HP Compaq Presario,Presario C770 Maintenance And Service Manual page 90

Remove the processor:
Turn the system board upside down, with the audio connectors toward you.
1.
Turn the processor locking screw (1) one-half turn counterclockwise until you hear a click.
2.
Lift the processor (2) straight up and remove it.
3.
NOTE:
the triangle icon (4) embossed on the processor slot.
Reverse this procedure to install the processor.
82 Chapter 4 Removal and replacement procedures
When you install the processor, the gold triangle (3) on the processor must be aligned with