Lenovo ThinkPad T490 Hardware Maintenance Manual
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Lenovo ThinkPad T490 Hardware Maintenance Manual

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Summary of Contents for Lenovo ThinkPad T490

  • Page 1 T490 Hardware Maintenance Manual...
  • Page 2 Appendix A “Notices” on page 101. First Edition (March 2019) © Copyright Lenovo 2019. LIMITED AND RESTRICTED RIGHTS NOTICE: If data or software is delivered pursuant a General Services Administration “GSA” contract, use, reproduction, or disclosure is subject to restrictions set forth in Contract No. GS-35F-05925.

  • Page 3: Table Of Contents

    Power-on password ... Disabling the built-in battery ..Hard disk password ... © Copyright Lenovo 2019...
  • Page 4 Removing the nano-SIM card and the nano- 1170 Power button board with cable, power SIM-card tray ....button ....1010 Keyboard .

  • Page 5: About This Manual

    Before servicing a ThinkPad product, be sure to read all the information under Chapter 1 “Safety information” on page 1 and Chapter 2 “Important service information” on page 21. © Copyright Lenovo 2019...
  • Page 6 T490 Hardware Maintenance Manual...

  • Page 7: Chapter 1. Safety Information

    • Fan louvers on the machine help to prevent overheating of internal components. Do not obstruct fan louvers or cover them with labels or stickers. Electrical safety Observe the following rules when working on electrical equipment. © Copyright Lenovo 2019...
  • Page 8 Important: • Use only approved tools and test equipment. Some hand tools have handles covered with a soft material that does not insulate you when working with live electrical currents. • Many customers have, near their equipment, rubber floor mats that contain small conductive fibers to decrease electrostatic discharges (ESD).

  • Page 9: Safety Inspection Guide

    0.1 ohm or less between the external ground pin and the frame ground. b. The power cord should be the authorized type specified for your computer. Go to: https:// support.lenovo.com/partslookup c. Insulation must not be frayed or worn. 4. Check for cracked or bulging batteries.

  • Page 10: Grounding Requirements

    2. Ensure that the ESD protective devices you use have been certified (ISO 9000) as fully effective. When handling ESD-sensitive parts: • Keep the parts in protective packages until they are inserted into the product. • Avoid contact with other people. •...
  • Page 11 DANGER DANGER DANGER DANGER DANGER DANGER Chapter 1 Safety information...
  • Page 12 DANGER T490 Hardware Maintenance Manual...
  • Page 13 PERIGO Chapter 1 Safety information...
  • Page 14 PERIGO PERIGO PERIGO PERIGO T490 Hardware Maintenance Manual...
  • Page 15 PERIGO PERIGO PERIGO DANGER DANGER Chapter 1 Safety information...
  • Page 16 DANGER DANGER DANGER DANGER DANGER T490 Hardware Maintenance Manual...
  • Page 17 DANGER VORSICHT VORSICHT VORSICHT VORSICHT Chapter 1 Safety information...
  • Page 18 VORSICHT VORSICHT VORSICHT VORSICHT T490 Hardware Maintenance Manual...
  • Page 19 Chapter 1 Safety information...
  • Page 20 T490 Hardware Maintenance Manual...
  • Page 21 Chapter 1 Safety information...
  • Page 22 T490 Hardware Maintenance Manual...
  • Page 23 Chapter 1 Safety information...
  • Page 24 T490 Hardware Maintenance Manual...
  • Page 25 Chapter 1 Safety information...
  • Page 26 T490 Hardware Maintenance Manual...

  • Page 27: Chapter 2. Important Service Information

    – “FRU identification” on page 23 Important: • Advise customers to contact the Lenovo Customer Support Center if they need any assistance in obtaining or installing any software fixes, drivers, and UEFI BIOS downloads. Telephone numbers for Lenovo Support are available at: https://pcsupport.lenovo.com/supportphonelist...

  • Page 28: Important Notice For Replacing A System Board

    Dynamic Configure To Order (CTO) model This model provides the ability for a customer to configure a Lenovo solution from a Web site, and have this configuration sent to fulfillment, where it is built and shipped directly to the customer. The machine label and eSupport will load these products as the 4-character MT, 4-character model, and 2-character country code.

  • Page 29: Fru Identification

    FRU identification To identify FRUs for a product, do the following: 1. Go to: https://support.lenovo.com/partslookup 2. Type the Machine Type in the corresponding field to get a general FRU list, or type the Serial Number for more detailed FRU information.
  • Page 30 T490 Hardware Maintenance Manual...

  • Page 31: Chapter 3. General Checkout

    Before checking problems with the computer, determine whether the damage is covered under the warranty by referring to the following list: The following are not covered under warranty: • LCD panel cracked from the application of excessive force or from being dropped • Scratched (cosmetic) parts © Copyright Lenovo 2019...

  • Page 32: Checkout Guide

    Note: If you are unable to isolate and repair the problem yourself after running the program, save and print the log files created by the program. You need the log files when you speak to a Lenovo technical support representative.

  • Page 33: Uefi Diagnostic Program

    If the computer you are servicing is not installed with the UEFI diagnostic program, you can download a bootable diagnostic program from the Lenovo Support Web site. The bootable diagnostic program enables you to view system information and test some hardware devices in your computer, such as memory, storage devices, the LCD, and system board buses.

  • Page 34: Power System Checkout

    1. Go to https://www.lenovo.com/diags 2. Click Lenovo Bootable Diagnostics. 3. Follow the instructions on the Web site to create a bootable diagnostic medium on a USB device or disc. To use the diagnostic medium you have created, do one of the following: •...

  • Page 35: Checking The Built-In Battery And Operational Charging

    To check the USB-C type ac power adapter, do the following: 1. Connect the computer to a power outlet and turn on the computer. 2. Start Lenovo Vantage program, and then click Hardware Settings ➙ Power. The ac power adapter information is displayed.
  • Page 36 Wire Voltage (V dc) +2.5 to +3.2 Black Ground • If the voltage is correct, replace the system board. • If the voltage is not correct, replace the coin-cell battery. • If the coin-cell battery discharges quickly after replacement, replace the system board. T490 Hardware Maintenance Manual...

  • Page 37: Chapter 4. Related Service Information

    1. Open the Start menu, and then click Settings ➙ Update & security ➙ Recovery. 2. In the Advanced startup section, click Restart now ➙ Troubleshoot ➙ Advanced options. 3. Select a startup option you want, and then follow the instructions on the screen. © Copyright Lenovo 2019...

  • Page 38: Recovering Your Operating System If Windows 10 Fails To Start

    Recovering your operating system if Windows 10 fails to start The Windows recovery environment on your computer is capable of operating independently from the Windows 10 operating system. This enables you to recover or repair the operating system even if the Windows 10 operating system fails to start.

  • Page 39: Passwords

    If a master hard disk password has been set, it can be used to access the hard disk drive. If no master hard disk password is available, neither Lenovo nor Lenovo authorized service technicians provide any services to reset either the user hard disk password or the master hard disk password, or to recover data from the hard disk drive.

  • Page 40: How To Remove The Power-On Password

    The hard disk drive can be replaced for a scheduled fee. To put the system back to operational status, the only Lenovo and Lenovo-authorized service solution would be to replace the hard disk drive or solid-state drive with a scheduled fee.

  • Page 41: Power Management

    Power management To reduce power consumption, the computer has two power management modes: sleep and hibernation. Sleep mode When the computer enters sleep mode, the following events occur: • The LCD is powered off. • The hard disk drive or solid-state drive is powered off. •...

  • Page 42: Symptom-To-Fru Index

    Symptom-to-FRU index This section contains following information: • “Numeric error codes” on page 36 • “Error messages” on page 38 • “Beep errors” on page 38 • “No-beep symptoms” on page 40 • “LCD-related symptoms” on page 40 • “Intermittent problems” on page 41 •...
  • Page 43 Table 2. Numeric error codes (continued) Symptom or error (beeps, if any) FRU or action, in sequence 0191 1. Run the ThinkPad Setup program, and then save System Security - Invalid Remote Change requested. current setting by pressing F10. 2. Replace the system board. 0199 1.

  • Page 44: Error Messages

    Beep errors Lenovo SmartBeep technology enables you to decode beep errors with your smartphone when a black screen occurs with beeps from your computer. To decode the beep error with Lenovo SmartBeep technology, do the following: 1.
  • Page 45 The following section describes some beep errors and the corresponding solutions. Note: Do not attempt to service a product yourself unless instructed to do so by the Customer Support Center or product documentation. Only use a Lenovo-authorized service provider to repair your product. Error codes...

  • Page 46: No-Beep Symptoms

    If the LCD you are servicing has two or less visible defective pixels, it should not be considered faulty. However, if the LCD has three or more visible defective pixels, it will be deemed as defective by Lenovo and it should be replaced.

  • Page 47: Intermittent Problems

    Table 5. LCD-related symptoms FRU or action, in sequence Symptom or error No beep, power-on indicator on, and a blank LCD during 1. Run LCD Self Test. POST. 2. Replace the system board. • LCD backlight not working. 1. Reseat the LCD connectors. •...
  • Page 48 b. LCD assembly T490 Hardware Maintenance Manual...

  • Page 49: Chapter 5. Special Keys

    1. Go to Control Panel, and then change the view of Control Panel from Category to Large icons or Small icons. 2. Click Lenovo - Keyboard Manager and the Keyboard Manager window is displayed. 3. Select the options of your preference.
  • Page 50 Table 6. Special keys (continued) Description Special key Open the calculator. Put your computer into sleep mode. Open the Snipping Tool program. Fn+Spacebar Switch between different keyboard backlight statuses if your computer supports keyboard backlight. Fn+4 Put the computer into sleep mode. To wake up the computer, press Fn or the power button. Fn+B Equal the Break key on a conventional external keyboard.

  • Page 51: Chapter 6. Locations

    Chapter 6. Locations Locating computer controls, connectors, and indicators This topic introduces the locations of the computer controls, connectors, and indicators. Front 1. Infrared camera* 4. Camera* 5. Multi-touch screen* 2. ThinkShutter* 3. Microphones* * for selected models © Copyright Lenovo 2019...

  • Page 52: Base

    Base 1. Power button 4. NFC label* ® 2. Fingerprint reader* 5. TrackPoint pointing device 3. Trackpad 6. Speakers * for selected models Left ™ 1. USB-C connector (USB 3.1 Gen 1) 5. HDMI™ connector ™ 2. Thunderbolt 3 connector (USB-C) 6.

  • Page 53: Right

    Right 1. Smart-card slot* 3. Ethernet connector 2. Always On USB 3.1 connector Gen 1 4. Security-lock slot * for selected models Bottom 1. Docking-station hook holes 3. Emergency-reset hole 2. Keyboard drainage hole Chapter 6 Locations...

  • Page 54: Rear

    CRUs, you can either install the CRU yourself or you can request that a Service Provider install the CRU according to the warranty service for your product. If you intend on installing the CRU, Lenovo will ship the CRU to you. CRU information and replacement instructions are shipped with your product and are available from Lenovo at any time upon request.

  • Page 55: Major Frus And Crus

    Major FRUs and CRUs Note: Depending on the computer model, your computer might look different from the illustration above. Table 7. Major FRUs and CRUs FRU description Self-service CRU Optional-service CRU LCD unit Speaker assembly Power button board with cable Power button Chapter 6 Locations...
  • Page 56 NFC cable* Fingerprint reader bracket* Fingerprint reader module* Fingerprint reader cable* Trackpad Trackpad cable Keyboard TrackPoint cap Lenovo factory recovery USB key* Miscellaneous parts kits (see “Miscellaneous parts” on page 52) Power cord ac power adapter T490 Hardware Maintenance Manual...

  • Page 57: Lcd Frus

    * for selected models Note: The Lenovo factory recovery USB key is used to restore the Microsoft Windows operating system. It might not come with the computer, and a user might order it from https://pcsupport.lenovo.com/ , though additional shipping and handling fees might apply.

  • Page 58: Miscellaneous Parts

    Table 8. LCD FRUs (continued) FRU description Self-service CRU Optional-service CRU LCD panel LCD hinges Microphones board* Conventional camera/mic combo board* Infrared camera/mic combo board* LCD cover assembly Wireless LAN/WAN antenna assembly* Conventional camera/LED cable* LED cable* Infrared camera/LED cable* LCD cable * for selected models Miscellaneous parts...

  • Page 59: Connector And Cable Guide

    Connector and cable guide This topic provides information to help Lenovo authorized service technicians identify connectors and cables for replacement purpose. To view each FRU and the exploded illustration of the computer, see “Major FRUs and CRUs” on page 49 and “LCD FRUs” on page 51.
  • Page 60 Table 10. System board connector and cable guide (continued) Item Internal cable required Connector (location) Cable connection LCD connector (internal) LCD cable Connect one end of the LCD cable to the LCD panel and the other end to this connector. USB-C connecor (external) Connect USB-C compatible devices or a USB-C power adapter...

  • Page 61: Looking Up Fru Information

    Install a nano-SIM card into the nano-SIM card tray. Then, insert the tray with the card into this slot. Looking up FRU information For detailed FRU information, including part numbers, descriptions, and substitution part numbers, go to: https://support.lenovo.com/partslookup Chapter 6 Locations...
  • Page 62 T490 Hardware Maintenance Manual...

  • Page 63: Chapter 7. Fru Replacement Notices

    CRU to you. CRU information and replacement instructions are shipped with your product and are available from Lenovo at any time upon request. You can find a list of CRUs for your product in this Hardware Maintenance Manual. An electronic version of this manual can be found at .

  • Page 64: Retaining Serial Numbers

    Do the following when you service the computer: • Keep the screw kit in your tool bag. For the part number of the screw kit, go to: https://support.lenovo.com/partslookup • It is recommended to use new screws. • It is recommended to use each screw only once.

  • Page 65: Retaining The Uuid

    Maintenance key. Note: Only an authorized Lenovo service technician can access the above Web site. 3. Restart the computer. 4. When the logo is displayed, press Esc. The ThinkPad Config Information Update Utility interface is displayed.
  • Page 66 5. Type 2 under Enter the action desired, then press Enter. The Auto UUID generation utility interface is displayed. 6. Type y under Change UUID. OK? [Y/N], then press Enter. A new UUID is created and written. If a valid UUID already exists, it is not overwritten.

  • Page 67: Chapter 8. Removing Or Replacing A Fru

    CRU to you. CRU information and replacement instructions are shipped with your product and are available from Lenovo at any time upon request. You can find a list of CRUs for your product in this Hardware Maintenance Manual. An electronic version of this manual can be found at .

  • Page 68: Before Servicing The Computer

    • If the keyboard must be removed to access other FRUs, you need the keyboard removal tool (product part number: 01LX856) to remove the keyboard. You can purchase the tool as a separate FRU at: https:// support.lenovo.com/partslookup T490 Hardware Maintenance Manual...
  • Page 69 Step Screw (quantity) Color Torque M2 × 1.65 mm, flat-head, nylon-coated (2) Silver 0.143 Nm (1.4 kgf-cm) Chapter 8 Removing or replacing a FRU...
  • Page 70 T490 Hardware Maintenance Manual...

  • Page 71: 1020 Base Cover Assembly

    When installing: Ensure that the connector is attached firmly. 1020 Base cover assembly Removal steps of the base cover assembly Loosen the screws that secure the base cover assembly. Chapter 8 Removing or replacing a FRU...
  • Page 72 Pry up the latches in ascending alphabetical order (a to k) and remove the base cover assembly Applying labels to the base cover assembly Note: Depending on the country or region of delivery, the labels might be slightly different from the ones in the following illustration.

  • Page 73: 1030 M.2 Solid-State Drive

    1030 M.2 solid-state drive For access, remove this FRU: • “1020 Base cover assembly” on page 65 Attention: The M.2 solid-state drive is sensitive. Inappropriate handling might cause damage and permanent loss of data. When handling the M.2 solid-state drive, observe the following guidelines: •...

  • Page 74: 1040 Memory Module

    Removal steps of the long M.2 solid-state drive Step Screw (quantity) Color Torque M2 × 2.5 mm, big-head, nylon-coated (1) Black 0.181 Nm (1.85 kgf-cm) Removal steps of the short M.2 solid-state drive and the bracket Torque Step Screw (quantity) Color M2 ×...

  • Page 75: 1050 Speaker Assembly

    Removal steps of the memory module When installing: Insert the notched end of the memory module into the slot at an angle of about 20 degrees. Press the memory module firmly, and pivot it downwards until it snaps into place. Ensure that the memory module is firmly installed in the slot and does not move easily.

  • Page 76: 1060 Wireless Wan Card

    Removal steps of the speaker assembly Torque Step Screw (quantity) Color M2 × 2.2+2.3 mm, flat-head, nylon-coated (3) Black 0.181 Nm (1.85 kgf-cm) 1060 Wireless WAN card For access, remove this FRU: • “1020 Base cover assembly” on page 65 T490 Hardware Maintenance Manual...

  • Page 77: 1070 Coin-Cell Battery

    Removal steps of the wireless WAN card Step Screw (quantity) Color Torque Black 0.181 Nm M2 × 2.5 mm, big-head, nylon-coated (1) (1.85 kgf-cm) When installing: • For WWAN card with two antenna cables: ensure that you connect the orange cable to the main connector, and the blue cable to the auxiliary connector.

  • Page 78: 1080 Built-In Battery

    The Lenovo Vantage program provides an automatic battery diagnostic test that determines if the battery is defective. A battery FRU should not be replaced unless this diagnostic test shows that the battery is defective. The only exception to this is if the battery is physically damaged or a customer is reporting a possible safety issue.

  • Page 79: 1090 Thermal Fan Assembly

    Step Screw (quantity) Color Torque M2 × 4 mm, small-head, nylon-coated (4) Silver 0.181 Nm (1.85 kgf-cm) When installing: • Ensure that the battery connector is attached firmly. • Ensure that the base cover assembly is attached firmly; otherwise, battery connection may fail. 1090 Thermal fan assembly For access, remove this FRU: •...

  • Page 80: 1100 Rj45 Cable, Bracket And Board

    When installing: • Ensure that the connector is attached firmly. • Do not press the top of the fan cover and the fan hub. • Before you attach the fan assembly to the computer, apply thermal grease, at an amount of 0.2 grams, on the parts marked as shown in the following illustrations.
  • Page 81 Removal steps of the RJ45 cable, bracket and board Step Screw (quantity) Color Torque M2 × 4 mm, wafer-head, nylon-coated (3) Black 0.181 Nm (1.85 kgf-cm) Chapter 8 Removing or replacing a FRU...

  • Page 82: 1110 Usb Cable, Bracket And Board

    1110 USB cable, bracket and board For access, remove these FRUs: • “1020 Base cover assembly” on page 65 • “1080 Built-in battery” on page 72 Removal steps of the USB cable, bracket and board T490 Hardware Maintenance Manual...

  • Page 83: 1120 Fingerprint Reader Cable, Bracket And Board

    Step Screw (quantity) Color Torque M2 × 4 mm, wafer-head, nylon-coated (2) Black 0.181 Nm (1.85 kgf-cm) 1120 Fingerprint reader cable, bracket and board For access, remove these FRUs: • “1020 Base cover assembly” on page 65 • “1080 Built-in battery” on page 72 Removal steps of the fingerprint reader cable, bracket and board Chapter 8 Removing or replacing a FRU...

  • Page 84: 1130 Smart Card Reader Module And Cable

    Step Screw (quantity) Color Torque Black 0.181 Nm M2 × 2 mm, wafer-head, nylon-coated (1) (1.85 kgf-cm) 1130 Smart card reader module and cable For access, remove these FRUs: • “1020 Base cover assembly” on page 65 • “1080 Built-in battery” on page 72 Removal steps of the smart card reader module and cable T490 Hardware Maintenance Manual...

  • Page 85: 1140 Trackpad And Cable

    Torque Step Screw (quantity) Color M2 × 2.5 mm, big-head, nylon-coated (2) Black 0.181 Nm (1.85 kgf-cm) 1140 Trackpad and cable For access, remove these FRUs in order: • “1020 Base cover assembly” on page 65 • “1080 Built-in battery” on page 72 Chapter 8 Removing or replacing a FRU...

  • Page 86: 1150 Hall Sensor Board With Cable

    Removal steps of the trackpad and cable Torque Step Screw (quantity) Color M2 × 2 mm, wafer-head, nylon-coated (4) Black 0.181 Nm (1.85 kgf-cm) 1150 Hall sensor board with cable For access, remove these FRUs: • “1020 Base cover assembly” on page 65 •...

  • Page 87: 1160 Nfc Module, Cable And Antenna

    Removal steps of the hall sensor board with cable 1160 NFC module, cable and antenna For access, remove these FRUs: • “1020 Base cover assembly” on page 65 • “1080 Built-in battery” on page 72 Removal steps of the NFC module, cable and antenna Chapter 8 Removing or replacing a FRU...

  • Page 88: 1170 Power Button Board With Cable, Power Button

    1170 Power button board with cable, power button For access, remove this FRU: • “1020 Base cover assembly” on page 65 Removal steps of the power button board with cable, power button T490 Hardware Maintenance Manual...

  • Page 89: 1180 System Board

    Step Screw (quantity) Color Torque Black 0.181 Nm M2 × 3 mm, wafer-head, nylon-coated (1) (1.85 kgf-cm) 1180 System board Important notices for handling the system board: When handling the system board, read the following: • The system board has an accelerometer, which can be broken when several thousands of G-forces are applied. Note: Dropping a system board from a height of as little as 6 inches so that it falls flat on a hard bench can subject the accelerometer to as much as 6000 G's of shock.
  • Page 90 The following table contains the brand name required to complete this step. Note: Input the exact brand name as shown in this table. Brand name Machine types Shared with ThinkPad T490 20N2, 20N3 ThinkPad T590 T490 Hardware Maintenance Manual...
  • Page 91 Torque Step Screw (quantity) Color M2 × 4 mm, flat-head, nylon-coated (4) Black 0.181 Nm (1.85 kgf-cm) M2 × 2.5 mm, big-head, nylon-coated (1) Black 0.181 Nm (1.85 kgf-cm) Chapter 8 Removing or replacing a FRU...
  • Page 92 Step Screw (quantity) Color Torque M2 × 3 mm, flat-head, nylon-coated (3) Silver 0.181 Nm (1.85 kgf-cm) When installing: Ensure that the connectors are attached firmly. Attention: The following components soldered on the top side of the system board are extremely sensitive. When you service the system board, avoid any kind of rough handling.

  • Page 93: 1190 Mimo Wireless-Wan Antenna Assembly

    Note: If the keyboard must be removed to access other FRUs, you need the keyboard removal tool (product part number: 01LX856) to remove the keyboard. You can purchase the tool as a separate FRU at: https://support.lenovo.com/partslookup • “1020 Base cover assembly” on page 65 •...

  • Page 94: 1200 Lcd Unit

    Antenna locations 4x4 MIMO Wireless-WAN antenna (auxiliary)* 4x4 MIMO Wireless-WAN antenna (main)* * for selected models 1200 LCD unit For access, remove this FRU: • “1020 Base cover assembly” on page 65 Removal steps of the LCD unit T490 Hardware Maintenance Manual...
  • Page 95 Torque Step Screw (quantity) Color M2.5 × 4 mm, flat-head, nylon-coated (4) Silver 0.294 Nm (3 kgf-cm) Chapter 8 Removing or replacing a FRU...

  • Page 96: 1210 Keyboard Bezel Assembly

    Note: If the keyboard must be removed to access other FRUs, you need the keyboard removal tool (product part number: 01LX856) to remove the keyboard. You can purchase the tool as a separate FRU at: https://support.lenovo.com/partslookup • “1020 Base cover assembly” on page 65 •...

  • Page 97: 2010 Lcd Bezel Sheet And Lcd Bezel

    • “1080 Built-in battery” on page 72 • “1090 Thermal fan assembly” on page 73 • “1100 RJ45 cable, bracket and board” on page 74 • “1110 USB cable, bracket and board” on page 76 • “1120 Fingerprint reader cable, bracket and board” on page 77 •...

  • Page 98: 2030 Camera/Microphone Module

    Removal steps of the LCD panel When installing: Ensure that the LCD connector is attached firmly. 2030 Camera/microphone module For access, remove these FRUs in order: • “1200 LCD unit” on page 88 • “2010 LCD bezel sheet and LCD bezel” on page 91 •...
  • Page 99 Removal steps of the infrared camera/microphone module When installing: Ensure that the connector is attached firmly. Removal steps of the conventional camera/microphone module Chapter 8 Removing or replacing a FRU...

  • Page 100: 2040 Lcd Hinges

    When installing: Ensure that the connector is attached firmly. 2040 LCD hinges For access, remove these FRUs in order: • “1200 LCD unit” on page 88 • “2010 LCD bezel sheet and LCD bezel” on page 91 Removal steps of the LCD hinges Step Screw (quantity) Color...

  • Page 101: 2050 Camera/Led Cable

    2050 Camera/LED cable For access, remove these FRUs in order: • “1200 LCD unit” on page 88 • “2010 LCD bezel sheet and LCD bezel” on page 91 • “2020 LCD panel” on page 91 • “2040 LCD hinges” on page 94 Removal steps of the infrared camera/LED cable When installing: Ensure that the connector is attached firmly.

  • Page 102: 2060 Lcd Cable

    Removal steps of the LED cable When installing: Ensure that the connector is attached firmly. 2060 LCD cable For access, remove these FRUs in order: • “1200 LCD unit” on page 88 • “2010 LCD bezel sheet and LCD bezel” on page 91 •...
  • Page 103 Removal steps of the wireless-LAN antenna assembly Release the antenna cables from the cable guides on the LCD cover assembly. Attention: When you route the cables, ensure that they are not subject to any tension. Tension could cause the cables to be damaged by the cable guides, or a wire to be broken. Removal steps of the wireless-LAN/WAN antenna assembly Chapter 8 Removing or replacing a FRU...

  • Page 104: 2080 Lcd Cover Assembly

    Attention: When you route the cables, ensure that they are not subject to any tension. Tension could cause the cables to be damaged by the cable guides, or a wire to be broken. Antenna locations Wireless-LAN antenna (main) Wireless-WAN antenna (main)* Wireless-WAN antenna (auxiliary)* Wireless-LAN antenna (auxiliary) * for selected models...
  • Page 105 • “2070 Wireless antenna assembly” on page 96 Chapter 8 Removing or replacing a FRU...
  • Page 106 T490 Hardware Maintenance Manual...

  • Page 107: Appendix A. Notices

    Lenovo representative for information on the products and services currently available in your area. Any reference to a Lenovo product, program, or service is not intended to state or imply that only that Lenovo product, program, or service may be used. Any functionally equivalent product, program, or service that does not infringe any Lenovo intellectual property right may be used instead.
  • Page 108 EU Contact: Lenovo (Slovakia), Landererova 12, 811 09 Bratislava, Slovakia Trademarks LENOVO, LENOVO logo, THINKPAD, THINKPAD logo and TRACKPOINT are trademarks of Lenovo. Microsoft and Windows are trademarks of the Microsoft group of companies. Intel and Optane are trademarks of Intel Corporation or its subsidiaries in the U.S. and/or other countries. The terms HDMI and HDMI High-Definition Multimedia Interface are trademarks or registered trademarks of HDMI Licensing LLC in the United States and other countries.

  • Page 109: Appendix B. Abbreviation And Acronym Table

    HDMI high-definition multimedia interface integrated circuits ICCID integrate circuit card identity International Standardization Organization local area network liquid crystal display media access control MIMO multiple-input and multiple-output machine type machine type and model personal computer © Copyright Lenovo 2019...
  • Page 110 Abbreviation Term Platform Controller Hub POST power-on self-test random-access memory radio frequency RFID radio-frequency identification ring indicator registered jack SATA Serial Advanced Technology Attachment subscriber identity module supervisor password TFTs thin-film transistors UEFI Unified Extensible Firmware Interface Universal Serial Bus UUID universally unique identifier video graphics array...
  • Page 112 Part Number: SP40G76793 Printed in China (1P) P/N: SP40G76793...
  • Page 113 *1PSP40G76793*...

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