HP ProLiant ML570 Generation 2 Maintenance And Service Manual page 25

Removal and Replacement Procedures
3. Unlock both locks on the hot-plug door (1).
4. Slide the hot-plug door latches open (2).
5. Open the hot-plug door (3).
Figure 2-3: Opening the hot-plug door
Reverse steps 3 through 5 to close the hot-plug door.
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HP ProLiant ML570 Generation 2 Server Maintenance and Service Guide