Lenovo Yoga 8 Service Manual

Important service information
17 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. 

Lenovo B6000/B8000 Hardware Maintenance Manual
18
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...

General checkout
19
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:
General checkout
Important notes:
Only certified trained personnel can service the computer.
Before replacing any FRU, read the entire page on removing and 
replacing FRUs.
When you replace FRUs, use new nylon-coated screws.
Be extremely careful during such write operations as copying,...

Lenovo B6000/B8000 Hardware Maintenance Manual
20
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:...

General checkout
21
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 IdeaTab AC...

Lenovo B6000/B8000 Hardware Maintenance Manual
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1.Open the Android Settings screen.
To open the Android Settings screen, do either of the following:
– From the main Home screen, touch the Android Settings icon on 
Lenovo Launch Zone. The Android Settings screen is displayed.
– Pull down the right side of the action bar and then touch the Settings 
icon. The Android Settings screen is displayed.
2.Touch Battery in the Device section on the Android Settings screen.
3.The accurate percentage of the...

Related service information
23
This chapter presents the following information:
• “Security” on page 23
• “Power management” on page 23
Security settings include: SCREEN SECURITY, SIM CARD LOCK (3G version 
only), PASSWORDS, DEVICE ADMINISTRATION and CREDENTIAL 
STORAGE.
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.
Activating/Deactivating the Display...

Lenovo B6000/B8000 Hardware Maintenance Manual
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This chapter presents the following product-specific service references and 
product-specific parts information:
• “Specifications” on page 24
• “FRU replacement notices” on page 26
• “Removing and replacing an FRU” on page 27
• “Locations” on page 59
• “Parts list” on page 61
The following table lists the specifications of Lenovo B6000 and B8000.
Table 1. Specifications
FeatureDescription
Size & Weight
Size • Lenovo B6000: 213mm x 144mm x (3.0 - 7.3)mm
•...

Lenovo B6000 / B8000
25
Battery • Lenovo B6000: 
Li-ion type, 6000mAh
• Lenovo B8000: 
Li-ion type, 9000mAh
Operating System
• Android 4.2
Ports
•SIM card slot x1
(for Lenovo B6000-H and B8000-H only)
• Audio jack x1: 3.5mm 
(Combo type with audio and microphone 
function)
• Micro USB connector x1 
(for both power charge and data transfer)
• Micro SD card slot x1
Communication
• WiFi: 802.11 b/g/n 
• Wireless WAN: HSPA+ 42M 
(for Lenovo B6000-H and B8000-H only)
• 3G Band: WCDMA - 900/2100  
(for Lenovo...

Lenovo B6000/B8000 Hardware Maintenance Manual
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This section presents notices related to removing and replacing parts. Read this 
section carefully before replacing any FRU.
Screw notices
Loose screws can cause a reliability problem. In Lenovo computers, this problem 
is addressed with special nylon-coated screws that have the following 
characteristics:
• They maintain tight connections.
• They do not easily come loose, even with shock or vibration.
• They are harder to tighten.
• Each one should be...