Lenovo ThinkPad T400 6474 Hardware Maintenance Manual page 140

Table 28. Removal steps of system board and PC Card/Express Card slots (or
ExpressCard/Smart Card slots or ExpressCard/7-in-1 Media Card Reader slots)
assembly (continued)
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ThinkPad T400 and R400 Hardware Maintenance Manual
Turn the system board over, and then disconnect the PC Card/ExpressCard slots
assembly or ExpressCard/Smart Card slots assembly or ExpressCard/7-in1
Media Card Reader slots assembly a from the system board.
When installing: Make sure that the connector of the card slot assembly is
attached to the system board firmly.
a
2