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1. Display Built-in Self Test button

This button has two functions:

● 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.

● 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 selftest

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 www.dell.com/support/manuals.

2. Service tag label

Inside view of your computer

NOTE:

The appearance of heat sink differs depending on the graphics configuration you ordered.

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