Lenovo G40 Manual

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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.\
 
• If an adapter or a device consists of more than one FRU, any of the FRUs 
may be the cause of the error. Before replacing the adapter or device, 
remove the FRUs one by one to see if the symptoms change. Replace only 
the FRU that changed the symptoms. 
Attention:  The setup configuration on the computer you are servicing may 
have been customized. Running Automatic Configuration may alter the 
settings.  Note  the  current  configuration  settings  (using  the  View  Configuration 
option); then, when service has been completed, verify that those setti\
ngs 
remain in effect.
Strategy for replacing a hard disk drive
Always try to run a low-level format before replacing a hard disk drive.\
 This 
will cause all customer data on the hard disk to be lost. Make sure that the 
customer has a current backup of the data before performing this action.\
Attention:  The drive startup sequence in the computer you are servicing may 
have been changed. Be extremely careful during write operations such as 
copying, saving, or formatting. If you select an incorrect drive, data or programs 
can be overwritten.
Important notice for replacing a system board 
Some components mounted on a system board are very sensitive. Improper 
handling can cause damage to those components, and may cause a system 
malfunction.
Attention:   When handling a system board:
• Do not drop the system board or apply any excessive force to it.
• Avoid rough handling of any kind.
• Avoid bending the system board and hard pushing to prevent cracking at 
each BGA (Ball Grid Array) chipset.  
						

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G40-30/G40-45/G40-70/G40-70m/Z40-70/Z40-75 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 are non-compliant, 
replacement parts can also be non-compliant. In all cases if the original 
FRU parts are RoHS compliant, the replacement part must also be RoHS 
compliant.
Note:  RoHS  and  non-RoHS  FRU  part  numbers  with  the  same  fit  and  function 
are identified with unique FRU part numbers.
Lenovo plans to transit to RoHS compliance well before the implementation 
date and expects its suppliers to be ready to support Lenovo’s requirements 
and schedule in the EU. Products sold in 2005 and 2006 will contain some 
RoHS compliant FRUs. The following statement pertains to these products and 
any product Lenovo produces containing RoHS compliant FRUs.
RoHS compliant FRUs have unique FRU part numbers. Before or after the 
RoHS implementation date, failed RoHS compliant parts must always be 
replaced  with  RoHS  compliant  ones,  so  only  the  FRUs  identified  as  compliant 
in the system HMM or direct substitutions for those FRUs may be used. 
Products marketed before June 2006 Products marketed after June 2006 
Current or 
original part  Replacement FRU 
Current or 
original part Replacement FRU
Non-RoHS Can be Non-RoHS
Must be RoHSMust be RoHS
Non-RoHS
Can be RoHS
Non-RoHS Can sub to RoHS
RoHS Must be RoHS
Note: A direct substitution is a part with a different FRU part number that is 
automatically shipped by the distribution center at the time of the orde\
r.  
						

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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 	
r
 eplacing 	
any
 	
FRU,
 	
r
 ead 	
the
 	
entir
 e 	
page
 	
on
 	
r
 emoving 	
and
 	
r
 eplacing
	FRUs.
•	

Carefully 	 remove 	 screws 	 for
	
 reuse 	 when 	 replacing 	 FRUs.
•	 Be
	e

xtremely
	c
 areful
	dur
 ing
	suc
 h 	
wr
 ite
	o
 perations 	
a
 s 	
c
 opying,
	sa
 ving,
	o
 r
	formatting.

	
Drives
 	
in
 	
the
 	
computer
 	
that
 	
you
 	
are
 	
servicing
 	
sequence
 	
might	ha

ve
	be
 en 	
a
 ltered. 	
If
 	
you
 	
sel
 ect
	a
 n 	
i
 ncorrect
	dri
 ve, 	
da
 ta
	or
 	
progra
 ms 	
m
 ight
	be	overwritten.
•

	 Replace
	an
 	
F
 RU 	
onl
 y 	
wi
 th 	
anothe
 r
	F
 RU 	
of
 	
the	c
 orrect 	
mode
 l. 	
W
 hen 	
you	replace

	
an
 	
FRU,
 	
make
 	
sure
 	
that
 	
the
 	
machine
 	
model
 	
and
 	
the
 	
FRU
 	
part
 	
number
 	
are
 	
correct

	 by 	 referring 	 to 	 the 	 FRU 	 parts 	 list. 	
•

	 An 	
FRU
 	
should
 	
not
 	
be
 	
r
 eplaced 	
just
 	
because
 	
of
 	
a
 	
single,
 	
unr
 eproducible 	
failur
 e. 	
Single

	
failures
 	
can
 	
occur
 	
for
 	
a
 	
variety
 	
of
 	
reasons
 	
that
 	
have
 	
nothing
 	
to
 	
do
 	
with
 	
a	hardware

	
defect,
 	
such
 	
as
 	
cosmic
 	
radiation,
 	
electrostatic
 	
dischar
 ge, 	
or
 	
software	errors.

	 Consider 	 replacing 	 an 	 FRU 	 only 	 when 	 a 	 problem 	 recurs. 	 If 	 you 	 suspect 	 that 	
a

n
	FR
 U 	
i
 s 	
d
 efective,
	c
 lear
	t
 he
	e
 rror
	l
 ogs 	
a
 nd
	r
 un
	t
 he
	t
 est
	a
 gain.
	I
 f
	t
 he
	e
 rror
	d
 oes
	not

	 recur, 	 do 	 not 	 replace 	 the 	 FRU. 	
•	

Be 	 careful 	 not 	 to 	 replace 	 a 	 nondefective 	 FRU.  
						

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G40-30/G40-45/G40-70/G40-70m/Z40-70/Z40-75 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. Customer’s name and address
Note for warranty:  During the warranty period, the customer may be 
responsible for repair costs if the computer damage was caused by misuse\
, 
accident, modification, unsuitable physical or operating environment, or 
improper maintenance by the customer.
The following is a list of some common items that are not covered under 
warranty and some symptoms that might indicate that the system was 
subjected to stress beyond normal use.
Before checking problems with the computer, determine whether the damage is 
covered under the warranty by referring to the following list:
The following are not covered under warranty: 
• LCD panel cracked from the application of excessive force or from being 
dropped
• Scratched (cosmetic) parts
• Distortion, deformation, or discoloration of the cosmetic parts
• Plastic parts, latches, pins, or connectors that have been cracked or broken 
by excessive force
• Damage caused by liquid spilled into the system
• Damage caused by the improper insertion of a PC Card or the installation of 
an incompatible card
• Improper disk insertion or use of an optical drive 
• Diskette drive damage caused by pressure on the diskette drive cover, 
foreign material in the drive, or the insertion of a diskette with multi\
ple labels 
• Damaged or bent diskette eject button
• Fuses blown by attachment of a nonsupported device
• Forgotten computer password (making the computer unusable)
• Sticky keys caused by spilling a liquid onto the keyboard
• Use of an incorrect AC adapter on laptop products
The following symptoms might indicate damage caused by nonwarranted 
activities: 
• Missing parts might be a symptom of unauthorized service or modification. 
• If the spindle of a hard disk drive becomes noisy, it may have been subjected 
to excessive force, or dropped.  
						

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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 checkouts:
• “Checking the AC adapter” on page 21
• “Checking operational charging” on page 21
• “Checking the battery pack” on page 22
Checking the AC adapter 
You are here because the computer fails only when the AC adapter is used. 
• If the power-on indicator does not turn on, check the power cord of the AC 
adapter for correct continuity and installation.
• If the computer does not charge during operation, go to  “Checking 
operational charging” .
To check the AC adapter, follow the steps below:
1. Unplug the AC adapter cable from the computer.
2. Measure the output voltage at the plug of the  AC adapter cable. See the following figure:
1
2
9ROWDJH9& 
3LQ


Note:  Output voltage for the AC adapter pin No. 2 may differ from the one you 
are servicing.
3. If the voltage is not correct, replace the AC adapter.
4. If the voltage is acceptable, do the following: 
• Replace the system board.
• If the problem persists, go to “Lenovo G40-30/G40-45/G40-70/G40-70m/
Z40-70/Z40-75” on page 26 .
Note:  Noise from the AC adapter does not always indicate a defect.
Checking operational charging
To check whether the battery charges properly during operation, use a 
discharged battery pack or a battery pack that has less than 50% of the total 
power remaining when installed in the computer.   
						

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G40-30/G40-45/G40-70/G40-70m/Z40-70/Z40-75 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 boar\
d. Then 
reinstall the battery pack. If it is still not charged, go to the next s\
ection.
Checking the battery pack
Battery charging does not start until the Power Meter shows that less than 95% 
of the total power remains; under this condition the battery pack can charge to 
100% of its capacity. This protects the battery pack from being overcharged or 
from having a shortened life.
To check your battery, move your cursor to the Power Meter icon in the icon tray 
of the Windows® taskbar and wait for a moment (but do not click it), and the 
percentage of battery power remaining is displayed. To get detailed information 
about the battery, double-click the Power Meter icon.
Note: If the battery pack becomes hot, it may not be able to be charged. 
Remove it from the computer and leave it at room temperature for a while. After 
it cools down, reinstall and recharge it.  
						

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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 G40-30/G40-45/G40-70/G40-70m/Z40-70/Z40-75 computers come 
with  pre-installed  OneKey  Recovery  System.  In  order  to  save  application  files 
and the initial backed up files of the system, the hard disk in a Lenovo computer 
includes a hidden partition when it is shipped. If you need to restore the 
system  to  the  point  of  your  first  boot  up,  just  enter  Lenovo  OneKey  Recovery 
System and run System Recovery . For details of OneKey Recovery System,   
see  the User Guide for Lenovo OneKey Recovery system
.
Note:	This	will 	delete 	all 	the 	new 	data 	on 	the 	system 	partition 	(C 	drive), 	which 	is
	not 	recoverable. 	Make 	sure 	to 	back 	up 	your 	critical 	data 	before 	you 	perform 	this 	
action.
When you use the recovery discs to boot your computer, the system will enter 
the user interface for system recovery automatically. Please follow the prompt 
to insert the backup discs to complete the whole recovery process. 
Note:  The 	 recovery 	 process 	 might 	 take 	 up 	 to 	 2 	 hours. 	  
						

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G40-30/G40-45/G40-70/G40-70m/Z40-70/Z40-75 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 on by 
an unauthorized person. The password must be entered before an operating 
system can be booted.
Hard-disk password
There are two hard-disk passwords (HDPs):
+ User HDP - for the user
+ Master HDP - for the system administrator, who can use it to get access to 
the hard disk drive even if the user has changed the user HDP
Attention: If the user HDP has been forgotten, check whether a master HDP 
has been set. If it has, it can be used for access to the hard disk drive. If 
no master HDP is available, neither Lenovo nor Lenov authorized service 
technicians provide any services to reset either the user or the master HDP, or 
to recover data from the hard disk drive. The hard disk drive can be replaced 
for a scheduled fee.
Administrator password
Administrator password controls the access of the whole setup utility. Only 
Administrator password was set then User password can be set. If Administrator 
password was cleared, the User password was cleared too.  
						

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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 operation, press .
Putting the computer to sleep or shutting it down
When you have finished working with your computer, you can put it to sleep or 
shut it down.
Putting your computer to sleep
If you will be away from your computer for only a short time, put the co\
mputer to 
sleep. When the computer is in sleep mode, you can quickly wake it to resume 
use, bypassing the startup process. To put the computer to sleep, do one of the 
following:
• Close the display panel.
• Press the power button.
• Open the Charms and then select  Settings  → Power  → Sleep
.
Attention:  Wait until the power indicator light starts blinking (indicating that 
the computer is in sleep mode) before you move your computer. Moving your 
computer while the hard disk is spinning can damage the hard disk, causi\
ng 
loss of data.
To wake the computer, do one of the following:
• Press any key on the keyboard.
• Press the power button.
Shutting down the computer
If you are not going to use your computer for a long time, shut it down. To shut 
down your computer:
• Open the charms bar, then select  Settings  → Power  → Shut down.
• Right-click the 
Start button in the lower-left corner and select  Shut down or 
sign out  
→  
Shut down .  
						

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G40-30/G40-45/G40-70/G40-70m/Z40-70/Z40-75 Hardware Maintenance Manual
Lenovo G40-30/G40-45/G40-70/G40-70m/Z40-70/Z40-75
This chapter presents the following product-specific service references and 
product-specific parts information:
• “Specifications” on page 26
• “Status indicators” on page 29
• “Hotkeys” on page 30
• “FRU replacement notices” on page 31
• “Removing and replacing an FRU” on page 32
• “Locations” on page 66
• “Parts list” on page 68
Specifications
The following table lists the specifications of the Lenovo G40-30/G40-45/
G40-70/G40-70m/Z40-70/Z40-75: 
Table 1. Specifications
FeatureDescription
Processor
• See the  system  properties  of  your  computer,  you  can  do  this  as follows: Open the Control Panel , and then select  System and Security  
→  
System .
Bus architecture
• G40-30 GPU: PCIe 2.0, 5GT/s WLAN: PCIe 1.0, 2.5GT/s RAM: DDR3L, 1066MT/s,1333MT/s LCD: eDP  1.3, 2.7GT/s HDMI Port: HDMI 1.4, 1.65GT/s HDD: SATA 2.0, 3Gb/s ODD: SA TA 1.0, 1.5Gb/s USB Port: USB 3.0, 5Gb/s USB 2.0, 480Mb/s BT: USB2.0, 480Mb/s Card Reader: SD3.0, 50Mb/s SMBus 2.0 LPC 1.1 HDA SPI