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3. Replace the rear fan.

Figure 131. Removing the rear fan

Figure 132. Installing the rear fan

4. Connect the rear fan cable to the system board.

5. Complete the replacement. See “Completing the parts replacement” on page 74.

Replacing the system board

Attention:

Do not open your computer or attempt any repairs before reading the

Important Product

Information Guide

1. Remove the computer cover. See “Removing the computer cover” on page 23.

2. Remove the front bezel. See “Replacing the front bezel” on page 23.

3. Remove the front I/O bracket. See “Replacing the front I/O bracket” on page 58.

4. Remove all memory modules. See “Replacing a memory module” on page 31.

5. Remove the heat sink and fan assembly. See “Replacing the heat sink and fan assembly” on page 62.

6. Remove the microprocessor. See “Replacing the microprocessor” on page 64.

7. Remove all PCI Express cards. See “Replacing a PCI Express card” on page 34.

8. Remove the Wi-Fi card. See “Replacing the Wi-Fi card” on page 36.

9. Remove the M.2 solid-state drive. See “Replacing the M.2 solid-state drive” on page 38.

Chapter 4

Replacing hardware

Содержание ThinkCentre M720t

Страница 1: ...ThinkCentre M720t User Guide and Hardware Maintenance Manual Energy Star Machine Types 10SQ 10SR 10SS 10TQ 10U4 and 10U5 ...

Страница 2: ...formation Guide and Appendix A Notices on page 77 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 GS 35F 05925 ...

Страница 3: ...tical drive bracket 25 Replacing the storage drive 26 Replacing a memory module 31 Replacing a PCI Express card 34 Replacing the Wi Fi card 36 Replacing the M 2 solid state drive 38 Replacing the M 2 solid state drive bracket 45 Replacing the power supply assembly 46 Replacing the Wi Fi antennas 48 Replacing the internal speaker 51 Replacing the front fan 53 Replacing the illuminated red dot cable...

Страница 4: ...ii ThinkCentre M720t User Guide and Hardware Maintenance Manual ...

Страница 5: ...l drive eject close button optional 2 Optical drive activity indicator optional 3 Internal speaker 4 Storage drive status indicator 5 Card reader slot optional 6 Power button 7 Power indicator 8 Microphone connector 9 Headset connector 10 Type C USB 3 1 Gen 1 connector 11 USB 3 1 Gen 1 connectors 2 12 USB 3 1 Gen 2 connectors 2 13 Illuminated red dot 1 Optical drive eject close button optional Cop...

Страница 6: ...indicator is on when the computer is on 8 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 9 Headset connector Used to connect a headset or headphones to your computer 10 Type C USB 3 1 Gen 1 connector Used to connect a Type C USB 3 1 compatible device 11 USB 3 1 Gen 1 conn...

Страница 7: ...ctor 9 Smart cable clip slots 2 optional 10 Serial connector optional 11 PCI Express card area 12 Padlock loop 13 Security lock slot 14 Power cord connector 1 Audio line out connector 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 betwee...

Страница 8: ...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 ...

Страница 9: ... 4 pin power connector 2 Microprocessor fan connector 3 Power button connector 4 Internal speaker connector 5 Auxiliary fan connector 2 6 10 pin power connector 7 Auxiliary fan connector 1 8 SATA power connectors 2 9 Clear CMOS Complementary Metal Oxide Semiconductor Recovery jumper 10 SATA 3 0 connectors 3 11 M 2 solid state drive slot 12 M 2 Wi Fi card slot 13 Thermal sensor connector 14 Illumin...

Страница 10: ...t DIMM1 26 Memory slot DIMM2 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 ...

Страница 11: ...orts 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 DisplayPort 1 2 out connector Ethernet connector PS 2 keyboard connector optional PS 2 ...

Страница 12: ... LAN Wireless LAN optional Bluetooth optional Physical dimensions Width 150 mm 5 9 inches Height 360 mm 14 2 inches Depth 270 5 mm 10 6 inches Weight without the package Maximum configuration as shipped 6 9 kg 15 2 lb 8 ThinkCentre M720t User Guide and Hardware Maintenance Manual ...

Страница 13: ...ur 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 op...

Страница 14: ... 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 ins...

Страница 15: ...Figure 8 Attaching a smart cable clip Chapter 3 Computer locks 11 ...

Страница 16: ...12 ThinkCentre M720t User Guide and Hardware Maintenance Manual ...

Страница 17: ...try 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 protectiv...

Страница 18: ... 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 repl...

Страница 19: ... Wi Fi card shield 3 Rear fan 8 Memory module 32 Power supply assembly 7 Microprocessor 10 M 2 solid state drive heat sink 36 E lock 9 System board 11 M 2 solid state drive 13 Power button 12 M 2 solid state drive bracket 14 Optical drive cable 16 Optical drive bracket 15 Card reader 22 Optical drive 17 Front I O bracket Chapter 4 Replacing hardware 15 ...

Страница 20: ...e 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 Remove your old...

Страница 21: ...dels 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 Remove the new wireless mouse from...

Страница 22: ...Figure 13 Opening the battery compartment Figure 14 Taking out the USB dongle 18 ThinkCentre M720t User Guide and Hardware Maintenance Manual ...

Страница 23: ...Figure 15 Connecting the USB dongle to a USB connector Figure 16 Installing the mouse batteries Chapter 4 Replacing hardware 19 ...

Страница 24: ... use The flashing amber LED indicates a low battery level Push the power switch to the off position when you are not using the mouse to extend the battery life After disconnecting the USB dongle from your computer store it in the wireless mouse compartment or in the wireless keyboard compartment 20 ThinkCentre M720t User Guide and Hardware Maintenance Manual ...

Страница 25: ... drives and turn off all connected devices and the computer 2 Disconnect all power cords from electrical outlets and disconnect all cables that are connected to the computer 3 Replace the power cord Note Your power cord might look different from the one illustrated Figure 19 Removing the power cord Figure 20 Installing the power cord Chapter 4 Replacing hardware 21 ...

Страница 26: ...Guide 1 Remove any media from the drives and turn off all connected devices and the computer 2 Disconnect all power cords from electrical outlets and disconnect all cables that are connected to the computer 3 Replace the dust shield Figure 21 Removing the dust shield Figure 22 Installing the dust shield 22 ThinkCentre M720t User Guide and Hardware Maintenance Manual ...

Страница 27: ...e computer 2 Disconnect all power cords from electrical outlets and disconnect all cables that are connected to the computer 3 Unlock any locking device that secures the computer cover 4 Remove the dust shield if necessary See Replacing the dust shield on page 22 5 Remove the computer cover Figure 23 Removing the computer cover 6 Complete the replacement See Completing the parts replacement on pag...

Страница 28: ...open your computer or attempt any repairs before reading the Important Product Information Guide 1 Remove the computer cover See Removing the computer cover on page 23 2 Remove the front bezel See Replacing the front bezel on page 23 3 Disconnect the signal and power connectors from the optical drive 4 Replace the optical drive 24 ThinkCentre M720t User Guide and Hardware Maintenance Manual ...

Страница 29: ...placing the optical drive bracket Attention Do not open your computer or attempt any repairs before reading the Important Product Information Guide 1 Remove the computer cover See Removing the computer cover on page 23 2 Remove the front bezel See Replacing the front bezel on page 23 3 Remove the optical drive See Replacing the optical drive on page 24 4 Replace the optical drive bracket Chapter 4...

Страница 30: ... before reading the Important Product Information Guide Replacing the 3 5 inch storage drive 1 Remove the computer cover See Removing the computer cover on page 23 2 Remove the front bezel See Replacing the front bezel on page 23 3 Disconnect the signal and power connectors from the storage drive 4 Refer to the following to replace the 3 5 inch storage drive 3 5 inch primary storage drive 26 Think...

Страница 31: ...Figure 30 Opening the drive bay Figure 31 Removing the 3 5 inch primary storage drive Chapter 4 Replacing hardware 27 ...

Страница 32: ...Figure 32 Installing the 3 5 inch primary storage drive Figure 33 Closing the drive bay 3 5 inch secondary storage drive 28 ThinkCentre M720t User Guide and Hardware Maintenance Manual ...

Страница 33: ...Figure 34 Opening the drive bay Figure 35 Removing the 3 5 inch secondary storage drive Chapter 4 Replacing hardware 29 ...

Страница 34: ...ge drive 6 Complete the replacement See Completing the parts replacement on page 74 Replacing the 2 5 inch storage drive 1 Remove the storage converter with the 2 5 inch storage drive See Replacing the 3 5 inch storage drive 2 Replace the 2 5 inch storage drive in the storage converter 30 ThinkCentre M720t User Guide and Hardware Maintenance Manual ...

Страница 35: ...e parts replacement on page 74 Replacing a memory module Attention Do not open your computer or attempt any repairs before reading the Important Product Information Guide Notes Before the installation ensure that the memory slot latches are open During the installation ensure that you follow the installation order for memory modules shown in the following figure Chapter 4 Replacing hardware 31 ...

Страница 36: ...move the computer cover See Removing the computer cover on page 23 2 Remove the front bezel See Replacing the front bezel on page 23 3 Replace a memory module Figure 41 Opening the drive bay 32 ThinkCentre M720t User Guide and Hardware Maintenance Manual ...

Страница 37: ... the installation ensure that you align the memory module to the slot and press down on both ends until the latches are fully engaged with a click Figure 43 Installing the memory module Figure 44 Closing the drive bay Chapter 4 Replacing hardware 33 ...

Страница 38: ...computer cover on page 23 2 Remove the front bezel See Replacing the front bezel on page 23 3 Replace a PCI Express card Notes When you remove the PCI Express card press the latch to disengage it from the slot Then gently remove the card from the slot When you install the PCI Express card press down on the rear end of the card until the latch is engaged with a click Figure 45 Opening the drive bay...

Страница 39: ...Figure 46 Removing the PCI Express card Figure 47 Installing the PCI Express card Chapter 4 Replacing hardware 35 ...

Страница 40: ...en your computer or attempt any repairs before reading the Important Product Information Guide 1 Remove the computer cover See Removing the computer cover on page 23 2 Remove the front bezel See Replacing the front bezel on page 23 3 Replace the Wi Fi card Figure 49 Opening the drive bay 36 ThinkCentre M720t User Guide and Hardware Maintenance Manual ...

Страница 41: ... shield type 1 and type 2 Figure 51 Disconnecting the Wi Fi antennas and removing the Wi Fi card type 1 and type 2 Figure 52 Installing the Wi Fi card and connecting the Wi Fi antennas type 1 and type 2 Chapter 4 Replacing hardware 37 ...

Страница 42: ... Do not open your computer or attempt any repairs before reading the Important Product Information Guide 1 Remove the computer cover See Removing the computer cover on page 23 2 Remove the front bezel See Replacing the front bezel on page 23 3 Depending on your computer model refer to one of the following to replace the M 2 solid state drive Type 1 38 ThinkCentre M720t User Guide and Hardware Main...

Страница 43: ...Figure 55 Opening the drive bay Figure 56 Removing the M 2 solid state drive heat sink Chapter 4 Replacing hardware 39 ...

Страница 44: ...gure 57 Unlocking the M 2 solid state drive clip Figure 58 Removing the M 2 solid state drive Figure 59 Installing the M 2 solid state drive 40 ThinkCentre M720t User Guide and Hardware Maintenance Manual ...

Страница 45: ...Figure 60 Locking the M 2 solid state drive clip Figure 61 Installing the M 2 solid state drive heat sink Figure 62 Closing the drive bay Chapter 4 Replacing hardware 41 ...

Страница 46: ... Type 2 Figure 63 Opening the drive bay Figure 64 Removing the M 2 solid state drive heat sink 42 ThinkCentre M720t User Guide and Hardware Maintenance Manual ...

Страница 47: ...Figure 65 Unlocking the M 2 solid state drive clip Figure 66 Removing the M 2 solid state drive Figure 67 Installing the M 2 solid state drive Chapter 4 Replacing hardware 43 ...

Страница 48: ...Figure 68 Locking the M 2 solid state drive clip Figure 69 Installing the M 2 solid state drive heat sink Figure 70 Closing the drive bay 44 ThinkCentre M720t User Guide and Hardware Maintenance Manual ...

Страница 49: ...over See Removing the computer cover on page 23 2 Remove the front bezel See Replacing the front bezel on page 23 3 Remove the M 2 solid state drive See Replacing the M 2 solid state drive on page 38 4 Replace the M 2 solid state drive bracket Figure 71 Removing the M 2 solid state drive bracket Figure 72 Installing the M 2 solid state drive bracket 5 Complete the replacement See Completing the pa...

Страница 50: ...ver remove the cover on a power supply or any part that has the following label attached Hazardous voltage current and energy levels are present inside any component that has this label attached There are no serviceable parts inside these components If you suspect a problem with one of these parts contact a service technician 1 Remove the computer cover See Removing the computer cover on page 23 2...

Страница 51: ...Figure 73 Opening the drive bay Figure 74 Removing the power supply assembly Chapter 4 Replacing hardware 47 ...

Страница 52: ... 74 Replacing the Wi Fi antennas Attention Do not open your computer or attempt any repairs before reading the Important Product Information Guide Replacing the front Wi Fi antenna 1 Remove the computer cover See Removing the computer cover on page 23 2 Remove the front bezel See Replacing the front bezel on page 23 3 Replace the front Wi Fi antenna 48 ThinkCentre M720t User Guide and Hardware Mai...

Страница 53: ... the replacement See Completing the parts replacement on page 74 Replacing the rear Wi Fi antenna 1 Remove the computer cover See Removing the computer cover on page 23 2 Remove the front bezel See Replacing the front bezel on page 23 3 Replace the rear Wi Fi antenna Chapter 4 Replacing hardware 49 ...

Страница 54: ...Figure 79 Removing the rear Wi Fi antenna cover Figure 80 Removing the rear Wi Fi antenna Figure 81 Installing the rear Wi Fi antenna 50 ThinkCentre M720t User Guide and Hardware Maintenance Manual ...

Страница 55: ...ore reading the Important Product Information Guide 1 Remove the computer cover See Removing the computer cover on page 23 2 Remove the front bezel See Replacing the front bezel on page 23 3 Disconnect the internal speaker cable from the system board 4 Replace the internal speaker Figure 83 Opening the drive bay Chapter 4 Replacing hardware 51 ...

Страница 56: ...Figure 84 Removing the internal speaker Figure 85 Installing the internal speaker 52 ThinkCentre M720t User Guide and Hardware Maintenance Manual ...

Страница 57: ...tention Do not open your computer or attempt any repairs before reading the Important Product Information Guide 1 Remove the computer cover See Removing the computer cover on page 23 2 Remove the front bezel See Replacing the front bezel on page 23 3 Disconnect the front fan cable from the system board 4 Replace the front fan Figure 87 Opening the drive bay Chapter 4 Replacing hardware 53 ...

Страница 58: ...Figure 88 Removing the front fan Figure 89 Installing the front fan 54 ThinkCentre M720t User Guide and Hardware Maintenance Manual ...

Страница 59: ...on Do not open your computer or attempt any repairs before reading the Important Product Information Guide 1 Remove the computer cover See Removing the computer cover on page 23 2 Remove the front bezel See Replacing the front bezel on page 23 3 Disconnect the illuminated red dot cable from the system board 4 Replace the illuminated red dot Figure 91 Opening the drive bay Chapter 4 Replacing hardw...

Страница 60: ...Figure 92 Removing the illuminated red dot cable Figure 93 Installing the illuminated red dot cable Figure 94 Closing the drive bay 56 ThinkCentre M720t User Guide and Hardware Maintenance Manual ...

Страница 61: ...or attempt any repairs before reading the Important Product Information Guide 1 Remove the computer cover See Removing the computer cover on page 23 2 Remove the front bezel See Replacing the front bezel on page 23 3 Disconnect the thermal sensor cable from the system board 4 Replace the thermal sensor Figure 95 Opening the drive bay Figure 96 Removing the thermal sensor Chapter 4 Replacing hardwa...

Страница 62: ...cket Attention Do not open your computer or attempt any repairs before reading the Important Product Information Guide 1 Remove the computer cover See Removing the computer cover on page 23 2 Remove the front bezel See Replacing the front bezel on page 23 3 Disconnect the power button cable and the card reader cable from the system board 4 Replace the front I O bracket 58 ThinkCentre M720t User Gu...

Страница 63: ...Figure 99 Opening the drive bay Figure 100 Removing the front I O bracket Chapter 4 Replacing hardware 59 ...

Страница 64: ...cement on page 74 Replacing the power button Attention Do not open your computer or attempt any repairs before reading the Important Product Information Guide 1 Remove the computer cover See Removing the computer cover on page 23 2 Remove the front bezel See Replacing the front bezel on page 23 3 Remove the front I O bracket See Replacing the front I O bracket on page 58 60 ThinkCentre M720t User ...

Страница 65: ... 74 Replacing the card reader board Attention Do not open your computer or attempt any repairs before reading the Important Product Information Guide 1 Remove the computer cover See Removing the computer cover on page 23 2 Remove the front bezel See Replacing the front bezel on page 23 3 Remove the front I O bracket See Replacing the front I O bracket on page 58 4 Replace the card reader board Cha...

Страница 66: ...eading the Important Product Information Guide CAUTION The heat sink and fan assembly might be very hot Turn off the computer and wait three to five minutes to let the computer cool before removing the computer cover 1 Remove the computer cover See Removing the computer cover on page 23 2 Remove the front bezel See Replacing the front bezel on page 23 3 Disconnect the microprocessor fan cable from...

Страница 67: ...Figure 107 Opening the drive bay Figure 108 Removing the heat sink and fan assembly Chapter 4 Replacing hardware 63 ...

Страница 68: ... open your computer or attempt any repairs before reading the Important Product Information Guide CAUTION The heat sink and microprocessor might be very hot Before you open the computer cover turn off the computer and wait several minutes until the computer is cool 1 Remove the computer cover See Removing the computer cover on page 23 2 Remove the front bezel See Replacing the front bezel on page ...

Страница 69: ...look different from the one illustrated Touch only the edges of the microprocessor Do not touch the gold contacts on the bottom Do not drop anything onto the microprocessor socket while it is exposed The socket pins must be kept as clean as possible Figure 111 Opening the drive bay Figure 112 Unlocking the microprocessor socket retainer Chapter 4 Replacing hardware 65 ...

Страница 70: ...icroprocessor socket upward Figure 114 Removing the microprocessor Figure 115 Installing the microprocessor Figure 116 Pivoting the microprocessor socket downward 66 ThinkCentre M720t User Guide and Hardware Maintenance Manual ...

Страница 71: ...his information active when you turn off the computer The coin cell battery normally requires no charging or maintenance throughout its life however no coin cell battery lasts forever If the coin cell battery fails the date time and configuration information including passwords are lost An error message is displayed when you turn on the computer To dispose of the coin cell battery refer to the Lit...

Страница 72: ...ing the drive bay Figure 120 Pressing the metallic tab using a driver Figure 121 Removing the coin cell battery Figure 122 Placing the coin cell battery 68 ThinkCentre M720t User Guide and Hardware Maintenance Manual ...

Страница 73: ...Lithium coin cell battery notice topic in the Safety and Warranty Guide Replacing the E lock Attention Do not open your computer or attempt any repairs before reading the Important Product Information Guide Note To remove the screws you need a special tool T15 star wrench 1 Remove the computer cover See Removing the computer cover on page 23 2 Disconnect the E lock cable from the system board 3 Re...

Страница 74: ...ch Attention Do not open your computer or attempt any repairs before reading the Important Product Information Guide 1 Remove the computer cover See Removing the computer cover on page 23 2 Disconnect the cover presence switch cable from the system board 3 Refer to one of the following to replace the cover presence switch For models with E lock installed 70 ThinkCentre M720t User Guide and Hardwar...

Страница 75: ...Figure 127 Removing the cover presence switch Figure 128 Installing the cover presence switch For models without E lock installed Chapter 4 Replacing hardware 71 ...

Страница 76: ...acement See Completing the parts replacement on page 74 Replacing the rear fan Attention Do not open your computer or attempt any repairs before reading the Important Product Information Guide 1 Remove the computer cover See Removing the computer cover on page 23 2 Disconnect the rear fan cable from the system board 72 ThinkCentre M720t User Guide and Hardware Maintenance Manual ...

Страница 77: ...move the front bezel See Replacing the front bezel on page 23 3 Remove the front I O bracket See Replacing the front I O bracket on page 58 4 Remove all memory modules See Replacing a memory module on page 31 5 Remove the heat sink and fan assembly See Replacing the heat sink and fan assembly on page 62 6 Remove the microprocessor See Replacing the microprocessor on page 64 7 Remove all PCI Expres...

Страница 78: ...e 134 Installing the system board 12 Route all the cables that you disconnected from the failing system board and then reconnect the cables to the new system board 13 Complete the replacement See Completing the parts replacement on page 74 Completing the parts replacement After completing the installation or replacement for all parts reinstall the computer cover and reconnect the cables 74 ThinkCe...

Страница 79: ...re reinstalling the computer cover Keep cables clear of the hinges and sides of the computer chassis to avoid interference when reinstalling the computer cover 3 Reinstall the computer cover Figure 135 Reinstalling the computer cover 4 Place the computer in an upright position 5 If a locking device is available use it to lock the computer 6 Reconnect the external cables and power cords to the corr...

Страница 80: ...76 ThinkCentre M720t User Guide and Hardware Maintenance Manual ...

Страница 81: ...he publication Lenovo may make improvements and or changes in the products and or the programs described in this publication at any time without notice The products described in this document are not intended for use in implantation or other life support applications where malfunction may result in injury or death to persons The information contained in this document does not affect or change Leno...

Страница 82: ...78 ThinkCentre M720t User Guide and Hardware Maintenance Manual ...

Страница 83: ...United States other countries or both Lenovo The Lenovo logo ThinkCentre The ThinkCentre logo DisplayPort is a trademark of the Video Electronics Standards Association Other company product or service names may be trademarks or service marks of others Copyright Lenovo 2018 79 ...

Страница 84: ...80 ThinkCentre M720t User Guide and Hardware Maintenance Manual ...

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