2. Replace the I/O board assembly. See “Replacing the I/O Board Assembly” (page 225).
3. Reconnect the power cables and power on the server. See “Powering On the Server” (page 90).
4. Reset the server date and time using the EFI date and time commands.
Removing and Replacing the I/O Voltage Regulator Module
The I/O voltage regulator module (I/O VRM) is a stand alone component located on the I/O
board assembly that regulates voltage for all I/O operations.
WARNING! Ensure that the system is powered off and all power sources have been disconnected
from the server prior to performing this procedure.
Voltages are present at various locations within the server whenever an AC power source is
connected. This voltage is present even when the main power switch is in the off position.
Failure to observe this warning can result in personal injury or damage to equipment.
CAUTION: Observe all ESD safety precautions before attempting this procedure. Failure to follow
ESD safety precautions can result in damage to the server.
Removing the I/O VRM
To remove the I/O VRM, follow these steps:
1. Power off the server and disconnect the power cables. See “Powering Off the Server”
(page 90).
2. If rack installed, slide the server completely out from the rack. See “Extending the Server from
the Rack” (page 176).
3. Remove the top cover. See “Removing the Top Cover” (page 178).
4. Remove the I/O VRM cover (Figure 79).
a. Locate the knurled thumbscrew on top of the I/O VRM cover and turn it counterclockwise
until the cover disengages from the chassis wall.
b. Lift the cover off the I/O VRM.
5. Push the extraction levers found on either side of the I/O VRM slot outward to the open position
to release the I/O VRM from the socket.
6. Grasp the I/O VRM by the edges and lift it out of the chassis (Figure 79).
Removing and Replacing the I/O Voltage Regulator Module 229
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