Lenovo Yoga 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...

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Lenovo Yoga 2 Pro (13″) 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...

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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 2 Pro (13″) 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...

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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 checkou\
t:
• “Checking the AC adapter” on page 21
• “Checking operational charging” on page 21...

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Lenovo Yoga 2 Pro (13″) 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  2  Pro  (13″)  computer  comes  with  pre-installed  OneKey Recovery System.In order to save application files and the initial backe\
d up files of the system, the...

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Lenovo Yoga 2 Pro (13″) 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  system  from  being  powered  on  by an...

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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 .
To end screen blank state and resume normal operation, press .
Putting the computer to sleep...

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Lenovo Yoga 2 Pro (13″) 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:
• Open the charms, then select Settings  → Power  → Shut down.
• Right-click the Windows icon  on the desktop lower-left corner. Then 
select Shut down from the Shut down menu options.