Lenovo 3254ACU, Hardware Maintenance Manual

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Attention: The system board is sensitive to, and can be damaged by, electrostatic discharge. Before
touching it, establish personal grounding by touching a ground point with one hand or by using an
electrostatic discharge (ESD) strap.
Before servicing ThinkPad Edge E430 and E430c models
Some ThinkPad Edge E430 and E430c models you are servicing might have the SIM card that the customer
has installed. If the computer you are servicing has the SIM card installed, remove it before you start
the servicing.
To remove the SIM card, you need to remove the battery pack first. See “1010 Battery pack” on page 60.
After you finish the servicing, make sure that you insert the card back into the slot firmly.
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1010 Battery pack
Important notice for replacing a battery pack:
• The Lenovo Solution Center program provides an automatic battery diagnostic test that determines if the battery
pack is defective. A battery pack FRU should not be replaced unless this diagnostic test shows that the battery is
defective. The only exception to this is if the battery pack is physically damaged or a customer is reporting
a possible safety issue.
• If Lenovo Solution Center is not installed in the computer, the customer should download this program before a
non-physically damaged battery pack is replaced. Note that a physically damaged battery pack is a non-warranty
replacement part.
Removal steps of battery pack
DANGER
Use only the authorized battery specified for your computer. Any other battery could ignite or
explode.
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Hardware Maintenance Manual