HP Compaq Presario,Presario V4000 Maintenance And Service Manual page 129

3. Use a flat-bladed screwdriver to turn the processor locking
screw one-half turn counterclockwise 1 until you hear
a click.
4. Lift the processor straight up and remove it 2.
✎
The gold triangle 3 on the processor should be aligned in the
rear right corner when you install the processor.
Removing the Processor
Reverse the above procedure to install the processor.
Maintenance and Service Guide
Removal and Replacement Procedures
5–25