HP Compaq NX4820 Maintenance And Service Manual page 176

4. Turn the top cover upside down with the front toward you.
✎
Steps 5 and 6 apply only to HP Pavilion dv1400 models. See
steps 7 and 8 in this section for information on removing the
system board on HP Compaq nx4820 and Compaq Presario
V2400 models.
5. Release the ZIF connector 1 to which the LED board cable is
connected and disconnect the cable 2 from the system board.
6. Remove the four silver PM2.0×5.0 screws 3 that secure the
system board to the top cover.
Disconnecting the LED Board Cable and Removing the System
Board Screws, HP Pavilion dv1400 models Only
Maintenance and Service Guide
Removal and Replacement Procedures
5–63