3. Lift the processor (2) straight up and remove it.NOTE: The gold triangle (3) on the processor must be aligned with the triangle (4) embossedon the processor slot when you install the processor.Reverse this procedure to install the processor.Top coverDescription Spare part numberFor use in model 4330s/4331s:With a fingerprint reader and USB 3.0 646331-001Without a fingerprint reader and with USB 3.0 646333-001With a fingerprint reader and USB 2.0 658336-001Without a fingerprint reader and with USB 2.0 658337-001For use in model 4430s/4431s:With a fingerprint reader and USB 3.0 646335-001Without a fingerprint reader and with USB 3.0 646337-001With a fingerprint reader and USB 2.0 658338-001Without a fingerprint reader and with USB 2.0 658339-00172 Chapter 4 Removal and replacement procedures