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1. Power button
Press to turn on the computer if it is turned off, in sleep state, or in hibernate state.
When the computer is turned on, press the power button to put the computer into sleep state; press and hold the power
button for 10 seconds to force shut-down the computer.
NOTE: You can customize the power-button behavior in Windows.
2. Display Built-in Self Test button/Input-source selection button
This button has two functions:
ā When the computer is on, use this button to select the video input-source.
Press the button to switch the display between the internal system display and HDMI input.
ā When the computer is off (there is no power; neither is it in sleep state nor hibernate state), use this button to run the
built-in self-test for the display.
Press and hold down this button, and then press the power button to turn on the computer. The built-in color pattern for
the LCD monitor will appear on the screen.
For more information, see the Troubleshooting section in the Service Manual at Manuals at Dell Support Site.
3. Service Tag label
The Service Tag is a unique alphanumeric identifier that enables Dell service technicians to identify the hardware
components in your computer and access warranty information.
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