Lenovo ThinkCentre M75n, Hardware Maintenance Manual, Page: 88 / 120

5. Install the front Wi-Fi antenna and cable. Secure the front and rear Wi-Fi antenna cables with tapes.
6. Reinstall all parts that you have removed one by one in the reversed sequence as you remove them.
Then, reconnect the power adapter and all disconnected cables to the computer.
7. Turn over the computer so that the bottom cover is facing down.
Rear Wi-Fi antenna cable
Prerequisite
Before you start, read Chapter 1 “Important safety information” on page 1 and print the following
instructions.
Replacement procedure
1. Remove the rear Wi-Fi antenna. See “Rear Wi-Fi antenna” on page 68.
2. Turn over the computer so that the bottom cover is facing up.
3. Remove the bottom cover. See “Bottom cover” on page 69.
4. To get access to the rear Wi-Fi antenna cable, remove the following parts if any:
a. “Wi-Fi card” on page 71.
b. “M.2 solid-state drive” on page 72.
c. “Computer cover and rear I/O bracket” on page 73.
d. “Coin-cell battery” on page 75.
e. “System fan” on page 76.
f. “Internal speaker” on page 77.
g. “Heat sink” on page 78.
h. “System board” on page 79.
82
ThinkCentre M75nHardware Maintenance Manual