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3.6 Replacing power supplies
Chapter 3: Replacing pre-installed components 43
3.6 Replacing power supplies
The B4881V50S4H has four hot-swap, redundant power sup-
ply bays.
To replace a power supply:
1. Unplug the power cable from the faulty power supply.
2. Loosen the retaining screw.
3. While pressing the release catch, pull the faulty power
supply from the chassis using the handle.
4. Push the new power supply into place and secure with
the retaining screw.
Note: When the CPU expansion board is
installed, A bare minimum of three power
supplies are required to run the
B4881V50S4H. A fourth power supply
should be installed as soon as possible in
the event of a failure.
3.7 Replacing cooling fans
The B4881V50S4H requires three chassis cooling fans.
To replace a cooling fan:
1. Remove the chassis cover. See Removing the chassis
cover on page 13.
2. Remove the CPU expansion board as described in
“Replacing the CPU expansion board” on page 37
Release catch