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Before servicing the computer
Carefully read this topic before servicing the computer.
Disabling the battery pack in the UEFI BIOS
Before replacing any FRU, ensure that you have disabled the built-in battery by doing the following:
1. Turn off the computer. Disconnect the ac power adapter and all the cables from the computer.
2. Turn on the computer. When the ThinkPad logo is displayed, press F1 to enter the ThinkPad Setup
program.
3. Select Cong ➙ Power. The Power submenu is displayed.
4. Select Disable built-in battery.
5. Click Yes in the Setup Warning window, then the computer will be turned off automatically. Wait for
three to ve minutes to let the computer cool.
Note: After the battery pack is disabled in the UEFI BIOS, it will be automatically enabled when ac power is
reconnected.
Removing the SIM card
Some 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.
1
2
After you nish the servicing, ensure that you insert the card back into the slot rmly.
1010 Bottom cover
Removal steps of bottom cover
Slide the bottom cover latch to the unlocked position 1 . Hold the latch in the unlocked position, and then
remove the bottom cover 2 .
58 Hardware Maintenance Manual