HP Z220 SFF, Z220 CMT, Z420, Z620, and Z820 Workstations Maintenance and Service Guide

HP Z420 Workstation chassis components
1 Power supply 9 CPU
2 Side access panel 10 Memory module (DIMM)
3 Rear system fan 11 System board
4 Memory airflow guide 12 PCIe card
5 Hard disk drive 13 PCI card
6 Hard disk drive 14 Speaker
7 Optical drive 15 Front bezel
8 Heatsink 16 Chassis
18 Chapter 1 Hardware overview