![Dell EMC PowerEdge MX740c Installation And Service Manual Download Page 81](http://html.mh-extra.com/html/dell/emc-poweredge-mx740c/emc-poweredge-mx740c_installation-and-service-manual_80251081.webp)
Optional internal USB memory key
An optional USB memory key installed inside your system can be used as a boot device, security key, or mass storage device. To
boot from the USB memory key, configure the USB memory key with a boot image and then specify the USB memory key in the
boot sequence in System Setup.
An optional USB memory key can be installed in the internal USB 3.0 port and can be used as a boot device, security key or
mass storage device.
The internal USB port is on the system board.
NOTE:
To locate the internal USB port on the system board, see the
System board jumpers and connectors
.
Replacing the optional internal USB memory key
Prerequisites
CAUTION:
To avoid interference with other components in the server module, the maximum permissible
dimensions of the USB memory key are 15.9 mm wide x 57.15 mm long x 7.9 mm high.
1. Follow the safety guidelines listed in
on page 16.
2. Follow the procedure listed in
Before working inside your sled
on page 17.
Steps
1. Locate the USB port or USB memory key on the system board.
NOTE:
To locate the USB port, see the
System board jumpers and connectors
section.
2. If installed, remove the USB memory key from the USB port.
3. Place the replacement USB memory key into the USB port.
Next steps
1. While booting, press F2 to enter System Setup and verify that the system detects the USB memory key.
2. Follow the procedure listed in
After working inside your sled
on page 17.
System battery
The system battery is used for low-level system functions such as powering the real-time and date settings of the system.
Replacing the system battery - Option A
Prerequisites
NOTE:
There is a danger of a new battery exploding if it is incorrectly installed. Replace the battery only with the same or
equivalent type recommended by the manufacturer. Discard used batteries according to the manufacturer's instructions.
See the safety instructions that came with your system for more information.
1. Follow the safety guidelines listed in
on page 16.
2. Follow the procedure listed in
Before working inside the sled
.
Steps
1. Locate the system battery on the system.
2. To remove the battery:
a. Push the battery toward the positive side of the battery until the battery disengages from the connector.
b. Lift the battery away from the system.
Installing and removing system components
81