HP DL120 - Manual (Page 70)

Removal and replacement procedures 70
To replace the power supply unit:
1. Perform the pre-installation procedure.
2. Disconnect the system power cables.
a. Disconnect all power cables connected to the system drives (1).
b. Unlatch the drive power cables from the front chassis cable tie, and then pull them through
the center wall (2).
c. Disconnect the system board’s (PWR_CN) and processor’s (CN4) ATX power cables from
their system board connectors (3).
d. Unlatch the ATX power cables from their chassis cable tie (4).