Lcd Built-In Self Test; Overview : Lcd Built-In Self Test (Bist); How To Invoke Lcd Bist Test - Dell Latitude 5424 Rugged Owner's Manual

LCD Built-in Self Test

Overview : LCD Built-in Self Test (BIST)

Dell laptop PCs have a built-in diagnostic tool that helps you determine if the screen abnormality you are experiencing is an inherent
problem with the LCD (screen) of the Dell laptop PC or with the video card (GPU) and PC settings .
When you notice screen abnormalities like flickering, distortion, clarity issues, fuzzy or blurry image, horizontal or vertical lines, color fade
etc., it is always a good practice to isolate the LCD (screen) by running the built-in self test (BIST).

How to invoke LCD BIST Test

1 Power off the Dell laptop PC.
2 Disconnect any peripherals connected to the PC. Connect only the AC adapter (charger) to the PC.
3 Make sure that the LCD (screen) is clean (no dust particles on the surface of the screen).
4 Press and hold D key and Power on the PC to enter LCD built-in self test (BIST) mode. Continue to hold the D key, until you see color
bars on the LCD (screen).
5 The screen will display multiple color bars and change colors on the entire screen to red, green and blue.
6 Carefully inspect the screen for abnormalities.
7 Press Esc key to exit.
204 Diagnostics