Dell PowerEdge R300 - Manual (Page 114)

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Installing System Components
13 To test the newly installed battery, turn off the system and disconnect it
from the electrical outlet for at least an hour.
14 After an hour, reconnect the system to its electrical outlet and turn it on.
15 Enter the System Setup program and if the time and date are still
incorrect, see "Getting Help" on page 167 for instructions on obtaining
technical assistance.
Control Panel Assembly
NOTE:
The control panel assembly consists of two separate modules—the display
module and the control panel circuit board. Use the following instructions to
remove and install either module.
Removing the Control Panel Assembly
CAUTION:
Many repairs may only be done by a certified service technician. You
should only perform troubleshooting and simple repairs as authorized in your
product documentation, or as directed by the online or telephone service and
support team. Damage due to servicing that is not authorized by Dell is not covered
by your warranty. Read and follow the safety instructions that came with the
product.
1 If applicable, remove the bezel. See "Removing the Front Bezel" on
page 69.
2 Turn off the system and attached peripherals, and disconnect the system
from the electrical outlet and peripherals.
3 Open the system. See "Opening the System" on page 71.
4 Disconnect the control panel cable at back of the control panel board. See
Figure 3-22.
NOTICE:
Do not pull on the cable to unseat the connector. Doing so can
damage the cable.
a Squeeze the metal tabs on the ends of the cable connector.
b Gently work the connector out of the socket.
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