Turning Off Your Computer - Windows 10; After Working Inside Your Computer - Dell Precision 3520 Owner's Manual

8 Remove any installed ExpressCards or Smart Cards from the appropriate slots.
Turning off your computer — Windows 10
CAUTION: To avoid losing data, save and close all open files and exit all open programs before you turn off your
computer.
1 Click or tap .
2 Click or tap and then click or tap Shut down.
NOTE: 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 6 seconds
to turn them off.

After working inside your computer

After you complete any replacement procedure, ensure you connect any external devices, cards, and cables before turning on your
computer.
CAUTION: To avoid damage to the computer, use only the battery designed for this particular Dell computer. Do not use batteries
designed for other Dell computers.
1 Replace the battery.
2 Replace the base cover.
3 Connect any external devices, such as a port replicator or media base, and replace any cards, such as an ExpressCard.
4 Connect any telephone or network cables to your computer.
CAUTION: To connect a network cable, first plug the cable into the network device and then plug it into the
computer.
5 Connect your computer and all attached devices to their electrical outlets.
6 Turn on your computer.
8 Working on your computer