7.To prevent unauthorized access inside the system, insert and lock a padlock through the loop at the back (one at each side).
Note: If your system is already set up, plug the system back in, reconnect the peripherals, and power on the peripherals and system.
Removing the Top Cover
Note: The top cover does not have to be removed in order to install any upgrades or options.
You must remove both side covers before you can remove the top cover.
Caution: For proper cooling and airflow, do not operate the system with the top cover removed. Always replace the cover before powering on the system.
Caution: Do not damage or bend the EMI fingers that are located on the bottom of the cover as you remove and install it, or your system may not meet EMI requirements.
Warning: If you are removing the top cover after the system is set up, you must first power off the system and all external devices. Unplug the system power cord.
To remove the top cover:
1.Power off the system and ensure it is disconnected from the ac wall outlet.
2.Observe the safety and ESD precautions listed at the beginning of this chapter.
3.Remove both side panels.
4.At the back, remove two retaining screws from the top cover (see Figure
