Power supply BIST button is located near the power supply connector.
LCD built in self test (BIST)
All-in-One (AIO) systems supports LCD BIST similar to any other Dell systems that have BIST test implemented. It allows the user to isolate
the LCD during troubleshooting to determine which sub-system is at fault. The main dierence is the lack of an integrated keyboard scan
controller in the AIO. When BIST is initiated, an internal generated pattern from the LCD will be emitted for user's observation. This pattern
will go by sequence through this pattern. Black-White-Red-Green-Blue or a White-Black-Red-Green-Blue where each pattern is emitted for
2 to 3 seconds. The following images displays the pattern of the colors on the LCD.
Troubleshooting your computer 59
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