HP 550 Maintenance And Service Manual page 83

Remove the processor:
1. Turn the system board upside down, with the USB connectors toward you.
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 (2) straight up and remove it.
NOTE: When you install the processor, the gold triangle (3) on the processor must be aligned
with the triangle (4) embossed on the processor socket.
Reverse this procedure to install the processor.
Component replacement procedures 75