Dell Vostro 3070, Service Manual, Page: 6 / 69

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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 or
remove the side cover.
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.
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Before working inside your computer
1 Ensure that your work surface is flat and clean to prevent the computer cover from being scratched.
2 Turn off your computer.
3 If the computer is connected to a docking device (docked), undock it.
4 Disconnect all network cables from the computer (if available).
CAUTION: If your computer has an RJ45 port, disconnect the network cable by first unplugging the cable from your
computer.
5 Disconnect your computer and all attached devices from their electrical outlets.
6 Open the display.
7 Press and hold the power button for few seconds, to ground the system board.
CAUTION: To guard against electrical shock unplug your computer from the electrical outlet before performing Step # 8.
CAUTION: To avoid electrostatic discharge, ground yourself by using a wrist grounding strap or by periodically touching an
unpainted metal surface at the same time as touching a connector on the back of the computer.
8 Remove any installed ExpressCards or Smart Cards from the appropriate slots.
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After working inside your computer
After you complete any replacement procedure, ensure that you connect 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 Connect any external devices, such as a port replicator or media base, and replace any cards, such as an ExpressCard.
2 Connect any telephone or network cables to your computer.
6 Working on your computer