Lenovo ThinkPad T61 6458 Hardware Maintenance Manual page 115

Table 34. Removal steps of system board, PC Card/ExpressCard slots assembly (continued)
Turn the system board over, and then disconnect the PC Card/ExpressCard slots
assembly a from the system board.
a
2
When installing: Make sure that the connector of the PC Card/Express Card
slot assembly is attached to the system board firmly.
107
ThinkPad T61 and T61p (15.4-inch widescreen)