Lenovo ThinkPad T490s Hardware Maintenance Manual
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Lenovo ThinkPad T490s Hardware Maintenance Manual

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T490s and X390
Hardware Maintenance Manual

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Summary of Contents for Lenovo ThinkPad T490s

  • Page 1 T490s and X390 Hardware Maintenance Manual...
  • Page 2 Appendix A “Notices” on page 107. First Edition (March 2019) © Copyright Lenovo 2019. 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-...

  • Page 3: Table Of Contents

    Hard disk password ... card tray ....Supervisor password ... © Copyright Lenovo 2019...
  • Page 4 1100 Trackpad cable... . . aluminum foil (for ThinkPad T490s only) ..100 1110 Trackpad ....

  • 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 T490s and X390 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 T490s and X390 Hardware Maintenance Manual...
  • Page 13 PERIGO Chapter 1 Safety information...
  • Page 14 PERIGO PERIGO PERIGO PERIGO T490s and X390 Hardware Maintenance Manual...
  • Page 15 PERIGO PERIGO PERIGO DANGER DANGER Chapter 1 Safety information...
  • Page 16 DANGER DANGER DANGER DANGER DANGER T490s and X390 Hardware Maintenance Manual...
  • Page 17 DANGER VORSICHT VORSICHT VORSICHT VORSICHT Chapter 1 Safety information...
  • Page 18 VORSICHT VORSICHT VORSICHT VORSICHT T490s and X390 Hardware Maintenance Manual...
  • Page 19 Chapter 1 Safety information...
  • Page 20 T490s and X390 Hardware Maintenance Manual...
  • Page 21 Chapter 1 Safety information...
  • Page 22 T490s and X390 Hardware Maintenance Manual...
  • Page 23 Chapter 1 Safety information...
  • Page 24 T490s and X390 Hardware Maintenance Manual...
  • Page 25 Chapter 1 Safety information...
  • Page 26 T490s and X390 Hardware Maintenance Manual...

  • Page 27: Chapter 2. Important Service Information

    – “FRU identification” on page 22 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 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. Chapter 2 Important service information...
  • Page 30 T490s and X390 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: © 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: Quick Test Programs

    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...

  • 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 Ac Power Adapter

    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. T490s and X390 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 solid-state 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 solid-state drive.

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

    The solid- state 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 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 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 37 • “Beep errors” on page 38 • “No-beep symptoms” on page 39 • “LCD-related symptoms” on page 40 • “Intermittent problems” on page 41 •...

  • Page 43: Error Messages

    Table 2. Numeric error codes (continued) Symptom or error 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: Beep Errors

    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: No-Beep Symptoms

    Error codes Solutions 0001: Reset error (platform reset not de-asserted) 1. Remove the ac power adapter and the removable battery if your computer has one. Then, reset the computer by doing one of the following: • For models with the emergency-reset hole, insert a straightened paper clip into the emergency-reset hole.

  • Page 46: Lcd-Related 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

    Intermittent problems Intermittent system hang problems can be due to a variety of causes that have nothing to do with a hardware defect, such as cosmic radiation, ESD, or software errors. FRU replacement should be considered only when a problem recurs. When analyzing an intermittent problem, do the following: 1.
  • Page 48 T490s and X390 Hardware Maintenance Manual...

  • Page 49: Chapter 5. Special Keys

    To choose whether to invoke the special function or standard function: 3. F1–F12 function keys 1. Go to Control Panel and view by Large icons or Small icons. 2. Click Keyboard or Lenovo - Keyboard Manager and select the option of your preference. © Copyright Lenovo 2019...
  • Page 50 Enable or disable the built-in Bluetooth features. Open a keyboard setting page. Invoke the function defined by yourself: 1. Open the Start menu and click Lenovo Vantage. 2. Click Hardware Settings and then click Input. 3. Locate the Keyboard: User-defined Key section and follow the on-screen instructions to complete the setting.
  • Page 51 Equal the ScrLK or Scroll Lock key on a conventional external keyboard. Fn+K Equal the Pause key on a conventional external keyboard. Fn+P Equal the SysRq key on a conventional external keyboard. Fn+S Put the computer to sleep mode. To wake up the computer, press Fn or the power Fn+4 button.
  • Page 52 T490s and X390 Hardware Maintenance Manual...

  • Page 53: Chapter 6. Locations

    Chapter 6. Locations Locating 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 54: Base

    Base ThinkPad T490s ThinkPad X390 1. Power button 4. NFC mark* ® 2. Fingerprint reader* 5. TrackPoint pointing device 3. Trackpad * for selected models T490s and X390 Hardware Maintenance Manual...

  • Page 55: Left

    Left 1. USB-C™ connector (USB 3.1 Gen 1) 5. USB 3.1 connector Gen 1 ™ 2. Thunderbolt 3 connector (USB-C) 6. HDMI™ connector 7. Audio connector 3. Ethernet extension connector Gen 2 4. Docking-station connector Right 1. Smart-card slot* 3. Security-lock slot 2.

  • Page 56: Rear

    Rear 1. System status indicator 2. Nano-SIM-card and microSD-card slot T490s and X390 Hardware Maintenance Manual...

  • Page 57: Bottom

    Bottom ThinkPad T490s ThinkPad X390 1. Docking-station hook holes 3. Speakers 2. Emergency-reset hole Locating FRUs and CRUs This topic introduces the following service parts: • “Major FRUs and CRUs” on page 52 • “LCD FRUs and CRUs” on page 58 •...

  • Page 58: Major Frus And Crus

    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 59 ThinkPad T490s Chapter 6 Locations...
  • Page 60 Thermal pad for M.2 2242 solid-state drive* System board Coin-cell battery M.2 2280 solid-state drive* Thermal pad for M.2 2280 solid-state drive* TrackPoint cap Nano-SIM-card and microSD-card tray Lenovo factory recovery USB key* Power cord T490s and X390 Hardware Maintenance Manual...
  • Page 61 Table 6. Major FRUs and CRUs (continued) FRU description Self-service Optional-service ac power adapter Miscellaneous parts kits (see “Miscellaneous parts” on page 60) * for selected models Chapter 6 Locations...
  • Page 62 ThinkPad X390 T490s and X390 Hardware Maintenance Manual...
  • Page 63 Thermal pad for M.2 2280 solid-state drive* Speaker assembly System board M.2 2242 solid-state drive bracket* M.2 2242 solid-state drive* Thermal pad for M.2 2242 solid-state drive* Coin-cell battery Nano-SIM-card and microSD-card tray Keyboard TrackPoint cap Lenovo factory recovery USB key* Power cord Chapter 6 Locations...

  • Page 64: Lcd Frus And Crus

    Table 7. Major FRUs and CRUs (continued) FRU description Self-service Optional-service ac power adapter Miscellaneous parts kits (see “Miscellaneous parts” on page 60) * for selected models LCD FRUs and CRUs T490s and X390 Hardware Maintenance Manual...
  • Page 65 Self-service Optional-service LCD bezel cover LCD bezel LCD cable Camera and microphone module Aluminum foil (for ThinkPad T490s only) LCD panel Antenna kit LCD hinges Camera-and-microphone-module cable* LCD cover assembly * Depending on the computer model, the cable might look different from the illustration above. For more information about the cable types, see “2050 Camera-and-microphone-module cable and antenna kit”...

  • Page 66: Miscellaneous Parts

    • Spec 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 52 and “LCD FRUs and CRUs” on page 58.
  • Page 67 System board connectors and cables Table 10. System board connector and cable guide Connector/feature Internal cable required Cable connection dc-in connector (internal) dc-in cable Connect one end to the power card and the other end to this connector. Camera connector (internal) camera-and-microphone-module Connect one end to the camera cable...
  • Page 68 Table 10. System board connector and cable guide (continued) Internal cable required Connector/feature Cable connection Connect a USB-C compatible or Thunderbolt 3 connector (USB-C) (external) Thunderbolt 3 compatible device to this connector. Ethernet extension connector Gen This connector does not work 2 (external) individually.

  • Page 69: Looking Up Fru Information

    Keyboard assembly cables The keyboard assembly comes X390 (internal) with the cables. Connect the cables to these connectors. 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 70 T490s and X390 Hardware Maintenance Manual...

  • Page 71: Chapter 7. Fru Replacement Notices

    • Ensure that you use the correct screw. It is recommended to use new screws for replacements. If you have a torque screwdriver, tighten all screws firmly to the torque specified in the screw information table for each step. • Ensure torque screwdrivers are calibrated correctly following country specifications. © Copyright Lenovo 2019...

  • Page 72: Retaining Serial Numbers

    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 73: Reading Or Writing The Eca Information

    To check what ECAs have been previously applied to the machine, use the ECA Information Read/Write function on the LENOVO ThinkPad Hardware Maintenance Diskette or Maintenance Key. 1. Insert the latest version of LENOVO ThinkPad Hardware Maintenance Diskette or Maintenance Key, and then restart the computer.
  • Page 74 T490s and X390 Hardware Maintenance Manual...

  • Page 75: Chapter 8. Removing Or Replacing A Fru

    2. Click Power Options, and then click Choose what the power buttons do on the left pane. 3. Click Change settings that are currently unavailable at the top. 4. If prompted by User Account Control (UAC), click Yes. © Copyright Lenovo 2019...

  • Page 76: Removing The Nano-Sim-Card And Microsd-Card Tray

    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 T490s and X390 Hardware Maintenance Manual...
  • Page 77 Chapter 8 Removing or replacing a FRU...

  • Page 78: 1020 Base Cover Assembly

    When installing: Ensure that the connectors are attached firmly. 1020 Base cover assembly Removal steps T490s and X390 Hardware Maintenance Manual...

  • Page 79: 1030 M.2 Solid-State Drive, Bracket, And Thermal Pad

    For the labels that are not shipped with the new base cover assembly, peel them from the old base cover assembly, and adhere them to the new one. ThinkPad T490s ThinkPad X390 GEO and system label...
  • Page 80 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: • Replace the M.2 solid-state drive only for upgrade or repair. The M.2 solid-state drive is not designed for frequent changes or replacement.

  • Page 81: 1040 Wireless Wan Card

    Step Screw (quantity) Color Torque M2 × 2.2 mm, flat-head, nylon-coated (1) Black 0.181 Nm (1.85 kgf-cm) Removal steps of the short M.2 solid-state drive Step Screw (quantity) Color Torque Black 0.181 Nm M2 × 2.2 mm, flat-head, nylon-coated (2) (1.85 kgf-cm) 1040 Wireless WAN card For access, remove this FRU:...

  • Page 82: 1050 Docking-Station-Connector Bracket

    Removal steps Step Screw (quantity) Color Torque Black 0.181 Nm M2 × 2.2 mm, flat-head, nylon-coated (1) (1.85 kgf-cm) When installing: Plug the orange cable into the main connector, and the blue cable into the auxiliary connector on the card. 1050 Docking-station-connector bracket For access, remove this FRU: •...

  • Page 83: 1060 Thermal Fan Assembly

    When installing: Ensure that the two latches on the bracket are secured in place. 1060 Thermal fan assembly For access, remove this FRU: • “1020 Base cover assembly” on page 72 Removal steps When installing: • Ensure that the connector is attached firmly. •...
  • Page 84 Removal steps of the USB-card cable Removal steps of the USB card Step Screw (quantity) Color Torque M2 × 3 mm, flat-head, nylon-coated (2) Silver 0.181 Nm (1.85 kgf-cm) T490s and X390 Hardware Maintenance Manual...

  • Page 85: 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 86: Torque

    ThinkPad X390 Step Screw (quantity) Color Torque M2 × 4.5 mm, flat-head, nylon-coated (4) Black 0.181 Nm (1.85 kgf-cm) When installing: • Ensure that the connector is attached firmly. • Ensure that the base cover assembly is secured in place. Otherwise, the battery connection may fail. T490s and X390 Hardware Maintenance Manual...

  • Page 87: 1090 Coin-Cell Battery

    1090 Coin-cell battery DANGER Use only the authorized battery specified for the computer. Any other battery could ignite or explode. For access, remove these FRUs in order: • “1020 Base cover assembly” on page 72 • “1080 Built-in battery” on page 79 Removal steps When installing: Ensure that the connector is attached firmly.

  • Page 88: 1110 Trackpad

    Removal steps of trackpad cable (for NFC models) Removal steps of trackpad cable (for non-NFC model) When installing: Ensure that the connectors are attached firmly. 1110 Trackpad For access, remove these FRUs in order: • “1020 Base cover assembly” on page 72 •...
  • Page 89 Removal steps of trackpad (for NFC models) Table 11. Screw specification (ThinkPad T490s) Step Screw (quantity) Color Torque M2 × 2 mm, flat-head, nylon-coated (4) Black 0.181 Nm (1.85 kgf-cm) Table 12. Screw specification (ThinkPad X390) Step Screw (quantity) Color Torque M2 ×...

  • Page 90: 1120 Nfc Card

    Removal steps of trackpad (for non-NFC model) Table 13. Screw specification (ThinkPad T490s) Step Screw (quantity) Color Torque M2 × 2 mm, flat-head, nylon-coated (4) Black 0.181 Nm (1.85 kgf-cm) Table 14. Screw specification (ThinkPad X390) Step Screw (quantity) Color Torque M2 ×...

  • Page 91: 1130 Speaker Assembly

    1130 Speaker assembly For access, remove these FRUs in order: • “1020 Base cover assembly” on page 72 • “1080 Built-in battery” on page 79 Removal steps ThinkPad T490s Step Screw (quantity) Color Torque M2 x (2.2 + 2.4) mm, flat-head, nylon-coated (4) Black 0.181 Nm...
  • Page 92 ThinkPad X390 Step Screw (quantity) Color Torque M2 x (2.2 + 2.5) mm, flat-head, nylon-coated (4) Black 0.181 Nm (1.85 kgf-cm) When installing: • Ensure that the connector is attached firmly. T490s and X390 Hardware Maintenance Manual...

  • Page 93: 1140 Fingerprint-Reader-And-Smart-Card-Reader Cable, Fingerprint-Reader Cable, And Smart-Card-Reader Cable (For Thinkpad T490S Only)

    • Ensure that the cable is routed properly. 1140 Fingerprint-reader-and-smart-card-reader cable, fingerprint-reader cable, and smart-card-reader cable (for ThinkPad T490s only) For access, remove these FRUs in order: • “1020 Base cover assembly” on page 72 • “1080 Built-in battery” on page 79 ThinkPad T490s •...

  • Page 94: 1150 Fingerprint-Reader Bracket And Fingerprint Reader

    ThinkPad X390 • Removal steps of the fingerprint-reader-and-smart-card-reader cable Note: For models without fingerprint reader, skip step • Removal steps of the fingerprint-reader cable When installing: Ensure that the connectors are attached firmly. 1150 Fingerprint-reader bracket and fingerprint reader For access, remove these FRUs in order: T490s and X390 Hardware Maintenance Manual...

  • Page 95: 1160 Smart Card Reader Or Dummy Smart Card Reader

    • “1020 Base cover assembly” on page 72 • “1080 Built-in battery” on page 79 • “1140 Fingerprint-reader-and-smart-card-reader cable, fingerprint-reader cable, and smart-card-reader cable (for ThinkPad T490s only)” on page 87 Removal steps Torque Step Screw (quantity) Color M2 × 2.2 mm, flat-head, nylon-coated (1) Black 0.181 Nm...
  • Page 96 Removal steps of the dummy smart card reader Step Screw (quantity) Color Torque Black 0.181 Nm M2 × 2.2 mm, flat-head, nylon-coated (2) (1.85 kgf-cm) ThinkPad X390 Removal steps of the smart card reader Torque Step Screw (quantity) Color M2 × 2.2 mm, flat-head, nylon-coated (3) Black 0.181 Nm (1.85 kgf-cm)

  • Page 97: 1170 System Board

    • If you put a system board down, be sure to put it only on a padded surface such as an ESD mat or a corrugated conductive surface. ThinkPad T490s and ThinkPad X390 share a common system board. After replacing the system board, you will be prompted to input a brand name to correctly identify the machine type. The following table contains the brand name required to complete this step.
  • Page 98 ThinkPad T490s ThinkPad X390 • “1020 Base cover assembly” on page 72 • “1010 Keyboard (for ThinkPad X390 only)” on page 70 • “1030 M.2 solid-state drive, bracket, and thermal pad” • “1020 Base cover assembly” on page 72 on page 73 •...
  • Page 99 Step Screw (quantity) Color Torque M2 × 3 mm, flat head, nylon-coated (4) Silver 0.181 Nm (1.85 kgf-cm) M2 × 2.2 mm, flat head, nylon-coated (2) Black 0.181 Nm (1.85 kgf-cm) When installing: Ensure that the connectors are attached firmly. ThinkPad X390 Chapter 8 Removing or replacing a FRU...
  • Page 100 Step Screw (quantity) Color Torque M2 × 3 mm, flat head, nylon-coated (4) Silver 0.181 Nm (1.85 kgf-cm) M2 × 2.2 mm, flat head, nylon-coated (2) Black 0.181 Nm (1.85 kgf-cm) When installing: Ensure that the connectors are attached firmly. Attention: The Central Processing Unit (CPU) soldered on the top side of the system board is extremely sensitive.

  • Page 101: 1180 Power-Card Cable And Power Card

    • “1020 Base cover assembly” on page 72 Removal steps of the power card For access, remove these FRUs in order: ThinkPad T490s ThinkPad X390 • “1020 Base cover assembly” on page 72 • “1010 Keyboard (for ThinkPad X390 only)” on page 70 •...

  • Page 102: 1190 Lcd Unit

    When installing: Ensure that the connector is attached firmly. 1190 LCD unit For access, remove this FRU: • “1020 Base cover assembly” on page 72 Removal steps Table 15. Screw specification (ThinkPad T490s) Step Screw (quantity) Color Torque M 2.5 × 5 mm, flat-head, nylon-coated (6) Silver 0.294 Nm...
  • Page 103 Table 16. Screw specification (ThinkPad X390) Step Screw (quantity) Color Torque 0.294 Nm M 2.5 × 4.5 mm, flat-head, nylon-coated (6) Silver (3.0 kgf-cm) When installing: Ensure that the connectors are attached firmly. 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.

  • Page 104: 1200 Keyboard Assembly (For Thinkpad T490S) Or Keyboard Bezel Assembly (For Thinkpad X390)

    1200 Keyboard assembly (for ThinkPad T490s) or Keyboard bezel assembly (for ThinkPad X390) ThinkPad T490s ThinkPad X390 For access, remove these FRUs in order: For access, remove these FRUs in order: • “1020 Base cover assembly” on page 72 • “1010 Keyboard (for ThinkPad X390 only)” on page 70 •...

  • Page 105: 2020 Lcd Hinges

    • “1020 Base cover assembly” on page 72 • “1190 LCD unit” on page 96 • “2010 LCD bezel cover and LCD bezel” on page 98 Removal steps Table 17. Screw specification for ThinkPad T490s Step Screw (quantity) Color Torque M2.5 ×...

  • Page 106: 2030 Lcd Panel And Lcd Cable

    Table 18. Screw specification for ThinkPad X390 Step Screw (quantity) Color Torque Black 0.294 Nm M2.5 × 2.5 mm, flat-head, nylon-coated (4) (3.0 kgf-cm) 2030 LCD panel and LCD cable For access, remove these FRUs in order: • “1020 Base cover assembly” on page 72 •...

  • Page 107: 2050 Camera-And-Microphone-Module Cable And Antenna Kit

    For more information, see “2050 Camera-and- microphone-module cable and antenna kit” on page 101. Removal steps of the camera and microphone module and aluminum foil (for ThinkPad T490s only) Removal steps of the camera and microphone module...

  • Page 108: 2030 Lcd Panel And Lcd Cable

    • “2030 LCD panel and LCD cable” on page 100 T490s and X390 Hardware Maintenance Manual...
  • Page 109 Camera-and-microphone-module cable types Depending on the computer model, the camera-and-microphone-module cable might be one of the following types. ThinkPad T490s ThinkPad X390 For models with IR camera, microphone, and system For models with IR camera, microphone, and system status indicator...
  • Page 110 Removal steps of the camera-and-microphone-module cable Note: Depending on the type of the camera-and-microphone-module cable, the disconnection steps of the cable might be different from the following illustration. For models without camera, skip the disconnection steps of the cable. Removal steps of the antenna kit Attention: When you route the cables, ensure that they are not subject to any tension.

  • Page 111: 2060 Lcd Cover Assembly

    • “2020 LCD hinges” on page 99 • “2030 LCD panel and LCD cable” on page 100 • “2040 Camera and microphone module and aluminum foil (for ThinkPad T490s only)” on page 100 • “2050 Camera-and-microphone-module cable and antenna kit” on page 101...
  • Page 112 T490s and X390 Hardware Maintenance Manual...

  • Page 113: 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 114 EU Contact: Lenovo (Slovakia), Landererova 12, 811 09 Bratislava, Slovakia Trademarks LENOVO, LENOVO logo, THINKPAD, THINKPAD logo, and TRACKPOINT are trademarks of Lenovo. Intel Optane and Thunderbolt are trademarks of Intel Corporation or its subsidiaries in the U.S. and/or other countries.

  • Page 115: Appendix B. Abbreviation Table

    Electrically Erasable Programmable Read-Only Memory Extensible Firmware Interface Electrostatic discharge Field Replaceable Unit General Announce Variant Integrated circuits Liquid Crystal Display Machine type and model POST Power-on self-test RFID Radio-frequency identification Supervisor password UUID Universally unique identifier © Copyright Lenovo 2019...
  • Page 116 T490s and X390 Hardware Maintenance Manual...
  • Page 118 Part Number: SP40T09974 Printed in China (1P) P/N: SP40T09974 *1PSP40T09974*...

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