Lenovo Miix 2 Service 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  settings remain in effect.
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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IdeaPad Miix 2 8 Hardware Maintenance Manual
Important information about replacing RoHS compliant FRUs
R o H S ,   T h e   R e s t r i c t i o n   o f   H a z a r d o u s   S u b s t a n c e s   i n   E l e c t r i c a l   a n d 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 2006Products marketed after June 2006 
Current or  original part Replacement FRU Current or  original part Replacement FRU
Non-RoHSCan be Non-RoHS
Must be RoHSMust be RoHSNon-RoHSCan be RoHS
Non-RoHSCan sub to RoHS
RoHSMust 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	replacing 	any 	FRU, 	read 	the 	entire 	page 	on 	removing 	and 	replacing	
FRUs.
•	 Carefully	remove	screws	for 	reuse	when	replacing	FRUs.
•	 Be 	extremely 	careful 	during 	such 	write 	operations 	as 	copying, 	saving, 	or 	
formatting.   Drives  in  the  computer  that  you  are  servicing  sequence  might 
have  been  altered.  If  you  select  an  incorrect  drive,  data  or  programs  might  be 
overwritten.
•	 Replace 	an 	FRU 	only 	with 	another 	FRU 	of 	the 	correct 	model. 	When 	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 	replaced 	just 	because 	of 	a 	single, 	unreproducible 	
failure. 	Single  failures  can  occur  for  a  variety  of  reasons  that  have  nothing  to 
do  with  a  hardware  defect,  such  as  cosmic  radiation,  electrostatic  discharge,  or 
software  errors.  Consider  replacing  an  FRU  only  when  a  problem  recurs.  If  you 
suspect that an FRU is defective, clear the error logs and run the test again. If the 
error does not recur, do not replace the FRU. 
•	 Be	careful	not	to	replace	a	nondefective	FRU. 
						

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IdeaPad Miix 2 8 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
N o t e   f o r   w a r r a n t y :  D u r i n g   t h e   w a r r a n t y   p e r i o d ,   t h e   c u s t o m e r   m a y   b e 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 w a r r a n t y   a n d   s o m e   s y m p t o m s   t h a t   m i g h t   i n d i c a t e   t h a t   t h e   s y s t e m   w a s 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 disc 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. Connect the AC adapter.
3. Make sure that power is supplied when you turn on the computer.
4. Turn off the computer.
5. Disconnect the AC adapter.
6. 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 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.
• I f   t h e   c o m p u t e r   d o e s   n o t   c h a r g e   d u r i n g   o p e r a t i o n ,   g o   t o   “ C h e c k i n g 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:
9ROWDJH9&

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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 continues, go to “Lenovo IdeaPad Miix 2 8” 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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IdeaPad Miix 2 8 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  board.  Then reinstall the battery pack.  
						

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Related service information
Related service information
This chapter presents the following information:
• “Restoring the factory contents by using Recovery system” on page \
23
• “Passwords” on page 24
• “Power management” on page 25
Restoring the factory contents by using Recovery system
Restore of factory default
The  Lenovo  IdeaPad  Miix  2  8  computers  come  with  pre-installed  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  Recovery  system  and  run System  Recovery.  For  details  of Recovery system, see the User Guide for Lenovo 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. 
						

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IdeaPad Miix 2 8 Hardware Maintenance Manual
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. 
Passwords
As many as two passwords may be needed for any Lenovo IdeaPad computer: the power-on password (POP) and the supervisor password (SVP).
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.
Exception:  If  only  an  SVP  is  installed,  the  password  prompt  does  not  appear when the operating system is booted.
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.
Supervisor password 
A  supervisor  password  (SVP)  protects  the  system  information  stored  in  the BIOS  Setup  Utility.  The  user  must  enter  the  SVP  in  order  to  get  access  to  the BIOS Setup Utility and change the system configuration.
Attention:  If  the  SVP  has  been  forgotten  and  cannot  be  made  available  to the  servicer,  there  is  no  service  procedure  to  reset  the  password.  The  system board must be replaced for a scheduled fee.  
						

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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 mode
If  the  time  set  on  the  “Turn  off  monitor”  timer  in  the  operating  system  expires, the LCD backlight turns off.
To end screen blank mode and resume normal operation, press any key.
Putting your tablet to sleep
If you will be away from your tablet briefly, put the tablet to sleep.
When  the  tablet  is  in  sleep  mode,  you  can  quickly  wake  it  to  resume  use, bypassing the startup process.
To put the tablet to sleep, do one of the following:
• Press the Power button.
• Open the charms and then select Settings  → Power  → Sleep.
To wake the tablet, do one of the following:
• Press the Power button.
• Press the Windows button. 
						

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IdeaPad Miix 2 8 Hardware Maintenance Manual
Lenovo IdeaPad Miix 2 8
This  chapter  presents  the  following  product-specific  service  references  and product-specific parts information:
• “Specifications” on page 26
• “Function key combinations” on page 28
• “FRU replacement notices” on page 29
• “Removing and replacing an FRU” on page 30
• “Locations” on page 54
• “Parts list” on page 57
Specifications
The following table lists the specifications of the Lenovo IdeaPad Miix 2 8: 
Table 1. Specifications
FeatureDescription
Processor•  To  view  the  system  properties  of  your  computer:  Open  the Control Panel. Then select System and Security → System.Display•  IPS 8” 800 × 1,280 pixels Standard memory• 2GB LPDDR3
eMMC • 64 GB 32 GB/128 GB (on select models)I/O port • Micro USB port × 1• Micro SD card slot × 1• SIM card slot × 1 (on select models)Audio• Combo audio jack × 1