Dell Inspiron 15z (1570, Mid 2009) - Manual (Page 44)

For the Inspiron 1570 model, remove the three screws that secure the USB/audio board to the computer base.
15. Lift the USB/audio board and ease the USB and audio connectors out of the computer base.
Replacing the USB/Audio Board
1. Place the USB connectors, then the audio connectors into the computer base.
2. Align the USB/audio board using the alignment posts on the computer base.
3. Replace the screw(s) that secure the USB/audio board to the computer base.
4. Connect the speaker cable to the USB/audio board.
5. Connect the two USB/audio cables to the system board.
6. Replace the hard drive (see Replacing the Hard Drive ).
7. Replace the Bluetooth card (see Replacing the Bluetooth Card ).
8. Replace the palm rest (see Replacing the Palm Rest ).
9. Replace the keyboard (see Replacing the Keyboard ).
10. Replace the power button cover (see Replacing the Power Button Cover ).
1 USB/audio cables (2) 2 USB/audio board
3 screw (Inspiron 1470) 4 USB connectors (2)
5 speaker cable 6 audio connectors (2)
1 screws (3) (Inspiron 1570)