HP Compaq Presario,Presario C300 Maintenance And Service Manual page 160

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