Lenovo B5400 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 B5400/M5400/M5400 Touch 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...

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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 B5400/M5400/M5400 Touch 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...

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General checkout 
Power system checkout
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:...

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Lenovo B5400/M5400/M5400 Touch 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 boar\
d. Then reinstall the battery pack. If it is still not charged, go to the next s\
ection.
Checking 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 OneKey Recovery” on page \
23
• “Passwords” on page 25
• “Power management” on page 26
Restoring the factory contents by using OneKey Recovery
Restore of factory default
This topic provides information about the recovery programs that are ava\
ilable for you to recover the computer settings.
• Windows 7: The following recovery programs are available on...

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Lenovo B5400/M5400/M5400 Touch Hardware Maintenance Manual
• Windows 8: The preinstalled Windows recovery program enables you to do the following:
– Refresh the computer without losing personal files
– Restore the computer to the factory default settings
Attention: When you use the Windows recovery program to restore the computer settings, all the data you have stored on the hard disk drive will be deleted and the computer will be restored to the factory default\
 settings. To avoid data loss, back up...

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Related service information
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 unauthorized person. The password must be entered...

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Lenovo B5400/M5400/M5400 Touch Hardware Maintenance Manual
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, 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 ....