Replacing the I/O panel
WARNING: Before working inside your computer, read the safety 
information that shipped with your computer and follow the steps in Before 
working inside your computer. After working inside your computer, follow 
the instructions in After working inside your computer. For more safety best 
practices, see the Regulatory Compliance home page at 
www.dell.com/
regulatory_compliance.
 
Procedure
1  Replace the Diagnostic light button board.
2  Replace USB-dongle port.
3  Connect the USB-dongle cable to the system board.
4  Align the screw holes on the I/O-board panel with the screw holes on the middle 
frame.
5  Replace the four screws (M3X4) that secure the I/O panel to the middle frame 
and system board.
6  Connect the diagnostic button and light cable.
7  Connect the power-button cable.
Post-requisites
1  Replace the inner frame.
2  Replace the system-board shield.
3  Replace the stand.
4  Replace the back cover.
5  Replace the USB dongle-bay cover.
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