Compaq ProLiant 850R Setup And Installation Manual page 63

3-12 Installing Hardware Options
3. Remove the Feature Board and the expansion board below it, (if one is
installed). If you have an external battery connected to the Feature
Board disconnect it.
4. Remove the two screws from the disk drive cage and flip the cage and
rest it on the rear of the chassis and the Riser Board support bracket.
Figure 3-12. Removing the two screws and the disk drive cage
CAUTION: Disconnecting the Feature Board's external battery looses
stored configuration data. You must reconfigure your system when you
reconnect the battery.
CAUTION: When replacing a Pentium processor, you must release the
heat sink retaining clip prior to pulling the ZIF socket handle. This clip
engages the processor socket to hold the heat sink in place.