Turning o your computer
Turning o your computer — Windows 10
CAUTION: To avoid losing data, save and close all open les and exit all open programs before you turn o 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 o. If your computer and attached devices did not
automatically turn o when you shut down your operating system, press and hold the power button for about 6 seconds
to turn them o.
Turning o your computer — Windows 7
CAUTION: To avoid losing data, save and close all open les and exit all open programs before you turn o your
computer.
1 Click Start.
2 Click Shut Down.
NOTE
: Ensure that the computer and all attached devices are turned o. If your computer and attached devices did not
automatically turn o when you shut down your operating system, press and hold the power button for about 6 seconds
to turn them o.
Safety precautions
The safety precautions chapter details the primary steps to be taken before performing any disassembly instructions.
Observe the following safety precautions before you perform any installation or break/x procedures involving disassembly or reassembly:
• Turn o the system and all attached peripherals.
• Disconnect the system and all attached peripherals from AC power.
• Disconnect all network cables, telephone, and telecommunications lines from the system.
• Use an ESD eld service kit when working inside any desktop to avoid electrostatic discharge (ESD) damage.
• After removing any system component, carefully place the removed component on an anti-static mat.
• Wear shoes with nonconductive rubber soles to reduce the chance of getting electrocuted.
Standby power
Dell products with standby power must be unplugged before you open the case. Systems that incorporate standby power are essentially
powered while turned o. The internal power enables the system to be remotely turned on (wake on LAN) and suspended into a sleep
mode and has other advanced power management features.
After unplugging the system and before removing components, wait approximately 30 to 45 seconds to allow the charge to drain from the
circuits. Remove the battery from portable desktops.
Working on your computer
9
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