Dell OptiPlex 9020 AIO Owner's Manual page 38

NOTE: These instructions are valid only for non-touch computers. For touch computers, the display panel
should be disassembled in a clean-room environment.
3. Disconnect the LVDS cable from the display panel. Remove any other cables or antennae around the edges of the
base panel.
4. Remove the screws that secure the base panel to the chassis. Lift the base panel from the chassis.
5. Lift the display panel from the chassis.
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