Dell Vostro 5300 Service Manual - Page 54

LCD Built-in Self Test, Overview : LCD Built-in Self Test BIST, How to invoke LCD BIST Test

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LCD Built-in Self Test Overview : LCD Built-in Self Test (BIST) Dell laptops 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 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. 2. Disconnect any peripherals connected to the laptop. Connect only the AC adapter (charger) to the laptop. 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 laptop 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. NOTE: Dell ePSA upon launch, initiates a LCD BIST first, expecting an user intervention confirm functionality of the LCD. 54 Troubleshooting

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LCD Built-in Self Test
Overview : LCD Built-in Self Test (BIST)
Dell laptops 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 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.
2.
Disconnect any peripherals connected to the laptop. Connect only the AC adapter (charger) to the laptop.
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 laptop 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.
NOTE:
Dell ePSA upon launch, initiates a LCD BIST first, expecting an user intervention confirm functionality of the
LCD.
54
Troubleshooting