1. Shut down the operating system.
2. Ensure that the computer and all attached devices are turned off. If your computer and attached devices did not automatically turn off when you shut
down your operating system, press and hold the power button for about 4 seconds to turn them off.
After Working on Your Computer
After you have completed any replacement procedures, ensure that you connect any external devices, cards, cables, and so on, before turning on your
computer.
1. Replace the computer cover (see Replacing the Computer Cover).
2. Connect any telephone or network cables to your computer.
3. Connect your computer and all attached devices to their electrical outlets.
4. Turn on your computer.
5. Verify that the computer works correctly by running the Dell Diagnostics (seeDell Diagnostics).
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