Lenovo ThinkCentre M725s Owner's manual

M725s User Guide and Hardware
Maintenance Manual
Energy Star Machine Types: 10VT, 10VU, 10VV, and 10VX

Note: Before using this infor ation and the product it supports, be sure to read and understand the
Important Product Information Guide and Appendix A “Notices” on page 63.
First Edition (July 2018)
Copyright Lenovo 2018.
LIMITED AND RESTRICTED RIGHTS NOTICE: If data or software is delivered pursuant to a General Services
Ad inistration “GSA” contract, use, reproduction, or disclosure is subject to restrictions set forth in Contract No. GS-
35F-05925.

Contents
Chapter 1. Overview . . . . . . . . . . . 1
Front view . . . . . . . . . . . . . . . . . . 1
Rear view . . . . . . . . . . . . . . . . . . 3
Syste board . . . . . . . . . . . . . . . . 5
Machine type and odel label . . . . . . . . . . 6
Chapter 2. Specifications . . . . . . . . 7
Chapter 3. Computer locks . . . . . . . 9
Chapter 4. Replacing hardware . . . . 11
Before replacing hardware . . . . . . . . . . 11
Knowing FRUs (including CRUs) . . . . . . . . 11
Locating FRUs (including CRUs) . . . . . . . . 12
Replacing external options . . . . . . . . . . 14
Re oving the co puter cover . . . . . . . . . 16
Replacing the front bezel . . . . . . . . . . . 17
Replacing the optical drive . . . . . . . . . . 18
Pivoting the drive bay asse bly upward and
downward . . . . . . . . . . . . . . . . . 20
Replacing the storage drive . . . . . . . . . . 22
Replacing the power button board and the card
reader . . . . . . . . . . . . . . . . . . 27
Replacing the illu inated red dot . . . . . . . . 31
Replacing the internal speaker . . . . . . . . . 33
Replacing the ther al sensor . . . . . . . . . 35
Replacing the Wi-Fi card . . . . . . . . . . . 38
Replacing the Wi-Fi antennas . . . . . . . . . 40
Replacing the M.2 solid-state drive . . . . . . . 42
Replacing the M.2 solid-state drive bracket . . . . 45
Replacing the coin-cell battery . . . . . . . . . 46
Replacing a e ory odule. . . . . . . . . . 48
Replacing the heat sink and fan asse bly . . . . 50
Replacing the icroprocessor . . . . . . . . . 52
Replacing a PCI Express card . . . . . . . . . 54
Replacing the cover presence switch . . . . . . 56
Replacing the power supply asse bly . . . . . . 57
Replacing the syste board . . . . . . . . . . 59
Co pleting the parts replace ent . . . . . . . 60
Appendix A. Notices . . . . . . . . . . 63
Appendix B. Trademarks . . . . . . . 65
© Copyright Lenovo 2018 i

ii M725s User Guide and Hardware Maintenance Manual

Chapter 1. Overview
This chapter provides basic infor ation to help you get fa iliar with your co puter.
Front view
Note: Your co puter odel ight look slightly different fro the illustration.
Figure 1. Front view
1 Optical drive eject button 2 Optical drive activity indicator
3 Storage drive activity indicator 4 Card reader slot (optional)
5 Power button 6 Power indicator
7 Microphone connector 8 Headphone connector
9 USB 3.1 Gen 2 connectors (2) 10 USB 3.1 Gen 1 connectors (2)
11 Illu inated red dot 12 Internal speaker (optional)
1 Optical drive eject button
Used to eject the tray of the optical drive.
© Copyright Lenovo 2018 1