Product name Machine type (MT) ThinkPad L13 Gen 4 Machine types (MT): 21FG, 21FH, 21FN and 21FQ ThinkPad L13 Yoga Gen 4 Machine types (MT): 21FJ, 21FK, 21FR and 21FC ThinkPad S2 Gen 8 Machine types (MT): 21FL and 21FT...
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L13 Gen 4, L13 Yoga Gen 4, S2 Gen 8, and S2 Yoga Gen 8 Hardware Maintenance Manual...
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• If an electrical accident occurs: – Use caution; do not become a victim yourself. – Switch off power. – Send another person to get medical aid. L13 Gen 4, L13 Yoga Gen 4, S2 Gen 8, and S2 Yoga Gen 8 Hardware Maintenance Manual...
4. Check for cracked or bulging batteries. 5. Remove the cover. 6. Check for any obvious non-ThinkPad / non-Lenovo alterations. Use good judgment as to the safety of any non-ThinkPad / non-Lenovo alterations. 7. Check inside the unit for any obvious unsafe conditions, such as metal filings, contamination, water or other liquids, or signs of fire or smoke damage.
• Arabic • Brazilian Portuguese • French • German • Hebrew • Japanese • Korean • Spanish • Traditional Chinese DANGER DANGER L13 Gen 4, L13 Yoga Gen 4, S2 Gen 8, and S2 Yoga Gen 8 Hardware Maintenance Manual...
– “FRU identification” on page 20 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...
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.
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.
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...
• “Checking the ac power adapter” on page 25 • “Checking the built-in battery and operational charging” on page 25 • “Checking the coin-cell battery” on page 25 L13 Gen 4, L13 Yoga Gen 4, S2 Gen 8, and S2 Yoga Gen 8 Hardware Maintenance Manual...
Checking the built-in battery and operational charging This system supports only batteries specially designed for this specific system and manufactured by Lenovo or an authorized manufacturer. The system does not support unauthorized batteries or batteries designed for other systems.
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• If the voltage is not correct, replace the coin-cell battery. • If the coin-cell battery discharges quickly after replacement, replace the system board. L13 Gen 4, L13 Yoga Gen 4, S2 Gen 8, and S2 Yoga Gen 8 Hardware Maintenance Manual...
When the latest maintenance diskette and the system program service diskette become available, they will be posted on: https://support.lenovo.com Reset or restore Windows To reset or restore Windows, refer to the information below: • Use Lenovo recovery options. 1. Go to https://support.lenovo.com/HowToCreateLenovoRecovery 2. Follow the on-screen instructions. • Use Window recovery options.
To customize the authority of the system management password through the UEFI BIOS menu: 1. Enter the UEFI BIOS menu. L13 Gen 4, L13 Yoga Gen 4, S2 Gen 8, and S2 Yoga Gen 8 Hardware Maintenance Manual...
Lenovo cannot reset your passwords or recover data from the storage drive. You can contact a Lenovo authorized service provider to have the storage drive replaced. A fee will be charged for parts and service. If the storage drive is a CRU (Customer Replaceable Unit), you can also contact Lenovo to purchase a new storage drive to replace the old one by yourself.
• The ring indicator (RI) is signaled by a serial device or a PC Card device. • The time set on the resume timer elapses. L13 Gen 4, L13 Yoga Gen 4, S2 Gen 8, and S2 Yoga Gen 8 Hardware Maintenance Manual...
Note: The computer does not accept any input immediately after it enters sleep mode. Wait a few seconds before taking any action to reenter operation mode. Hibernation mode In hibernation mode, the following occurs: • The system status, RAM, VRAM, and setup data are stored on the solid-state drive. •...
3. Replace the system board. 2200 Have the computer serviced. Machine Type and Serial Number are invalid. 2201 Replace the system board. Machine UUID is invalid L13 Gen 4, L13 Yoga Gen 4, S2 Gen 8, and S2 Yoga Gen 8 Hardware Maintenance Manual...
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.
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Replace the system board (service provider only). the TPM initialization failure) 0286: Integrated graphics error Replace the system board (service provider only). L13 Gen 4, L13 Yoga Gen 4, S2 Gen 8, and S2 Yoga Gen 8 Hardware Maintenance Manual...
Error codes Solutions 0287: Discrete graphics error 1. Reinstall or replace the discrete graphics card (service provider only). 2. If step 1 does not work, replace the system board (service provider only). 1. Reconnect the display cable on both the system board side and the computer display side (service provider only) and check the LCD panel.
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.
Table 4. 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. •...
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Send system request Enter sleep mode To wake up the computer, press Fn or the power button. Go to beginning Go to end L13 Gen 4, L13 Yoga Gen 4, S2 Gen 8, and S2 Yoga Gen 8 Hardware Maintenance Manual...
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Power button with fingerprint reader TrackPoint pointing stick NFC (near field communication) mark TrackPoint buttons Trackpad Smart-card slot * for selected models L13 Gen 4, L13 Yoga Gen 4, S2 Gen 8, and S2 Yoga Gen 8 Hardware Maintenance Manual...
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. 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 .
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M.2 2280 solid-state drive* M.2 2242 solid-state drive* Wireless WAN card* World facing camera cable* World facing camera Left I/O bracket SIM card tray* L13 Gen 4, L13 Yoga Gen 4, S2 Gen 8, and S2 Yoga Gen 8 Hardware Maintenance Manual...
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Notes: • Depending on the computer model, your computer might look different from the illustration above. • 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/...
LCD bezel LCD panel LCD hinges Camera-and-microphone-module cable* LCD cover assembly LCD cable Webcam privacy shutter Camera and microphone module(IR camera*/RGB camera*) L13 Gen 4, L13 Yoga Gen 4, S2 Gen 8, and S2 Yoga Gen 8 Hardware Maintenance Manual...
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Table 6. LCD FRUs and CRUs (continued) FRU description Self-service Optional-service Microphone rubbers Sensor board Elastic adhesive tapes Miscellaneous parts kits (camera sponge, LCD EMI gasket and sponge) * for selected models Note: Depending on the computer model, your computer might look different from the illustration above. For Yoga models Chapter 6 Locations...
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Miscellaneous parts kits (camera sponge, LCD EMI gasket and sponge) * for selected models Note: Depending on the computer model, your computer might look different from the illustration above. L13 Gen 4, L13 Yoga Gen 4, S2 Gen 8, and S2 Yoga Gen 8 Hardware Maintenance Manual...
• 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 47 and “LCD FRUs and CRUs” on page 50.
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Connect the cable to this connector. Trackpad cable connector (internal) Trackpad cable Connect one end to the trackpad and the other end to this connector. L13 Gen 4, L13 Yoga Gen 4, S2 Gen 8, and S2 Yoga Gen 8 Hardware Maintenance Manual...
USB-C (3.2 Gen 2) connector Connect USB-C compatible (external) devices to this connector. * for selceted models 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...
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5. Lay down the computer with the LCD panel facing up as shown and then follow the on-screen instructions to start the calibration process. L13 Gen 4, L13 Yoga Gen 4, S2 Gen 8, and S2 Yoga Gen 8 Hardware Maintenance Manual...
1. Connect a USB memory key to the computer. 2. Go to and follow the instructions on the screen to create a https://www.lenovo.com/maintenanceutilities Maintenance Key. Note: Only an authorized Lenovo service technician can access the above Web site. 3. Restart the computer. Chapter 7 FRU replacement notices...
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. L13 Gen 4, L13 Yoga Gen 4, S2 Gen 8, and S2 Yoga Gen 8 Hardware Maintenance Manual...
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1. Insert the latest version of LENOVO ThinkPad Hardware Maintenance Diskette or Maintenance Key, and then restart the computer. 2. From the main menu, select 6. Set ECA Information. 3. To read the ECA information, select 2. Read ECA/rework number from EEPROM and follow the instructions on the screen.
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The ThinkPad Pen Pro is stored in the slot on the bottom side of the computer. To remove the pen from the slot, slide the tab of the pen a little bit out, and then completely pull out the pen. L13 Gen 4, L13 Yoga Gen 4, S2 Gen 8, and S2 Yoga Gen 8 Hardware Maintenance Manual...
1020 Base cover assembly For access, remove this FRU: • “1010 ThinkPad Pen Pro (for ThinkPad L13 Yoga Gen 4 and ThinkPad S2 Yoga Gen 8 only)” on page 64 Removal step of the base cover assembly Step Screw (quantity)
The only exception to this is if the built-in battery is physically damaged or a customer is reporting a possible safety issue. L13 Gen 4, L13 Yoga Gen 4, S2 Gen 8, and S2 Yoga Gen 8 Hardware Maintenance Manual...
For access, remove these FRUs in order: • “1010 ThinkPad Pen Pro (for ThinkPad L13 Yoga Gen 4 and ThinkPad S2 Yoga Gen 8 only)” on page 64 • “1020 Base cover assembly” on page 65...
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M2 × 2.5 mm, flat-head, nylon-coated (1) Black 0.181 Nm (1.85 kgf-cm) Black 0.181 Nm M2 × 5 mm, flat-head, nylon-coated (1) (1.85 kgf-cm) L13 Gen 4, L13 Yoga Gen 4, S2 Gen 8, and S2 Yoga Gen 8 Hardware Maintenance Manual...
1050 M.2 solid-state drive, bracket, and thermal pad For access, remove these FRUs: • “1010 ThinkPad Pen Pro (for ThinkPad L13 Yoga Gen 4 and ThinkPad S2 Yoga Gen 8 only)” on page 64 • “1020 Base cover assembly” on page 65 Attention: The M.2 solid-state drive is sensitive.
1060 Wireless WAN card (for selected models) For access, remove these FRUs: • “1010 ThinkPad Pen Pro (for ThinkPad L13 Yoga Gen 4 and ThinkPad S2 Yoga Gen 8 only)” on page 64 • “1020 Base cover assembly” on page 65...
1070 Thermal fan and heatsink assembly For access, remove these FRUs: • “1010 ThinkPad Pen Pro (for ThinkPad L13 Yoga Gen 4 and ThinkPad S2 Yoga Gen 8 only)” on page 64 • “1020 Base cover assembly” on page 65...
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M2 × 2 mm, flat-head, nylon-coated (1) Silver (1.85 kgf-cm) Step Screw (quantity) Color Torque M2 × 4 mm, flat-head, nylon-coated (1) Black 0.181 Nm (1.85 kgf-cm) L13 Gen 4, L13 Yoga Gen 4, S2 Gen 8, and S2 Yoga Gen 8 Hardware Maintenance Manual...
1080 I/O connectors brackets For access, remove these FRUs in order: • “1010 ThinkPad Pen Pro (for ThinkPad L13 Yoga Gen 4 and ThinkPad S2 Yoga Gen 8 only)” on page 64 • “1020 Base cover assembly” on page 65...
1100 Speaker assembly For access, remove these FRUs: • “1010 ThinkPad Pen Pro (for ThinkPad L13 Yoga Gen 4 and ThinkPad S2 Yoga Gen 8 only)” on page 64 • “1020 Base cover assembly” on page 65 • “1030 Built-in battery” on page 66...
For access, remove these FRUs in order: • “1010 ThinkPad Pen Pro (for ThinkPad L13 Yoga Gen 4 and ThinkPad S2 Yoga Gen 8 only)” on page 64 • “1020 Base cover assembly” on page 65 • “1030 Built-in battery” on page 66...
1120 Trackpad and trackpad cable For access, remove these FRUs in order: • “1010 ThinkPad Pen Pro (for ThinkPad L13 Yoga Gen 4 and ThinkPad S2 Yoga Gen 8 only)” on page 64 • “1020 Base cover assembly” on page 65 •...
Torque Step Screw (quantity) Color M2 × L2 mm, flat-head, nylon-coated (7) Silver 0.181 Nm (1.85 kgf-cm) Notes: • A mylar might cover the trackpad, and ensure that you attach the mylar to the trackpad after replacement. • Ensure that the connector is attached firmly. 1130 NFC module with cable and trackpad-nfc cable (for selected models) For access, remove these FRUs in order:...
• “1010 ThinkPad Pen Pro (for ThinkPad L13 Yoga Gen 4 and ThinkPad S2 Yoga Gen 8 only)” on page 64 • “1020 Base cover assembly” on page 65 • “1030 Built-in battery” on page 66 Removal steps of the NFC module with cable and trackpad-nfc cable...
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Removal steps of the smart card reader Torque Step Screw (quantity) Color M2 × 2 mm, flat-head, nylon-coated (1) Silver 0.181 Nm (1.85 kgf-cm) Chapter 8 Removing or replacing a FRU...
ThinkPad S2 Yoga Gen 8 only) For access, remove these FRUs in order: • “1010 ThinkPad Pen Pro (for ThinkPad L13 Yoga Gen 4 and ThinkPad S2 Yoga Gen 8 only)” on page 64 • “1020 Base cover assembly” on page 65 •...
1170 P-sensor cable For access, remove these FRUs in order: • “1010 ThinkPad Pen Pro (for ThinkPad L13 Yoga Gen 4 and ThinkPad S2 Yoga Gen 8 only)” on page 64 • “1020 Base cover assembly” on page 65 • “1030 Built-in battery” on page 66 •...
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For access, remove these FRUs in order: • “1010 ThinkPad Pen Pro (for ThinkPad L13 Yoga Gen 4 and ThinkPad S2 Yoga Gen 8 only)” on page 64 • “1020 Base cover assembly” on page 65 • “1030 Built-in battery” on page 66 •...
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Removal steps of the system board Chapter 8 Removing or replacing a FRU...
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When installing: Configure the keyboard language in UEFI BIOS: 1. Enter the UEFI BIOS menu. 2. Click Config ➙ Keyboard/Mouse ➙ Keyboard Layout, and then select the keyboard language. L13 Gen 4, L13 Yoga Gen 4, S2 Gen 8, and S2 Yoga Gen 8 Hardware Maintenance Manual...
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Foil and mylar locations Note: After replacing the system board or keyboard bezel assembly, apply foil and mylar to the correct locations. • For Wireless LAN models – Non-Yoga models (AMD Platform) Keyboard bezel assembly: System board: install the mylar no Al foil –...
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System board: – install the keyboard left mylar – install the CU foil no Al foil – install the keyboard right mylar L13 Gen 4, L13 Yoga Gen 4, S2 Gen 8, and S2 Yoga Gen 8 Hardware Maintenance Manual...
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• For Wireless WAN models – Non-Yoga models (AMD Platform) Keyboard bezel assembly: System board: no mylar install Al foil – Non-Yoga models (Intel Platform) Keyboard bezel assembly: System board: no mylar install Al foil Chapter 8 Removing or replacing a FRU...
1190 World facing camera and camera cable For access, remove these FRUs in order: • “1010 ThinkPad Pen Pro (for ThinkPad L13 Yoga Gen 4 and ThinkPad S2 Yoga Gen 8 only)” on page 64 • “1020 Base cover assembly” on page 65 •...
1200 Power button with or without fingerprint reader For access, remove these FRUs in order: • “1010 ThinkPad Pen Pro (for ThinkPad L13 Yoga Gen 4 and ThinkPad S2 Yoga Gen 8 only)” on page 64 • “1020 Base cover assembly” on page 65 •...
1210 LCD unit For access, remove these FRUs in order: • “1010 ThinkPad Pen Pro (for ThinkPad L13 Yoga Gen 4 and ThinkPad S2 Yoga Gen 8 only)” on page 64 • “1020 Base cover assembly” on page 65 Removal steps of the LCD unit...
1220 Keyboard bezel assembly For access, remove these FRUs: • “1010 ThinkPad Pen Pro (for ThinkPad L13 Yoga Gen 4 and ThinkPad S2 Yoga Gen 8 only)” on page 64 • “1020 Base cover assembly” on page 65 • “1030 Built-in battery” on page 66 •...
• “1020 Base cover assembly” on page 65 • “1210 LCD unit” on page 90 • “2010 LCD bezel” on page 92 L13 Gen 4, L13 Yoga Gen 4, S2 Gen 8, and S2 Yoga Gen 8 Hardware Maintenance Manual...
Removal steps of LCD panel 2030 LCD hinges For access, remove these FRUs in order: • “1020 Base cover assembly” on page 65 • “1210 LCD unit” on page 90 • “2010 LCD bezel” on page 92 Removal steps of the LCD hinges Chapter 8 Removing or replacing a FRU...
• “2020 LCD panel” on page 92 Removal steps of the webcam privacy shutter 2060 Camera-and-microphone cable and sensor board cable For access, remove these FRUs in order: L13 Gen 4, L13 Yoga Gen 4, S2 Gen 8, and S2 Yoga Gen 8 Hardware Maintenance Manual...
• “1020 Base cover assembly” on page 65 • “1210 LCD unit” on page 90 • “2010 LCD bezel” on page 92 • “2020 LCD panel” on page 92 Removal steps of the camera-and-microphone cable and sensor board cable 2070 Microphone rubber and camera-and-microphone module For access, remove these FRUs in order: •...
• “2080 Sensor board” on page 96 LCD FRUs for Yoga models This chapter provides information about replacement of LCD FRUs for Yoga models. L13 Gen 4, L13 Yoga Gen 4, S2 Gen 8, and S2 Yoga Gen 8 Hardware Maintenance Manual...
3010 Strip cover, rubber caps and hinge rubbers For access, remove these FRUs in order: • “1010 ThinkPad Pen Pro (for ThinkPad L13 Yoga Gen 4 and ThinkPad S2 Yoga Gen 8 only)” on page 64 • “1020 Base cover assembly” on page 65 •...
3020 LCD panel For access, remove these FRUs in order: • “1010 ThinkPad Pen Pro (for ThinkPad L13 Yoga Gen 4 and ThinkPad S2 Yoga Gen 8 only)” on page 64 • “1020 Base cover assembly” on page 65 • “1210 LCD unit” on page 90 •...
3030 LCD hinges For access, remove these FRUs in order: • “1010 ThinkPad Pen Pro (for ThinkPad L13 Yoga Gen 4 and ThinkPad S2 Yoga Gen 8 only)” on page 64 • “1020 Base cover assembly” on page 65 • “1210 LCD unit” on page 90 •...
3050 Webcam privacy shutter For access, remove these FRUs in order: • “1010 ThinkPad Pen Pro (for ThinkPad L13 Yoga Gen 4 and ThinkPad S2 Yoga Gen 8 only)” on page 64 • “1020 Base cover assembly” on page 65 •...
3070 Microphone rubber and camera-and-microphone module For access, remove these FRUs in order: • “1010 ThinkPad Pen Pro (for ThinkPad L13 Yoga Gen 4 and ThinkPad S2 Yoga Gen 8 only)” on page 64 • “1020 Base cover assembly” on page 65 •...
3080 Sensor board For access, remove these FRUs in order: • “1010 ThinkPad Pen Pro (for ThinkPad L13 Yoga Gen 4 and ThinkPad S2 Yoga Gen 8 only)” on page 64 • “1020 Base cover assembly” on page 65 • “1210 LCD unit” on page 90 •...
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.
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Licensing LLC in the United States and other countries. USB-C is a registered trademark of USB Implementers Forum. Wi-Fi is the registered trademark of Wi-Fi Alliance. All other trademarks are the property of their respective owners. L13 Gen 4, L13 Yoga Gen 4, S2 Gen 8, and S2 Yoga Gen 8 Hardware Maintenance Manual...
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