Dell OptiPlex 990 (Early 2011) - Manual (Page 2)

2 Note the large mode number on the label. This number is important for step 7
of this procedure and you may want to write it down.
3 Replace the system board. For more information, see your system
documentation on support.dell.com.
4 Replace the computer cover. For more information, see your system
documentation on support.dell.com.
5 Disconnect any USB mass storage devices (such as hard drives or flash keys).
6 Disconnect the network cable.
7 Turn the computer on. When the initialization screen appears, enter the
mode number you obtained from the label inside the chassis.
WARNING: Once selected, you cannot change the management mode. If you make
the wrong selection, your computer may not operate as it should.
8 When a prompt appears to continue with your selection, enter Y if yes.
After the initialization completes, the computer shuts down.
9 Reconnect any USB mass storage devices (such as hard drives or flash keys).
10 Reconnect the network cable.
11 Restart the computer.
____________________
Information in this document is subject to change without notice.
© 2011 Dell Inc. All rights reserved.
Reproduction of these materials in any manner whatsoever without the written permission of Dell Inc.
is strictly forbidden.
Trademarks used in this text: Dell™, the DELL logo, Dell Precision™ and OptiPlex™ are trademarks of
Dell Inc.
Other trademarks and trade names may be used in this document to refer to either the entities claiming the
marks and names or their products. Dell Inc. disclaims any proprietary interest in trademarks and trade
names other than its own.
2011-03.
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