HP Compaq Presario,Presario F500 Maintenance And Service Manual page 69

Remove the processor:
Use a flat-bladed screwdriver to turn the processor locking screw (1) one-half turn counterclockwise
1.
until you hear a click.
Lift the processor (2) straight up and remove it.
2.
NOTE: The gold triangle (3) on the processor should be aligned with the triangle icon (4)
embossed on the processor socket when you install the processor.
Reverse this procedure to install the processor.
Component replacement procedures 61