Before Servicing Thinkpad X220 And X220I Models - Lenovo ThinkPad X220 4287 Hardware Maintenance Manual

Before servicing ThinkPad X220 and X220i models

Removing the SIM card:
Some models of the ThinkPad X220 and X220i you are servicing might have the SIM card that the customer has
been installed.
If the computer you are servicing has the SIM card, 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 63.)
After you finish the servicing, make sure that you insert the card back into the slot firmly.
Notice on disconnecting a cable from a flip-lock ZIF connector:
Some cables used in ThinkPad X220 and X220i models are connected to flip-lock ZIF connectors.
When disconnecting a cable from a flip-lock ZIP connector, do as shown in the following figure.
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ThinkPad X220 and X220i Hardware Maintenance Manual
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