Removing the I/O Panel is fairly easy. The steps below will outline the process of replacing the I/O panel for your case.

1. Power off your PC and unplug the power cable from the wall. Flip the switch on the PSU to off.
2. Remove the left glass side panel for the case so you can access the inside of the case.
3. Unplug all of the I/O panel cables from the Motherboard.
4. Remove these two screws.
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5. Once these screws are removed, the I/O panel will be loose and removable. This is what the I/O panel looks like from the top of the case.
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6. Now that the screws have been removed, the I/O panel can be removed.
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7. Slowly remove the I/O panel along with the attached cables that were unplugged in step #3, to avoid pulling/damaging any cables in the process
8. Installing the new I/O panel is the same process in reverse. Feed the cables of the new I/O panel through the opening.
9. Screw in the 2 screws from the inside of the case to fasten the I/O panel down.
10. Reconnect all of the I/O panel cables back to the Motherboard.
11. Put the glass side panel back on, reconnect the power cable for the PSU to the wall and power the PC back on.