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Lenovo ThinkPad L390 Hardware Maintenance Manual
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Lenovo ThinkPad L390 Hardware Maintenance Manual

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L390, L390 Yoga, S2 4th Gen, and S2 Yoga
4th Gen
Hardware Maintenance Manual

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Summary of Contents for Lenovo ThinkPad L390

  • Page 1 L390, L390 Yoga, S2 4th Gen, and S2 Yoga 4th Gen Hardware Maintenance Manual...

  • Page 2: Table Of Contents

    Power-on password ... 1030 Keyboard ....Hard disk password ... © Copyright Lenovo 2018...
  • Page 3 1030 Base cover assembly ..LCD FRUs for Yoga models ..1040 Memory module ... . 2010 Strip cover and rubber caps .

  • Page 4: About This Manual

    About this manual ® This manual contains service and reference information for the following ThinkPad product: ThinkPad L390 Yoga Machine types: 20NT, 20NU ThinkPad L390 Machine types: 20NR, 20NS ThinkPad S2 Yoga 4th Gen Machine type: 20NW ThinkPad S2 4th Gen Machine type: 20NV Use this manual along with the advanced diagnostic tests to troubleshoot problems.

  • Page 5: 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 2018...
  • Page 6 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 7: 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 8: 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 9 DANGER DANGER DANGER DANGER DANGER DANGER Chapter 1 Safety information...
  • Page 10 PERIGO PERIGO PERIGO PERIGO L390, L390 Yoga, S2 4th Gen, and S2 Yoga 4th Gen Hardware Maintenance Manual...
  • Page 11 PERIGO PERIGO PERIGO DANGER DANGER Chapter 1 Safety information...
  • Page 12 DANGER DANGER DANGER DANGER DANGER L390, L390 Yoga, S2 4th Gen, and S2 Yoga 4th Gen Hardware Maintenance Manual...
  • Page 13 DANGER VORSICHT VORSICHT VORSICHT VORSICHT Chapter 1 Safety information...
  • Page 14 VORSICHT VORSICHT VORSICHT VORSICHT L390, L390 Yoga, S2 4th Gen, and S2 Yoga 4th Gen Hardware Maintenance Manual...
  • Page 15 Chapter 1 Safety information...

  • Page 16: Chapter 2. Important Service Information

    UEFI BIOS downloads. Telephone numbers for Lenovo Support are available at: https://pcsupport.lenovo.com/supportphonelist • System disassembly and reassembly videos that show the FRU removal or replacement procedures for the Lenovo authorized service technicians are available at: http://www.lenovoservicetraining.com/ion/ Strategy for replacing FRUs Before replacing parts: Ensure that all software fixes, drivers, and UEFI BIOS downloads are installed before you replace any FRUs listed in this manual.

  • Page 17: 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 18: Fru Identification

    FRU identification Use Lenovo eSupport to identify major FRUs, FRU part numbers, and FRU descriptions for a product at an MT - serial number level. Examples of major FRUs are hard disk drive, system board, and liquid crystal display (LCD).

  • Page 19: 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 2018...

  • Page 20: 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 21: Quick Test Programs

    Quick test programs Run quick test programs to troubleshoot and resolve computer problems, especially when the computer does not have the Lenovo Solution center installed. To download and install a quick test program, go to https://www.lenovo.com/diags , and follow the instructions on the Web site.

  • Page 22: Bootable Diagnostic 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 devices, the LCD, and system board buses.

  • Page 23: 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 24: Checking The Coin-Cell Battery

    To check the battery pack, do the following: 1. Power off the computer. 2. Remove the battery pack and measure the voltage between battery terminals 1 (+) and 7 (-). See the following figure: Terminal Voltage (V dc) 1, 2 + 0 to + 12.6 6, 7 Ground (-)

  • Page 25: 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 desired startup option, then follow the instructions on the screen. © Copyright Lenovo 2018...

  • Page 26: 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 27: Power-On Password

    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 28: How To Remove The Hard Disk 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 29: Hibernation Mode

    • The LCD is powered off. • The hard disk drive or solid-state drive is powered off. • The microprocessor stops. To put your computer into sleep mode, do the following: • Open the Start menu, click Power, and then click Sleep. In certain circumstances, the computer goes into sleep mode automatically: •...

  • Page 30: Numeric Error Codes

    • “LCD-related symptoms” on page 40 • “Intermittent problems” on page 40 • “Undetermined problems” on page 41 The symptom-to-FRU index in this section lists symptoms and errors and their possible causes. The most likely cause is listed first, in boldface type. Note: Do the FRU replacement or other actions in the sequence shown in the column headed “FRU or action, in sequence.”...
  • Page 31 Table 2. Numeric error codes (continued) Symptom or error (beeps, if any) FRU or action, in sequence 0251 1. Charge the coin-cell battery for more than 8 hours System CMOS checksum bad - Default configuration by connecting the ac power adapter. used.

  • Page 32: 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 33: 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 the emergency-reset hole, insert a straightened paper clip into the emergency-reset hole.

  • Page 34: 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 35: Undetermined Problems

    Undetermined problems If the diagnostic tests did not identify the device that has failed, if wrong devices are installed, or if the system simply is not operating, follow these procedures to isolate the failing FRU (do not isolate FRUs that have no defects).

  • Page 36: Chapter 5. Special Keys

    Mutes or unmutes the microphones. Darkens the display. Brightens the display. Manage external displays. Enables or disables the built-in wireless networking features. Open the Settings window. Enable or disable the built-in Bluetooth features. Open a keyboard setting page. © Copyright Lenovo 2018...
  • Page 37 Invoke the function defined by yourself. To define or change the action for the F12 key, do the following: 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 38: Chapter 6. Locations

    This chapter introduces the locations of the hardware components on your computer. Locating computer controls, connectors, and indicators This topic introduces the locations of the computer controls, connectors, and indicators. Front ThinkPad L390 Yoga™ and ThinkPad S2 Yoga 4th Gen Microphones Infrared camera (available on some models) Front camera...

  • Page 39: Base

    Front camera Microphones Multi-touch screen (available on some models) Base Fingerprint reader* Trackpad ® NFC mark* TrackPoint pointing device Rear camera* * for selected models Left-side view Pen tether hole USB-C™ connectors Always On USB 3.1 connector Gen 1 HDMI™ connector L390, L390 Yoga, S2 4th Gen, and S2 Yoga 4th Gen Hardware Maintenance Manual...

  • Page 40: Right-Side View

    Right-side view Pen slot Power button Audio connector microSD card slot USB 3.1 connector Gen 1 Mini Ethernet connector Security-lock slot Pen tether hole Bottom view Emergency-reset hole Speakers Locating FRUs and CRUs This topic introduces the following service parts: •...

  • Page 41: Major Frus And Crus

    Major FRUs and CRUs Chapter 6 Locations...
  • Page 42 Short M.2 solid-state drive* M.2 solid-state drive bracket* HDMI connector bracket Wireless LAN card Memory module Trackpad Trackpad cable TrackPoint cap Lenovo factory recovery USB key L390, L390 Yoga, S2 4th Gen, and S2 Yoga 4th Gen Hardware Maintenance Manual...

  • Page 43: Lcd Frus And Crus

    • for selected models. • 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 44 Table 8. LCD FRUs and CRUs FRU description Self-service CRU Optional-service CRU Rubber caps Strip cover Touch module assembly Infrared camera Sensor board Infrared camera/microphone module cable Sensor board cable ThinkPad-logo-LED card with cable RGB camera/microphone module RGB camera/microphone module cable LCD rear cover assembly Hinge rubber LCD hinges...
  • Page 45 For non-Yoga models Table 9. LCD FRUs and CRUs FRU description Self-service CRU Optional-service CRU LCD bezel LCD panel RGB camera/microphone module RGB camera/microphone module/ThinkPad- logo-LED card cable LCD rear cover assembly LCD hinges LCD cable Chapter 6 Locations...

  • Page 46: Miscellaneous Parts

    Keyboard removal tool 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 and CRUs” on page 51.
  • Page 47 Table 11. System board connector and cable guide Item Internal cable required Connector (location) Cable connection Sensor board connector Sensor board connector cable Connect one end to the sensor board and the other end to this connector. Insert the wireless-LAN card into Wireless-LAN card slot (internal) this slot.
  • Page 48 Table 11. System board connector and cable guide (continued) Item Internal cable required Connector (location) Cable connection Audio connector (external) Connect headphones or a headset with 3.5-mm (0.14-inch) 4-pole plug to this connector. USB 3.1 connector Gen 1 Connect USB 3.1-compatible devices to this connector.
  • Page 49 Trackpad connector and cable Table 13. Trackpad connector Item Connector (location) Internal cable required Cable connection Trackpad connector (internal) Trackpad cable Connect one end to the trackpad connector on the system board and the other end to this connector. Power button board connector and cable Table 14.
  • Page 50 Table 16. RGB camera/microphone module connector Item Connector (location) Internal cable required Cable connection RGB camera/microphone module RGB camera/microphone module Connect one end to the RGB connector (internal) cable camera/microphone module connector on the system board and the other end to this connector.
  • Page 51 LCD panel connector (for non-Yoga models only) Table 20. LCD panel Item Internal cable required Connector (location) Cable connection LCD panel connector (internal) LCD cable Connect one end to the LCD connector on the system board and the other end to this connector.

  • Page 52: Looking Up Fru Information

    Connect the cable to this connector. Looking up FRU information For detailed FRU information, including part numbers, descriptions, and substitution part numbers, go to: https://support.lenovo.com/partslookup L390, L390 Yoga, S2 4th Gen, and S2 Yoga 4th Gen Hardware Maintenance Manual...

  • Page 53: 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 54: Screw Notices

    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 55: Restoring The Serial Number Of The System Unit

    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 56 Maintenance key. Note: Only an authorized Lenovo service technician can access the above Web site. 3. Restart the computer. 4. When the logo screen is displayed, press Esc. The ThinkPad Config Information Update Utility interface is displayed.

  • Page 57: 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 58: Disabling The Built-In Battery

    Disabling the built-in battery Before replacing any RU, ensure that you disable Fast Startup first and then disable the built-in battery. To disable Fast Startup, do the following: 1. Go to Control Panel, and then change the view of Control Panel from Category to Large icons or Small icons.

This manual is also suitable for:

Thinkpad l390 yogaThinkpad s2 4th genThinkpad s2 yoga 4th gen

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