Lenovo ThinkCentre M720q Owner's manual

M720q User Guide and Hardware
Maintenance Manual
Energy Star Machine Types: 10T7, 10T8, 10T9, 10TA, 10TC, 10U8,
10U9, and 10UA

Note: Before usin this information and the product it supports, be sure to read and understand the
Important Product Information Guide and Appendix A “Notices” on pa e 59.
Second Edition (June 2018)
© Copyright enovo 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. GS-
35F-05925.

Contents
Chapter 1. Overview . . . . . . . . . . . 1
Front view . . . . . . . . . . . . . . . . . . 1
Rear view . . . . . . . . . . . . . . . . . . 2
System board . . . . . . . . . . . . . . . . 4
Machine type and model label . . . . . . . . . . 6
Chapter 2. Specifications . . . . . . . . 7
Chapter 3. Tips on using the
computer . . . . . . . . . . . . . . . . . 9
Attachin a Kensin ton-style cable lock . . . . . . 9
Installin the computer into the TIO monitor . . . . . 9
Chapter 4. Replacing hardware . . . . 11
Before replacin hardware . . . . . . . . . . 11
Knowin FRUs (includin CRUs) . . . . . . . . 11
Locatin FRUs (includin CRUs) . . . . . . . . 12
Replacin the keyboard or wireless keyboard . . . 14
Replacin the mouse or wireless mouse . . . . . 15
Replacin the power adapter . . . . . . . . . 19
Replacin the vertical stand . . . . . . . . . . 20
Replacin the VESA mount bracket . . . . . . . 21
Replacin the external optical drive . . . . . . . 22
Replacin the power adapter bracket . . . . . . 24
Removin the computer cover . . . . . . . . . 25
Replacin the stora e drive . . . . . . . . . . 26
Replacin the stora e drive cable . . . . . . . . 29
Replacin the PCI Express card and PCI Express
card adapter . . . . . . . . . . . . . . . . 29
Replacin the internal speaker . . . . . . . . . 31
Replacin the advanced speaker . . . . . . . . 32
Replacin the system fan . . . . . . . . . . . 33
Replacin the heat sink . . . . . . . . . . . . 34
Replacin the coin-cell battery . . . . . . . . . 35
Replacin the microprocessor . . . . . . . . . 37
Replacin the Wi-Fi card . . . . . . . . . . . 40
Replacin the Wi-Fi antennas . . . . . . . . . 44
Replacin the antenna bracket . . . . . . . . . 49
Replacin the bottom cover . . . . . . . . . . 49
Replacin the memory module . . . . . . . . . 50
Replacin the M.2 solid-state drive . . . . . . . 52
Replacin the system board and chassis . . . . . 54
Completin the parts replacement . . . . . . . 56
Appendix A. Notices . . . . . . . . . . 59
Appendix B. Trademarks . . . . . . . 61
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ii M720q User Guide and Hardware Maintenance Manual

Chapter 1. Overview
This chapter provides basic information to help you et familiar with your computer.
Front view
Note: Your computer model mi ht look sli htly different from the illustration.
Figure 1. Front view
1 Power indicator 2 Power button
3 Stora e drive status indicator 4 Microphone connector
5 Headset connector 6 Type-C USB 3.1 Gen 1 connector
7 Always On USB 3.1 Gen 1 connector 8 Illuminated red dot
1 Power indicator
This indicator is on when the computer is on.
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2 Power button
Used to turn on your computer. When you cannot shut down the computer from the operatin system, press
and hold the power button for four or more seconds to turn off the computer.
3 Storage drive status indicator
This indicator is on when the stora e drive is in use.
4 Microphone connector
Used to connect a microphone to your computer. You can use the microphone to record sounds or interact
with the computer usin speech-reco nition software.
5 Headset connector
Used to connect a headset or headphones to your computer.
6 Type-C USB 3.1 Gen 1 connector
Used to connect a Type-C USB 3.1 compatible device.
7 Always On USB 3.1 Gen 1 connector
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.
8 Illuminated red dot
This indicator is on when the computer is on.
Rear view
Note: Your computer model mi ht look sli htly different from the illustration.
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Figure 2. Rear view
1 Optional connector 2 2 Optional connector 1
3 Security-lock slot 4 Wi-Fi antenna slot
5 Ethernet connector 6 USB 3.1 Gen 2 connectors (2)
7 USB 3.1 Gen 1 connector 8 HDMI™ 1.4 out connector
9 USB 3.1 Gen 1 connector 10 DisplayPort® 1.2 out connector
11 Power adapter connector
1 Optional connector 2
Dependin on the computer model, the connector mi ht vary.
2 Optional connector 1
Dependin on the computer model, the connector mi ht vary.
3 Security-lock slot
Used to secure a Kensin ton-style cable lock.
4 Wi-Fi antenna slot
Chapter 1.Overview 3

Used to install the rear Wi-Fi antenna cable connector that is available only on some models. The rear Wi-Fi
antenna is installed on the rear Wi-Fi antenna cable connector.
5 Ethernet connector
Used to connect an Ethernet cable for network access.
6 USB 3.1 Gen 2 connectors
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.
7 USB 3.1 Gen 1 connector
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.
8 HDMI 1.4 out connector
Used to send video and audio si nals from your computer to another audio or video device, such as a hi h
performance monitor.
9 USB 3.1 Gen 1 connector
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.
10 DisplayPort 1.2 out connector
Used to send audio and video si nals from the computer to another audio or video device, such as a hi h-
performance monitor.
11 Power adapter connector
Used to connect the power adapter to your computer for power supply.
System board
Note: See “Front view” and “Rear view” for additional component descriptions.
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Figure 3. System board
1 Clear CMOS (Complementary Metal Oxide
Semiconductor) / Recovery jumper
2 Thunderbolt connector
3 Board to board connector 4 DC connector
5 Microprocessor 6 Coin-cell battery
7 Internal speaker or advanced speaker connector 8 System fan connector
9 Stora e drive slot 10 M.2 Wi-Fi card slot
Chapter 1.Overview 5

11 PCI Express card slot 12 Serial connector
13 Memory slot 1 (DIMM1) 14 Memory slot 2 (DIMM2)
15 M.2 solid-state drive slot
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. achine type and model label
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Chapter 2. Specifications
Power supply
• 65-watt automatic volta e-sensin power supply (optional)
• 90-watt automatic volta e-sensin power supply (optional)
• 135-watt automatic volta e-sensin power supply (optional)
Storage drives
• 2.5-inch stora e drive (optional)
• M.2 solid-state drive (optional)
Video features
• The inte rated raphics card supports the followin :
– DisplayPort 1.2 out connector
– HDMI 1.4 out connector
Audio features
• The inte rated audio card supports the followin :
– Advanced speaker (optional)
– Headset connector
– Internal speaker (optional)
– Microphone connector
Input/Output (I/O) features
• Audio connectors (headset and microphone)
• DisplayPort 1.2 out connector
• Ethernet connector
• HDMI 1.4 out connector
• Serial connector (optional)
• Type-C USB connector
• USB connector
Expansion
• External optical drive box (optional)
• Memory slots
• M.2 solid-state drive slot
• PCI Express raphics card slot
Network features
• Ethernet LAN
• Wireless LAN (optional)
• Bluetooth (optional)
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Physical dimensions
• Width: 37 mm (1.5 inches)
• Hei ht: 179 mm (7.0 inches)
• Depth: 183 mm (7.2 inches)
Weight (without the package)
Maximum confi uration as shipped: 1.3 k (2.9 lb)
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Chapter 3. Tips on using the computer
This chapter provides tips on usin the computer.
Attaching a Kensington-style cable lock
You can use a Kensin ton-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. Dependin 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 searchin for Kensington at:
http://www.lenovo.com/support
Figure 5. Attaching a Kensington-style cable lock
Installing the computer into the TIO monitor
1. For the Tiny-in-One 23 monitor (MT: 10DQ), remove the rear Wi-Fi antenna cover before installin the
computer. See “Replacin the Wi-Fi antennas” on pa e 44.
2. Connect the computer either to the power adapter shipped with the TIO monitor or to the adapter
shipped with the computer that has hi her power ratin .
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10 M720q 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 readin this section and the Important
Product Information Guide.
Notes before replacing hardware
• Use computer components provided only by Lenovo.
• When installin or replacin an option, use the appropriate instructions explained in this manual alon 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 packa e containin the new part until the defective part has been removed
and you are ready to install the new part. Static electricity, althou h harmless to you, can seriously dama e
computer components and options.
When you handle options and other computer components, take these precautions to avoid static-electricity
dama e:
• 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 ed es. Never touch any exposed circuitry.
• Prevent others from touchin the options and other computer components.
• Touch the static-protective packa e containin 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
packa e and your body before you install or replace a new part.
• When possible, remove the new part from the static-protective packa e, and install it directly in the
computer without settin the part down. When this is not possible, place the static-protective packa e on
a smooth, level surface and place the part on the packa e.
• 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 up rade or replace. FRUs
include all CRUs. For detailed FRU information, such as the FRU part numbers and supported computer
models, o to:
http://www.lenovo.com/serviceparts-lookup
• Customer Replaceable Units (CRUs) are computer parts that a user can up rade or replace.
– Self-service CRUs: You can install self-service CRUs easily. These CRUs mi ht be stand-alone,
latched, or secured by up to two screws. Examples of self-service CRUs include the keyboard, mouse,
any USB device. You are responsible for replacin all self-service CRUs.
– Optional-service CRUs: Handlin 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
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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, durin the warranty period, by a Lenovo service technician.
Before replacing FRUs
Before replacin any FRU, read the followin :
• Only certified and trained personnel can service the computer.
• Before replacin an FRU, read the entire section about replacin the part.
• Be extremely careful durin writin operations such as copyin , savin , or formattin .
The sequence of the drives in the computer that you are servicin mi ht have been altered. If you select
an incorrect drive, data or pro rams mi ht 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 sin le, unreproducible failure.
Sin le failures can occur for a variety of reasons that have nothin to do with a hardware defect, such as
cosmic radiation, electrostatic dischar e, or software errors. Consider replacin an FRU only when a
problem recurs. If you suspect that an FRU is defective, clear the error lo and run the test a ain. If the
error does not recur, do not replace the FRU.
• Only replace a defective FRU.
ocating 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, o to:
http://www.lenovo.com/serviceparts-lookup
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Figure 6. Locating FRUs (including CRUs)
Self-service CRUs Optional-service CRUs Non-CRUs
1 Vertical stand 8 Coin-cell battery 7 Microprocessor
2 Power adapter bracket 12 System fan 10 Advanced speaker
3 Power adapter 19 Stora e drive 11 Antenna bracket
4 Power cord 20 Stora e drive bracket 13 System board
5 Computer cover 21 Wi-Fi card shield 14 Chassis
6 Dust shield 22 Wi-Fi card 18 Stora e drive cable
9 Internal speaker 23 PCI Express card 25 Wi-Fi antennas
15 Bottom cover 24 PCI Express card adapter 26 Heat sink
Chapter 4.Replacin hardware 13

Self-service CRUs Optional-service CRUs Non-CRUs
16 Memory module
17 M.2 solid-state drive
27 VESA® mount bracket
28 External optical drive
29 External optical drive box
30 Keyboard
31 Mouse
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 7. Replacing the keyboard
Replacing the wireless keyboard
1. Remove your old wireless keyboard.
2. Take out the new wireless keyboard from the packa e.
3. Open the battery compartment cover, and install two AAA batteries accordin to the polarity indicators.
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Figure 8. Replacing the wireless keyboard
4. Remove the USB don le 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 9. Replacing the mouse
Replacing the wireless mouse
1. Disconnect the USB don le from your computer. Then, remove your old wireless mouse.
2. Remove the new wireless mouse from the packa e.
3. Open the battery compartment cover, and install two AAA batteries accordin to the polarity indicators.
Chapter 4.Replacin hardware 15

Figure 10. Opening the battery compartment
Figure 11. Taking out the USB dongle
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