Dell OptiPlex All-in-One Plus 7420 - Coin-cell battery; Removing the coin-cell battery

Figure 38. Moving the solid-state screw mount on M.2 slot 1
Steps
1. Remove the screw mount on the system board.
2. Install the screw mount on the system board.
Next steps
1. Install the M.2 2230 solid-state drive in slot 1 or the M.2 2280 solid-state drive in slot 1, whichever is applicable.
2. Install the I/O cover.
3. Install the system-board shield.
4. Install the back cover.
5. Install the stand.
6. Follow the procedure in After working inside your computer.
Coin-cell battery
Removing the coin-cell battery
Prerequisites
1. Follow the procedure in Before working inside your computer.
2. Remove the stand.
3. Remove the back cover.
4. Remove the system-board shield.
About this task
The following image indicates the location of the coin-cell battery and provides a visual representation of the removal procedure.
Removing and installing Customer Replaceable Units (CRUs)
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