HP (Hewlett-Packard) 2307890A ユーザーズマニュアル

To replace the internal hard disk drive:

Replace the old hard disk drive with the new hard 
disk drive (A).

Replace the four hard disk drive screws (B). Tighten 
the screws an additional half-turn only after the 
screws contact the rubber washer.

Reconnect the hard disk drive cables.

Place the hard disk drive into the chassis. Position the 
metal tabs.

Replace the hard disk drive cover on the chassis. 
Slide the cover away from screw (A) and then tighten 
the screw (B).