Lenovo B5400 Service Manual

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Related service information
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:
• For the Windows 7 operating system: Click Start → Shut down.
• For the Windows 8 operating system:
Move your cursor to the lower-right corner of the screen to open the
charms bar, then select Settings  → Power  → Shut down. 

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Lenovo B5400/M5400/M5400 Touch Hardware Maintenance Manual
Lenovo B5400/M5400/M5400 Touch
This chapter presents the following product-specific service references and 
product-specific parts information:
• “Specifications” on page 28
• “Status indicators” on page 30
• “Fn key combinations” on page 31
• “FRU replacement notices” on page 32
• “Removing and replacing an FRU” on page 33
• “Locations” on page 69
• “Parts list” on page 72
Specifications
The  following  table  lists  the  specifications  of...

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Lenovo B5400/M5400/M5400 Touch
Table 1. Specifications (continued)
FeatureDescription
Keyboard
•	 6	Row,	Lenovo	KeyboardTouch	pad	•	 Multi-touch	typeIntegrated	camera•	 0.3	MP	 or 	 HD 	 720P	 (B5400)•	 Integrated	720P	(M5400/M5400 	T ouch)Battery•	 6	cell,	2.2	AhAC	adapter•	 20	V,	65	W	or	90	WPre-installed	operating	system	•	 Win7	or	Win8/Win8.1 

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Lenovo B5400/M5400/M5400 Touch Hardware Maintenance Manual
Status indicators
The system status indicators below show the computer status:

Table 2. Status indicators
IndicatorMeaning
1Power and battery status indicator
• Green: The battery has a charge between 20% and 100% and the computer is powered on.• Blinking green: The battery has a charge between 20% and 100% and the computer is in sleep or hibernate mode.• Amber: The battery has a charge of 20% or less and the computer is powered on.•...

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Lenovo B5400/M5400/M5400 Touch
Fn key combinations
The following table describes the functions of Fn key combinations.
Table 3. Function key combinations
Fn+Esc:
• On the Windows 7 operating system: Press Fn+Esc to open the camera and audio settings window. The camera preview is turned on. Change the camera and audio settings as desired.• On the Windows 8 operating system: Press Fn+Esc to enable or disable the camera.
Fn+F1:Enters sleep mode.
Fn+F2:Turns on/off the backlight of the LCD screen....

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Lenovo B5400/M5400/M5400 Touch Hardware Maintenance Manual
FRU replacement notices
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 the Lenovo computer, 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...

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Lenovo B5400/M5400/M5400 Touch
Removing and replacing an FRU
This  section  presents  exploded  figures  with  the  instructions  to  indicate  how  to remove and replace the FRU. Make sure to observe the following general rules:
1. Do not attempt to service any computer unless you have been trained and certified. An untrained person runs the risk of damaging parts.
2. Before replacing any FRU, review “FRU replacement notices” on page 32.
3. Begin by removing any FRUs that have to be removed before...

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Lenovo B5400/M5400/M5400 Touch Hardware Maintenance Manual
1010 Battery pack
 DANGER
Only	use	the	battery	 specified	 in	the	 parts	 list	for	your	 computer.	 Any	other	 battery	
could	ignite	or	explode.	
Figure 1. Removal steps of battery pack
Unlock the manual battery latch 1. Holding the spring-loaded battery latch in the unlocked position 2, remove the battery pack in the direction shown by the arrow 3.



When installing: Install the battery pack along the slide rails of the slot. Then make...

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Lenovo B5400/M5400/M5400 Touch
1020 Base cover
For access, remove this FRU:
• “1010 Battery pack” on page 34
Figure 2. Removal steps of base cover
Remove the screws 1. Then remove the base cover 2.



StepScrew (quantity)ColorTorque
1M2 × 4 mm, flat-head, nylok-coated (2) Door to BASEBlack1.85+/-0.15 kgf*cm 

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Lenovo B5400/M5400/M5400 Touch Hardware Maintenance Manual
Note: Applying labels to the base cover
The new base cover FRU is shipped with a kit containing labels of several 
kinds. When you replace the base cover, you need to apply the following 
labels: 
The following labels need to be peeled off from the old base cover and put on 
the new base cover. 
a Barcode label
b KCC label
c Indonesia D side label
d Rating label
e GML label
f COA labelg BT label
h WL label
For some models, you also need to...