Lenovo 10ST007EUK User Manual
ThinkCentre M720s User Guide and Hardware
Maintenance Manual
Energy Star Machine Types: 10ST, 10SU, 10SV, 10TR, 10U6, and
10U7
Note: Before using this information and the product it supports, be sure to read and understand the
Important Product Information Guide and Appendix A “Notices” on page 71.
First Edition (June 2018)
© Copyright Lenovo 2018.
LIMITED AND RESTRICTED RIGHTS NOTICE: If data or software is delivered pursuant to a General Services
Administration “GSA” contract, use, reproduction, or disclosure is subject to restrictions set forth in Contract No. GS35F-05925.
Contents
Chapter 1. Overview. . . . . . . . . . . 1
Front view . . . . . . . . . . . . . . . . . . 1
Rear view . . . . . . . . . . . . . . . . . . 3
System board . . . . . . . . . . . . . . . . 5
Machine type and model label . . . . . . . . . . 7
Chapter 2. Specifications . . . . . . . . 9
Chapter 3. Computer locks . . . . . . 11
Locking the computer cover . . . . . . . . . . 11
Enabling or disabling the E-lock . . . . . . . . 11
Attaching a Kensington-style cable lock . . . . . 12
Attaching a smart cable clip . . . . . . . . . . 12
Chapter 4. Replacing hardware . . . . 15
Before replacing hardware . . . . . . . . . . 15
Knowing FRUs (including CRUs) . . . . . . . . 15
Locating FRUs (including CRUs) . . . . . . . . 16
Replacing the keyboard or wireless keyboard . . . 18
Replacing the mouse or wireless mouse . . . . . 19
Replacing the power cord . . . . . . . . . . . 21
Replacing the dust shield . . . . . . . . . . . 22
Replacing the vertical stand . . . . . . . . . . 23
Removing the computer cover . . . . . . . . . 24
Replacing the front bezel . . . . . . . . . . . 25
Replacing the optical drive . . . . . . . . . . 25
Replacing the storage drive . . . . . . . . . . 27
Replacing a memory module. . . . . . . . . . 33
Replacing a PCI Express card . . . . . . . . . 35
Replacing the Wi-Fi card . . . . . . . . . . . 37
Replacing the M.2 solid-state drive . . . . . . . 39
Replacing the M.2 solid-state drive bracket . . . . 46
Replacing the power supply assembly . . . . . . 46
Replacing the Wi-Fi antennas . . . . . . . . . 48
Replacing the internal speaker . . . . . . . . . 50
Replacing the illuminated red dot cable . . . . . 52
Replacing the thermal sensor . . . . . . . . . 54
Replacing the front I/O bracket . . . . . . . . . 56
Replacing the power button . . . . . . . . . . 57
Replacing the card reader board . . . . . . . . 58
Replacing the heat sink and fan assembly . . . . 59
Replacing the microprocessor . . . . . . . . . 61
Replacing the coin-cell battery . . . . . . . . . 63
Replacing the E-lock . . . . . . . . . . . . . 65
Replacing the cover presence switch . . . . . . 66
Replacing the system board and chassis . . . . . 67
Completing the parts replacement . . . . . . . 68
Appendix A. Notices. . . . . . . . . . 71
Appendix B. Trademarks . . . . . . . 73
© Copyright Lenovo 2018 i
ii ThinkCentre M720s User Guide and Hardware Maintenance Manual
Chapter 1. Overview
This chapter provides basic information to help you get familiar with your computer.
Front view
Note: Your computer model might look slightly different from the illustration.
Figure 1. Front view
© Copyright Lenovo 2018 1
1 Optical drive eject/close button (optional) 2 Optical drive activity indicator (optional)
3 Storage drive activity indicator 4 Card reader slot (optional)
5 Power button 6 Power indicator
7 Microphone connector (optional)
9 Type-C USB 3.1 Gen 1 connector 10 USB 3.1 Gen 1 connectors (2)
11 USB 3.1 Gen 2 connectors (2)
13 Internal speaker
1 Optical drive eject/close button (optional)
8 Headset connector
12 Illuminated red dot
Used to eject the tray of the optical drive. After you insert a disc into the tray, press the eject/close button to
close the tray.
2 Optical drive activity indicator (optional)
This indicator is on when the optical drive is in use.
3 Storage drive activity indicator
This indicator is on when the storage drive is in use.
4 Card reader slot (optional)
Used to read data from a supported memory card.
5 Power button
Used to turn on your computer. When you cannot shut down the computer from the operating system, press
and hold the power button for four or more seconds to turn off the computer.
6 Power indicator
This indicator is on when the computer is on.
7 Microphone connector
Used to connect a microphone to your computer. You can use the microphone to record sounds or interact
with the computer using speech-recognition software.
8 Headset connector
Used to connect a headset or headphones to your computer.
9 Type-C USB 3.1 Gen 1 connector
Used to connect a Type-C USB 3.1 compatible device.
10 USB 3.1 Gen 1 connectors
Used to connect a USB-compatible device. For optimal data transfer, connect a USB 3.1 Gen 1 device to a
USB 3.1 Gen 2 or USB 3.1 Gen 1 connector instead of a USB 2.0 connector.
11 USB 3.1 Gen 2 connectors
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ThinkCentre M720s User Guide and Hardware Maintenance Manual
Used to connect a USB-compatible device. For optimal data transfer, connect a USB 3.1 Gen 2 device to a
USB 3.1 Gen 2 connector instead of a USB 3.1 Gen 1 or USB 2.0 connector.
12 Illuminated red dot
This indicator is on when the computer is on.
13 Internal speaker
Used to listen to the sounds from your computer without using a headset or headphones.
Rear view
Note: Your computer model might look slightly different from the illustration.
Figure 2. Rear view
Chapter 1. Overview 3
1 Audio line-out connector
3 DisplayPort
5 USB 2.0 connectors (3) 6 Serial connector
®
1.2 out connectors (2) 4 USB 2.0 connector
2 VGA-out connector
7 PS/2 keyboard and mouse connectors (optional)
9 Security-lock slot
11 PCI Express card area 12 Smart cable clip slots (2) (optional)
13 Power cord connector
1 Audio line-out connector
8 Ethernet connector
10 Padlock loop
Used to send audio signals from the computer to external devices, such as powered stereo speakers,
headphones, or multimedia keyboards. To connect a stereo system or other external recording device,
connect a cable between the audio line-in connector of the device and the audio line-out connector of the
computer.
Note: If your computer has both an audio line-out connector and a headset or headphone connector, always
use the headset or headphone connector for earphones, headphones, or a headset. The headphone
connector does not support headset microphones.
2 VGA-out connector
Used to send video signals from the computer to another video device, such as a monitor.
3 DisplayPort 1.2 out connectors
Used to send audio and video signals from the computer to another audio or video device, such as a highperformance monitor.
4 USB 2.0 connector
Used to connect a device that requires a USB 2.0 connection.
Note: The USB 2.0 connector supports the smart power on feature. If you connect a Lenovo-recommended
USB 1.1 keyboard to this connector, you can power on the computer or wake it up from S4 hibernation mode
by pressing Alt+P on the keyboard. Ensure that you use a Lenovo-recommended keyboard that supports the
smart power on feature.
5 USB 2.0 connectors
Used to connect a device that requires a USB 2.0 connection.
6 Serial connector
Used to connect an external modem, a serial printer, or other devices that use a serial connector.
7 PS/2 keyboard and mouse connectors (optional)
Used to connect a keyboard, a mouse, or trackball, or other pointing devices that uses a Personal System/2
(PS/2) connector.
8 Ethernet connector
Used to connect an Ethernet cable for network access.
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ThinkCentre M720s User Guide and Hardware Maintenance Manual
9 Security-lock slot
Used to secure a Kensington-style cable lock.
10 Padlock loop
Used to secure a padlock.
11 PCI Express card area
To improve the operating performance of the computer, you can connect PCI Express cards into this area.
Depending on the computer model, the connectors in this area vary.
12 Smart cable clip slots (optional)
Used to secure a smart cable clip.
13 Power cord connector
Used to connect the power cord to your computer for power supply.
System board
Note: See “Front view” and “Rear view” for additional component descriptions.
Chapter 1. Overview 5
Figure 3. System board
1 4-pin power connector
3 Power button connector 4 Internal speaker connector
5 Auxiliary fan connector 2
7 Auxiliary fan connector 1
9 Clear CMOS (Complementary Metal Oxide
2 Microprocessor fan connector
6 10-pin power connector
8 SATA power connectors (2)
10 SATA 3.0 connectors (3)
Semiconductor) / Recovery jumper
11 M.2 solid-state drive slot 12 M.2 Wi-Fi card slot
13 Thermal sensor connector 14 Illuminated red dot connector
15 Front USB 2.0 connector
17 Serial (COM2) connector 18 PCI Express x1 card slots (2)
19 PCI Express x16 graphics card slot 20 System fan connector
21 E-lock connector 22 Microprocessor socket
23 Cover presence switch connector (Intrusion switch
16 Parallel connector
24 Coin-cell battery
connector)
25 Memory slot (DIMM1) 26 Memory slot (DIMM2)
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27 Memory slot (DIMM3) 28 Memory slot (DIMM4)
29 Keyboard and mouse connector
Machine type and model label
The machine type and model label identifies the computer. When you contact Lenovo for help, the machine
type and model information helps support technicians to identify the computer and provide faster service.
The machine type and model label is attached on the computer as shown.
Figure 4. Machine type and model label
Chapter 1. Overview 7
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Chapter 2. Specifications
Power supply
• 180-watt automatic voltage-sensing power supply
• 210-watt automatic voltage-sensing power supply
• 260-watt automatic voltage-sensing power supply
Storage drives
• 3.5–inch storage drive (optional)
• 2.5–inch storage drive (optional)
• M.2 solid-state drive (optional)
Video features
The integrated graphics card supports the following:
• DisplayPort 1.2 out connector
• VGA-out connector
Audio features
• The integrated audio card supports the following:
– Audio line-out connector
– Headset connector
– Internal speaker
– Microphone connector (optional)
• The optional discrete audio card provides an enhanced audio experience and extended capabilities.
Input/Output (I/O) features
• Audio connectors (audio line-out, headset, and microphone)
• Card reader slot (optional)
• VGA-out connector
• Ethernet connector
• PS/2 keyboard connector (optional)
• PS/2 mouse connector (optional)
• Serial connectors
• USB connectors (USB 2.0, USB 3.1, and Type-C USB 3.1)
• VGA-out connector
Expansion
• Card reader (optional)
• Memory slots
• M.2 solid-state drive slot
• Optical drive (optional)
• PCI Express x1 card slots
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• PCI Express x16 graphics card slot
• Storage drive bay
Network features
• Ethernet LAN
• Wireless LAN (optional)
• Bluetooth (optional)
Physical dimensions
• Width: 92.5 mm (3.6 inches)
• Height: 343.5 mm (13.5 inches)
• Depth: 290.5 mm (11.4 inches)
Weight (without the package)
Maximum configuration as shipped: 6 kg (13.2 lb)
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ThinkCentre M720s User Guide and Hardware Maintenance Manual
Chapter 3. Computer locks
This chapter provides instructions on how to lock your computer with the locking devices to keep your
computer safe.
Locking the computer cover
Locking the computer cover helps prevent unauthorized access to the inside of your computer. Your
computer features a padlock loop so that the computer cover cannot be removed when a padlock is
installed.
Figure 5. Locking the computer cover
Enabling or disabling the E-lock
Your computer may have a security lock solution installed to protect the computer from unauthorized
tampering of the internal components. Using the E-Lock, you can mechanically lock or unlock the computer
cover.
To enable or disable the E-Lock, do the following:
1. Turn on or restart the computer.
2. Before Windows starts up, repeatedly press and release the F1 or Fn+F1 key until the Setup Utility
program opens.
3. Click Security ➙ Electronic Lock to enable or disable the E-lock.
4. Press F10 or Fn+F10 to save the changes and reboot the computer.
Note: Changes do not take effect until the setting is saved and the system is rebooted.
© Copyright Lenovo 2018 11
Figure 6. Enabling or disabling the E-lock
Attaching a Kensington-style cable lock
You can use a Kensington-style cable lock to secure your computer to a desk, table, or other nonpermanent
fixture. The cable lock connects to the security-lock slot at the rear of your computer. Depending on the type
selected, the cable lock can be operated with a key or combination. The cable lock also locks the buttons
used to open the computer cover. This is the same type of lock used with many notebook computers. You
can order such a cable lock directly from Lenovo by searching for Kensington at:
http://www.lenovo.com/support
Figure 7. Attaching a Kensington-style cable lock
Attaching a smart cable clip
A smart cable clip can be used to secure devices, such as the keyboard and the mouse, by locking the
device cables to the computer. The smart cable clip connects to the cable-lock slots on the rear of the
computer. To install a smart cable clip, do the following:
1. Insert the clip
2. Pull the cables you want to lock through the dents in the smart cable clip.
3. Press the clip
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ThinkCentre M720s User Guide and Hardware Maintenance Manual
1 into the cable-lock slot 4 .
2 into the cable-lock slot 3 until it snaps into position.
Figure 8. Attaching a smart cable clip
Chapter 3. Computer locks 13
14 ThinkCentre M720s User Guide and Hardware Maintenance Manual
Chapter 4. Replacing hardware
This chapter provides instructions on how to replace hardware for your computer.
Before replacing hardware
Attention: Do not open your computer or attempt any repairs before reading this section and the Important
Product Information Guide.
Notes before replacing hardware
• Use computer components provided only by Lenovo.
• When installing or replacing an option, use the appropriate instructions explained in this manual along with
the instructions that come with the option.
• In most areas of the world, Lenovo requires the return of defective CRUs. Information about this will come
with the CRU or will come a few days after the CRU arrives.
Handling static-sensitive devices
Do not open the static-protective package containing the new part until the defective part has been removed
and you are ready to install the new part. Static electricity, although harmless to you, can seriously damage
computer components and options.
When you handle options and other computer components, take these precautions to avoid static-electricity
damage:
• Limit your movement. Movement can cause static electricity to build up around you.
• Always handle options and other computer components carefully. Handle PCI/PCIe cards, memory
modules, system boards, and microprocessors by the edges. Never touch any exposed circuitry.
• Prevent others from touching the options and other computer components.
• Touch the static-protective package containing the part to a metal expansion-slot cover or other
unpainted metal surface on the computer for at least two seconds. This reduces static electricity from the
package and your body before you install or replace a new part.
• When possible, remove the new part from the static-protective package, and install it directly in the
computer without setting the part down. When this is not possible, place the static-protective package on
a smooth, level surface and place the part on the package.
• Do not place the part on the computer cover or other metal surface.
Knowing FRUs (including CRUs)
• Field Replaceable Units (FRUs) are computer parts that a trained technician can upgrade or replace. FRUs
include all CRUs. For detailed FRU information, such as the FRU part numbers and supported computer
models, go to:
http://www.lenovo.com/serviceparts-lookup
• Customer Replaceable Units (CRUs) are computer parts that a user can upgrade or replace.
– Self-service CRUs: You can install self-service CRUs easily. These CRUs might be stand-alone,
latched, or secured by up to two screws. Examples of self-service CRUs include the keyboard, mouse,
and any USB device. You are responsible for replacing all self-service CRUs.
– Optional-service CRUs: Handling optional-service CRUs requires some technical skills and simple tools
(such as a screwdriver). These CRUs are isolated parts within the computer. They are usually
© Copyright Lenovo 2018 15
concealed by an access panel that is secured by more than two screws. You must remove the screws
and panel to access the specific CRU. Optional-service CRUs can be removed and installed by users
or, during the warranty period, by a Lenovo service technician.
Before replacing FRUs
Before replacing any FRU, read the following:
• Only certified and trained personnel can service the computer.
• Before replacing an FRU, read the entire section about replacing the part.
• Be extremely careful during writing operations such as copying, saving, or formatting.
The sequence of the drives in the computer that you are servicing might have been altered. If you select
an incorrect drive, data or programs might be overwritten.
• Replace an FRU only with another FRU of the correct model.
When you replace an FRU, ensure that the model of the machine and the FRU part number are correct.
• An FRU should not be replaced because of a single, unreproducible failure.
Single failures can occur for a variety of reasons that have nothing to do with a hardware defect, such as
cosmic radiation, electrostatic discharge, or software errors. Consider replacing an FRU only when a
problem recurs. If you suspect that an FRU is defective, clear the error log and run the test again. If the
error does not recur, do not replace the FRU.
• Only replace a defective FRU.
Locating FRUs (including CRUs)
Notes:
• Some of the components are optional.
• To replace a component that is not in the list below, contact a Lenovo service technician. For a list of
Lenovo Support phone numbers, go to:
http://www.lenovo.com/support/phone
16 ThinkCentre M720s User Guide and Hardware Maintenance Manual
Figure 9. Locating FRUs
Self-service CRUs Optional-service CRUs Non-CRUs
1 Computer cover
2 PCI Express card
6 Memory module 36 Power supply assembly
8 M.2 solid-state drive heat sink 37 E-lock
9 M.2 solid-state drive 15 Power button
10 Wi-Fi card
11 Wi-Fi card shield 4 Microprocessor
3 Heat sink and fan assembly
5 System board
7 Coin-cell battery
Chapter 4. Replacing hardware 17
Self-service CRUs Optional-service CRUs Non-CRUs
12 M.2 solid-state drive bracket
13 Optical drive bracket 17 Storage drive cable
14 Optical drive 18 Card reader
23 Front bezel
24 Dust shield 20 Internal speaker
25 Keyboard 21 Thermal sensor
26 Mouse 22 Illuminated red dot cable
27 Vertical stand
28 Power cord
16 Front I/O bracket
19 Optical drive cable
35 Chassis
38 Cover presence switch (intrusion
switch)
29 Secondary storage drive
30 Secondary storage drive bezel
31 Secondary storage drive bracket
32 Primary storage drive
33 Storage converter
34 Primary storage drive bracket
39 Wi-Fi antennas
Replacing the keyboard or wireless keyboard
Note: The wireless keyboard is available only on some models.
Replacing the keyboard
1. Turn off the computer and disconnect all power cords from electrical outlets.
2. Disconnect the old keyboard cable from the computer.
3. Connect a new keyboard to the appropriate connector on the computer.
Figure 10. Replacing the keyboard
Replacing the wireless keyboard
1. Disconnect the USB dongle from your computer and remove your old wireless keyboard.
2. Take out the new wireless keyboard from the package.
3. Open the battery compartment cover, and install two AAA batteries according to the polarity indicators.
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ThinkCentre M720s User Guide and Hardware Maintenance Manual
Figure 11. Replacing the wireless keyboard
4. Take out the USB dongle from the keyboard compartment or from the wireless mouse compartment and
connect it to an available USB connector on the computer.
5. Close the compartment cover. The keyboard is ready for use.
Replacing the mouse or wireless mouse
Note: The wireless mouse is available only on some models.
Replacing the mouse
1. Turn off the computer and disconnect all power cords from electrical outlets.
2. Disconnect the old mouse cable from the computer.
3. Connect a new mouse to the appropriate connector on the computer.
Figure 12. Replacing the mouse
Replacing the wireless mouse
1. Disconnect the USB dongle from your computer. Then, remove your old wireless mouse.
2. Take out the new wireless mouse from the package.
3. Open the battery compartment cover, and install two AAA batteries according to the polarity indicators.
Chapter 4. Replacing hardware 19
Figure 13. Opening the battery compartment
Figure 14. Taking out the USB dongle
Figure 15. Connecting the USB dongle to a USB connector
Figure 16. Installing the mouse batteries
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