Follow the steps in this article to start the Liquid Crystal Display Built-In Self-Test (LCD BIST) on the Dell OptiPlex 9020 All-in-One (AIO) computer.
How do I test the display on my OptiPlex 9020 AIO System?
Start the Built-In Self-Test
OptiPlex 9020 All-in-One systems have an LCD Built-In Self-Test (BIST) you can activate and run following the steps below:
- On the right side of the LCD, there is the power button and 3 additional buttons above the Hard Drive activity LED.
- With the system off, press and hold the bottom of the three buttons. While holding the 3rd button, press and release the power button: (Figure 1)
Figure 1. - Pressing 3rd button and power button to start the LCD BIST
- The LCD will display solid color screens in RED, GREEN, BLUE, BLACK and WHITE, then a Text Page.
These screens allow you to detect color and distortion defects in the LCD.