HP Compaq Presario,Presario C300 Maintenance And Service Manual page 146

Removal and Replacement Procedures
16. Set the USB/audio board cable and modem connector
cable aside.
17. Lift the system board and separate the speakers from the
system board.
✎
The speakers are available using spare part number
407785-001.
Removing the Speakers
Reverse the above procedure to install the system board.
5–52 Maintenance and Service Guide