Lenovo G570 Service Manual

							Lenovo G470/G475/
G570/G575
Hardware 
Maintenance 
Manual 
						

							Note:
Before  using  this  information  and  the  product  it  supports,  be  sure  to  read  the  general  information  under “Notices” on page 89.
First Edition (Dec. 2010)
© Copyright Lenovo 2010. All rights reserved.
LENOVO  products,  data,  computer  software,  and  services  have  been  developed  exclusively  at private  expense  and  are  sold  to  governmental  entities  as  commercial  items  as  defined  by  48  C.F.R. 2.101 with limited and restricted rights to use, reproduction and disclosure.
LIMITED AND  RESTRICTED  RIGHTS  NOTICE:  If  products,  data,  computer  software,  or  services are  delivered  pursuant  a  General  Services  Administration  ″GSA″  contract,  use,  reproduction,  or disclosure is subject to restrictions set forth in Contract No. GS-35F-05925.
© 2010 Lenovo 
						

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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 translations..........7Laser compliance statement.........................14
Important service information  ...................16Strategy for replacing FRUs  .........................16Strategy for replacing a hard disk drive ............17Important notice for replacing a system  board ................................................................17Important information about replacing RoHS compliant FRUs ............................................18
General checkout   ......................................19What to do first .............................................20Power system checkout................................21Checking the AC adapter  .................................21Checking operational charging  .........................21Checking the battery pack   ...............................22
Related service information  ......................23Restoring the factory contents by using  OneKey Recovery ........................................23Restore of factory default  .................................23Using recovery discs.........................................23Passwords ....................................................24Power-on password ..........................................24Supervisor password   .......................................24Power management  .....................................25Screen blank mode ...........................................25Sleep (standby) mode  ......................................25Hibernation mode .............................................26
Lenovo G470/G475/G570/G575..................27Specifications  ...............................................27Status indicators ...........................................29Fn key combinations.....................................31FRU replacement notices .............................32Screw notices   ..................................................32Removing and replacing an FRU  .................331010 Battery pack .............................................341020 Dummy cards...........................................351030 Optical drive .............................................361040 Hard disk drive (HDD)/Memory/CPU  (Central processing unit)/Mini PCI  ExpressCard slot compartment cover   .............37
1050 Hard disk drive  ........................................381060 DIMM  .......................................................401070 Fan assembly and Heat Sink  assembly...........................................................411080 CPU .........................................................441090 PCI Express Mini Card for  wireless LAN .....................................................451100 Keyboard ..................................................471110 Keyboard bezel  ........................................491120 Power board and touch inductive  panel .................................................................521130 System board  ............................................531140 LCD unit ...................................................561150 Speakers, bluetooth daughter card  and base cover  .................................................591160 LCD front bezel ........................................641170 LCD panel and hinges  .............................651180 Integrated camera ....................................671190 Antenna assembly and LCD cover ..........68Locations  ......................................................69Front view .........................................................69Right-side view  .................................................70Bottom and Left-side view  ...............................70Parts list ........................................................71Overall  ..............................................................72LCD FRUs  ........................................................77Keyboard ..........................................................79Miscellaneous parts ..........................................84AC adapters ......................................................85Power cords  ......................................................86
Notices.........................................................89Trademarks  ..................................................90 
						

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About this manual
This  manual  contains  service  and  reference  information  for  the  following Lenovo product:
Lenovo G470/G475/G570/G575
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.  
						

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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 G470/G475/G570/G575 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” on 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 G470/G475/G570/G575 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  up  with  your  leg  muscles;  this  action  could avoid the strain from the muscles in your back. Do not attempt to lift any 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.
Place  removed  covers  and  other  parts  in  a  safe  place,  keeping  them  away • from all personnel, while you are servicing the machine.
Keep your toolcase away from walk areas so that other people will not trip it • over.
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 customer .• 
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. 
						

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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 electrical shock. 
Find  the  room  emergency  power-off  (EPO)  switch,  disconnecting  the  switch • or  electrical  outlet.  If an  electrical  accident  occurs,  you  can  then  operate  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.  
						

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Lenovo G470/G475/G570/G575 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 • 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 units.)
If an electrical accident occurs:• 
– Caution: do not become a victim yourself.
– Switch off the power.
– Send the victim to get medical aid. 
						

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Safety information
Safety inspection guide
The  purpose  of  this  inspection  guide  is  to  assist  you  in  identifying  potential 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 the 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  not been removed or tampered with. 
						

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Lenovo G470/G475/G570/G575 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  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 product. • 
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.