HP ProBook 6545b Maintenance And Service Manual page 147

Remove the card reader/USB board:
1. Release the ZIF connector to which the card reader/USB board cable is attached, and then disconnect the card
reader/USB board cable 1 from the system board.
2. Remove the slotted Torx T8M2.5×7.0 screw 2 that secures the card reader/USB board to the base enclosure.
3. Lift the left side 3 of the card reader/USB board to release the connectors from the openings in the base
enclosure.
4. Remove the card reader/USB board by sliding it up and to the left 4.
Reverse this procedure to install the card reader/USB board.
Maintenance and Service Guide
Removal and replacement procedures
4–73