•  Wear a grounded wrist strap against your skin to eliminate static on your 
body.
•  Prevent the part from touching your clothing. Most clothing is insulative and 
retains a charge even when you are wearing a wrist strap.
•  Use the black side of a grounded work mat to provide a static-free work 
surface. The mat is especially useful when handling ESD-sensitive devices.
•  Select a grounding system, such as those listed below, to provide protection 
that meets the specific service requirement.
Note:
The	 use	of	a	grounding	 system	to	guard	 against	 ESD	damage	 is	desirable	 but	not	
necessary.	
–  Attach the ESD ground clip to any frame ground, ground braid, or green-
wire ground.
–  When working on a double-insulated or battery-operated system, use an 
ESD common ground or reference point. You can use coax or connector-
outside shells on these systems.
–  Use the round ground prong of the ac plug on ac-operated computers.
Grounding requirements
Electrical grounding of the computer is required for operator safety and correct 
system  function.  Proper  grounding  of  the  electrical  outlet  can  be  verified  by  a 
certified electrician. 
Lenovo Edge 2 15 Hardware Maintenance Manual