HP Compaq Presario,Presario C300 Maintenance And Service Manual page 141

4. Turn the top cover upside down with the front toward you.
5. Disconnect the power connector cable 1 from the
system board.
6. Remove the power connector 2 from the clip in the base
enclosure and remove the cable from the routing channel 3
in the top cover.
Removing the Power Connector Cable
Maintenance and Service Guide
Removal and Replacement Procedures
5–47