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Dell OptiPlex All-in-One Plus 7420 - Installing the power-button and I;O board

Dell OptiPlex All-in-One Plus 7420
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Figure 71. Removing the power-button and I/O board
Steps
1. Remove the three screws (M3x5) that secure the power-button and I/O board shield to the display-assembly base.
2. Lift the power-button and I/O board shield off the display-assembly base.
3. Lift the latch and disconnect the power cable from its connector (DB-PWR) on the power-button and I/O board.
4. Lift the latch and disconnect the high-speed cable from its connector (DB-HS) on the power-button and I/O board.
5. Remove the two screws (M3x5) that secure the power-button and I/O board to the display-assembly base.
6. Lift the power-button and I/O board off the display-assembly base.
Installing the power-button and I/O board
CAUTION: The information in this installation section is intended for authorized service technicians only.
Prerequisites
If you are replacing a component, remove the existing component before performing the installation process.
102
Removing and installing Field Replaceable Units (FRUs)

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