Use the arrow keys on the keyboard and select Diagnostics, and press the Enter key.

Turn on the computer and tap the F12 key several times until the One Time Boot Menu appears.

Carefully inspect the screen for abnormalities.

The screen changes colors to black, white, red, green, and blue.

Continue to hold the D key until you see the entire screen change colors.

Press and hold the D key and turn on the computer to enter the LCD built-in self-test (BIST) mode.

Ensure that the LCD screen is clean (no dust particles are on the surface of the screen).

Disconnect any devices that are connected to the computer, and connect the AC Adapter (charger).

When you notice screen abnormalities like flickering, distortion, clarity issues, fuzzy or blurry images, horizontal or vertical lines, color fade, running a diagnostic test on the LCD helps identify if the issue is with the LCD panel. Featuring an oversized metal frame with reflective lenses and signature triangle notches.

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