Dell OptiPlex SX260 - Manual (Page 10)

8 Replacing the System Board
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c Replace the five silver screws that you removed in step 10.
d Reinstall the heat sink retention base by reinserting the four green
screws that you removed in step 9.
e Replace all of the components that you removed in step 8.
16 Reattach the stand (if used).
17 Attach the computer to the mounting plate (if used).
18 Replace the cable cover (if used).
NOTICE: To connect a network cable, first plug the cable in to the network
wall jack and then in to the computer.
19 Connect your computer to the adapter cable and to an electrical
outlet, connect any devices to electrical outlets, and then turn on the
computer and devices.
After you replace the cover, the chassis intrusion detector, if enabled,
causes the following message to appear on the screen at the next
computer start-up:
ALERT! Cover was previously removed.
20 Reset the chassis intrusion detector by changing the Chassis Intrusion
option to Enabled or Enabled-Silent.