Service Manual

11. Using the alignment pins, connect the right I/O-board cable to the right I/O-board and the system board.
NOTE: The I/O-board cable is polarity sensitive. To prevent damage to your computer ensure that the MB UMT end of the
cable is connected to the system board.
12. Replace the two screws (M2x3) that secure the right I/O-board cable to the right I/O-board and the system board.
13. Using the tab on the solid-state drive support bracket and the slot on the system board, align the screw hole of the solid-state
drive support bracket with the screw hole on the system board.
14. Replace the three screws (M2x4.5) that secure the solid-state drive support bracket to the system board.
15.Connect the keyboard-controller board-cable to the system board and close the latch.
16.Connect the touchpad cable to the system board and close the latch.
17. Connect the power-button cable to the system board.
18.Route the antenna cables to the routing guides on the left fan and system board.
19.Adhere the tapes that secure the antenna cables to system board and left fan.
20.Connect the antenna cables to the wireless card.
The following table provides the antenna-cable color scheme for the wireless card that is supported by your computer.
Table 3. Antenna-cable color scheme
Connectors on the wireless card Antenna-cable color
Main (white triangle) White or Grey
Auxiliary (black triangle) Black or Orange
21. Place the wireless card bracket on the wireless card.
22.Replace the screw (M2x3) that secures the wireless card bracket to the left I/O-board.
Next steps
1. Install the
battery.
2. Install the rear I/O-cover.
3. Install the 2280 solid-state drive in M.2 slot two, if installed.
4. Install the 2230 solid-state drive in M.2 slot two, if installed.
5. Install the
2280 solid-state drive in M.2 slot one, if installed.
6. Install the 2230 solid-state drive in M.2 slot one, if installed.
7. Install the base cover.
8. Follow the procedure in After working inside your computer.
Left I/O-board
Removing the left I/O-board
Prerequisites
1. Follow the procedure in Before working inside your computer.
2. Remove the base cover.
3. Remove the
2230 solid-state drive in M.2 slot one, if installed.
4. Remove the 2280 solid-state drive in M.2 slot one, if installed.
5. Remove the 2230 solid-state drive in M.2 slot two, if installed.
6. Remove the 2280 solid-state drive in M.2 slot two, if installed.
7. Remove the rear I/O-cover.
8. Remove the battery.
9. Follow step 1 to step 21 in removing the system board.
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