8 Remove USB-dongle port.
9 Remove the Diagnostic light button board.
Installing I/O panel
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.
8 Install the:
a inner frame
b stand
c system-board shield
d back cover
e USB dongle-bay cover
9 Follow the procedure in After working inside your computer
Removing and installing components
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