Lenovo Yoga 3 Service Manual

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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...

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Lenovo YOGA 3 Pro-1370 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....

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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 power supply checkout:
•  “Checking the AC adapter” on page 21
•  “Checking operational...

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Lenovo YOGA 3 Pro-1370 Hardware Maintenance Manual
Perform  operational  charging.  If  the  battery  status  indicator  or  icon  is  not  lit, 
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 is still not lit, replace the system board.  

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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  YOGA  3  Pro-1370  computer  comes  with  pre-installed  OneKey 
Recovery  System.In  order  to  save  application  files  and  the  initial  backed  up 
files  of  the...

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Lenovo YOGA 3 Pro-1370 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  supervisor 
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...

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Related service information
Power management
Note:  Power  management  modes  are  not  supported  for  an  APM  operating 
system.
To  reduce  power  consumption,  the  computer  has  two  power  management 
modes: screen blank and sleep (standby).
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 
Fn + ` .
To end screen blank state and...

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Lenovo YOGA 3 Pro-1370 Hardware Maintenance Manual
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, do one of the following:
• Open the charms bar and select  Settings 
 → Power  → Shut down.
Chapter 2. Starting to use Windo\fs 8.1
19
„
Shutting do\fn the co\bputer
If yo u are  not g oing  t o  use yo ur comp uter for a lo ng ti me, sh ut it  dow n.
To sh ut dow n yo ur comp uter, do o ne of  the follow ing\f
 Ope n t he...

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Related service information
• On the Start screen, click       and select  Shut down.
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Chapter 2. Starting to use Windo\fs 8.1
 On t he  Star t scree n, cl ick   a nd selec t Shut down .
Note\bThis opera tion  depe nds on  your B\fO S se tting s. Please refer  to  the ac tual prod uct.Note: This operation depends on your BIOS settings. Please refer to the actual product.
20
Chapter 2. Starting to use Windo\fs 8.1
 On t he  Star t scree n, cl ick   a nd selec t Shut down .
Note\bThis opera tion...

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Lenovo YOGA 3 Pro-1370 Hardware Maintenance Manual
Lenovo YOGA 3 Pro-1370
This  chapter  presents  the  following  product-specific  service  references  and 
product-specific parts information:
• “Specifications” on page 26
•  “Status indicators” on page 28
•  “Fn key combinations” on page 29
•  “FRU replacement notices” on page 30
•  “Removing and replacing an FRU” on page 31
•  “Locations” on page 50
•  “Parts list” on page 52
Specifications
The following table lists the specifications of the...