Dell Precision Workstation 340 Service Manual page 59

6. Orient the replacement board by aligning the notches on the bottom to the tabs on the computer floor.
7. Slide the board toward the back of the computer until it clicks into place.
8. Replace any components and cables that you removed from the system board.
9. Reconnect all cables to their connectors at the back of the computer, close the computer cover, and reconnect the computer and devices to their power
sources and turn them on.
NOTE: After you close the cover, the chassis intrusion detector causes the following message to be displayed at the next computer start-up: Alert!
Cover was previously removed.
10. Set the jumpers on the new system board so that they are identical to those on the original board.
11. Run system setup to ensure that your settings are correct and that all system board components are correctly identified.
12. Run the Dell Diagnostics to verify that the computer is operating properly.
For more information on system setup and the Dell Diagnostics, see your User's Guide.
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Reset the chassis intrusion detector.