Replacing the i/o panel – Dell OptiPlex 755 User Manual
Page 168
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9.
Remove cables from the system board.
10.
From inside the computer cover, remove the mounting screw that secures the I/O panel to the computer.
11.
Ease the I/O panel back and forth to release its circular tabs from the two holes in the chassis that secure it.
12.
Remove the I/O panel from the computer.
Replacing the I/O Panel
To replace the I/O panel, follow the removal procedures in the reverse order.
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NOTE:
Use the guides on the I/O panel bracket to help position the I/O panel in place and use the notch on the I/O panel bracket to help seat the card.
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