Lenovo 12SB0015PB Hardware Maintenance Manual
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Lenovo 12SB0015PB Hardware Maintenance Manual

Lenovo 12SB0015PB Hardware Maintenance Manual

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ThinkCentre neo 50a 24 Gen 5
ThinkCentre neo 50a 27 Gen 5
Hardware Maintenance Manual

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  • Page 1 ThinkCentre neo 50a 24 Gen 5 ThinkCentre neo 50a 27 Gen 5 Hardware Maintenance Manual...
  • Page 2 Second Edition (February 2025) © Copyright Lenovo 2024, 2025. 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

    Recover from a BIOS update failure ..trademarks ....73 Clear CMOS ....© Copyright Lenovo 2024, 2025...
  • Page 4 ThinkCentre neo 50a 24 Gen 5 ThinkCentre neo 50a 27 Gen 5 Hardware Maintenance Manual...

  • Page 5: About This Manual

    ThinkCentre products, please follow all instructions carefully. Use this manual along with the advanced diagnostic tests to troubleshoot problems effectively. Before servicing a ThinkCentre computer, be sure to read and understand Chapter 1 “Important safety information” on page 1. © Copyright Lenovo 2024, 2025...
  • Page 6 ThinkCentre neo 50a 24 Gen 5 ThinkCentre neo 50a 27 Gen 5 Hardware Maintenance Manual...

  • Page 7: Chapter 1. Important Safety Information

    Avoid contact with hot components inside the computer. During operation, some components become hot enough to burn the skin. Before you open the computer cover, turn off the computer, disconnect power, and wait approximately 10 minutes for the components to cool. © Copyright Lenovo 2024, 2025...

  • Page 8: Electrical Safety

    Electrical safety CAUTION: Electrical current from power, telephone, and communication cables can be hazardous. To avoid personal injury or equipment damage, disconnect the attached power cords, telecommunication systems, networks, and modems before you open the computer covers, unless instructed otherwise in the installation and configuration procedures.

  • Page 9: Safety Inspection Guide

    – Power supply units – Pumps – Blowers and fans – Motor generators and similar units. (This practice ensures correct grounding of the units.) • If an electrical accident occurs: – Use caution; do not become a victim yourself. – Switch off power. –...

  • Page 10: Handling Electrostatic Discharge-Sensitive Devices

    Handling electrostatic discharge-sensitive devices Any computer part containing transistors or integrated circuits (ICs) should be considered sensitive to electrostatic discharge (ESD). ESD damage can occur when there is a difference in charge between objects. Protect against ESD damage by equalizing the charge so that the machine, the part, the work mat, and the person handling the part are all at the same charge.
  • Page 11 • Spanish DANGER Electrical current from power, telephone and communication cables is hazardous. To avoid a shock hazard: • Do not connect or disconnect any cables or perform installation, maintenance, or reconfiguration of this product during an electrical storm. • Connect all power cords to a properly wired and grounded electrical outlet. •...
  • Page 12 When laser products (such as CD-ROMs, DVD-ROM drives, fiber optic devices, or transmitters) are installed, note the following: • Do not remove the covers. Removing the covers of the laser product could result in exposure to hazardous laser radiation. There are no serviceable parts inside the device. •...
  • Page 13 Chapter 1 Important safety information...
  • Page 14 ≥18 kg (37 lb) ≥32 kg (70.5 lb) ≥55 kg (121.2 lb) ThinkCentre neo 50a 24 Gen 5 ThinkCentre neo 50a 27 Gen 5 Hardware Maintenance Manual...
  • Page 15 PERIGO A corrente elétrica proveniente de cabos de alimentação, de telefone e de comunicações é perigosa. Para evitar risco de choque elétrico: • Não conecte nem desconecte nenhum cabo ou execute instalação, manutenção ou reconfiguração deste produto durante uma tempestade com raios. •...
  • Page 16 PRECAUCIÓN: Quando produtos a laser (como unidades de CD-ROMs, unidades de DVD-ROM, dispositivos de fibra ótica ou transmissores) estiverem instalados, observe o seguinte: • Não remova as tampas. A remoção das tampas de um produto a laser pode resultar em exposição prejudicial à...
  • Page 17 Chapter 1 Important safety information...
  • Page 18 ThinkCentre neo 50a 24 Gen 5 ThinkCentre neo 50a 27 Gen 5 Hardware Maintenance Manual...
  • Page 19 Chapter 1 Important safety information...
  • Page 20 DANGER Le courant électrique provenant de l'alimentation, du téléphone et des câbles de transmission peut présenter un danger. Pour éviter tout risque de choc électrique : • Ne manipulez aucun câble et n'effectuez aucune opération d'installation, d'entretien ou de reconfiguration de ce produit au cours d'un orage.
  • Page 21 Connexion Déconnexion 1. Mettez les unités HORS TENSION. 1. Mettez les unités HORS TENSION. 2. Commencez par brancher tous les cordons sur les 2. Débranchez les cordons d'alimentation des prises. unités. 3. Débranchez les câbles d'interface des connecteurs. 3. Branchez les câbles d'interface sur des 4.
  • Page 22 ≥18 kg (37 lb) ≥32 kg (70.5 lb) ≥55 kg (121.2 lb) ATTENTION: Soulevez la machine avec précaution. ATTENTION: L'interrupteur de contrôle d'alimentation de l'unité et l'interrupteur dubloc d'alimentation ne coupent pas le courant électrique alimentantl'unité. En outre, le système peut être équipé de plusieurs cordonsd'alimentation.
  • Page 23 • Geräte niemals einschalten, wenn Hinweise auf Feuer, Wasser oder Gebäudeschäden vorliegen. • Die Verbindung zu den angeschlossenen Netzkabeln, Telekommunikationssystemen, Netzwerken und Modems ist vor dem Öffnen des Gehäuses zu unterbrechen, sofern in den Installations- und Konfigurationsprozeduren keine anders lautenden Anweisungen enthalten sind. •...
  • Page 24 Einige Lasergeräte enthalten eine Laserdiode der Klasse 3A oder 3B. Beachten Sie Folgendes: Laserstrahlung bei geöffneter Verkleidung. Nicht in den Strahl blicken. Keine Lupen oder Spiegel verwenden. Strahlungsbereich meiden. ≥18 kg ≥32 kg ≥55 kg ACHTUNG: Arbeitsschutzrichtlinien beim Anheben der Maschine beachten. ACHTUNG: Mit dem Netzschalter an der Einheit und am Netzteil wird die Stromversorgung für die Einheit nicht unterbrochen.
  • Page 25 Chapter 1 Important safety information...
  • Page 26 PERICOLO La corrente elettrica proveniente dai cavi di alimentazione, del telefono e di comunicazione può essere pericolosa. ThinkCentre neo 50a 24 Gen 5 ThinkCentre neo 50a 27 Gen 5 Hardware Maintenance Manual...
  • Page 27 Per evitare il rischio di scosse elettriche: • Non collegare o scollegare qualsiasi cavo oppure effettuare l'installazione, la manutenzione o la riconfigurazione del prodotto durante un temporale. • Collegare tutti i fili elettrici a una presa di alimentazione correttamente cablata e dotata di messa a terra.
  • Page 28 Quando vengono installati prodotti laser (quali CD-ROM, unità DVD-ROM, unità a fibre ottiche o trasmittenti), tener presente quanto segue: • Non rimuovere gli sportelli. L'apertura di un'unità laser può determinare l'esposizione a radiazioni laser pericolose. All'interno dell'unità non vi sono parti su cui effettuare l'assistenza tecnica. •...
  • Page 29 Chapter 1 Important safety information...
  • Page 30 PELIGRO La corriente eléctrica procedente de cables de alimentación, teléfonos y cables de comunicación puede ser peligrosa. Para evitar el riesgo de descarga eléctrica: • No conecte ni desconecte los cables ni realice ninguna tarea de instalación, mantenimiento o reconfiguración de este producto durante una tormenta eléctrica. •...
  • Page 31 • Cualquier equipo que se conecte a este producto también debe conectarse a tomas de corriente debidamente cableadas. • Siempre que sea posible, utilice una sola mano para conectar o desconectar los cables de señal. • No encienda nunca un equipo cuando hay señales de fuego, agua o daños estructurales. •...
  • Page 32 PELIGRO Algunos productos láser tienen incorporado un diodo láser de clase 3A o clase 3B. Tenga en cuenta lo siguiente: Cuando se abre, queda expuesto a radiación láser. No mire directamente al rayo láser, ni siquiera con instrumentos ópticos, y evite exponerse directamente al rayo láser. ≥18 kg ≥32 kg ≥55 kg...

  • Page 33: Chapter 2. Important Service Information

    • Do not drop a system board or apply any excessive force to it. • Avoid rough handling of any kind. • Avoid bending a system board and hard pushing to prevent cracking at each Ball Grid Array (BGA) chipset. © Copyright Lenovo 2024, 2025...

  • Page 34: How To Use Error Codes

    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 35: Chapter 3. Product Overview

    Infrared LED* Integrated camera Infrared camera* Multi-touch screen* Air vent Camera switch Power button indicator Power button Wireless charging pad* Wireless charging indicator* ® Combo audio jack USB-C (3.2 Gen 2) connector * for selected models © Copyright Lenovo 2024, 2025...

  • Page 36: Rear

    Rear Description Description Item Item ™ HDMI in connector Power connector USB-A 2.0 connectors Ethernet connector USB-A 3.2 Gen 2 connector HDMI 2.1 TMDS out connector ThinkCentre neo 50a 24 Gen 5 ThinkCentre neo 50a 27 Gen 5 Hardware Maintenance Manual...

  • Page 37: Chapter 4. Service Checkout And Symptom-To-Fru Index

    • Processor or hard disk drive upgrades • Failure symptom – Do diagnostics indicate a failure? – What, when, where, single, or multiple systems? – Is the failure repeatable? – Has this configuration ever worked? © Copyright Lenovo 2024, 2025...

  • Page 38: Symptom-To-Fru Index

    – If it has been working, what changes were made prior to its failing? – Is this the original reported failure? • Diagnostics version – Type and version level • Hardware configuration – Print (print screen) configuration currently in use –...

  • Page 39: Power Supply Problems

    Error FRU/Action The boot sector on the startup drive is corrupted. The drive must be formatted. Do the following: 1. Attempt to back up the data on the failing hard disk drive. 2. Using the operating system programs, format the hard disk drive.

  • Page 40: Miscellaneous Error Conditions

    If the POST detects a problem, an error message appears on the screen. A single problem might cause several error messages to appear. When you correct the cause of the first error message, the other error messages probably will not appear on the screen the next time. POST error message Description/Action Error code...
  • Page 41 Message/Symptom FRU/Action "Insert a Diskette" icon appears with a known-good 1. System Board diagnostics diskette in the first 3.5-inch diskette drive. 2. Diskette Drive Cable 3. Network Adapter Intensity or color varies from left to right of characters and 1. Display color bars 2.

  • Page 42: Undetermined Problems

    Message/Symptom FRU/Action Serial or parallel connector device failure (adapter 1. External Device Self-Test OK? connector) 2. External Device 3. Cable 4. Alternate Adapter 5. System Board Some or all keys on the keyboard do not work 1. Keyboard 2. Keyboard Cable 3.

  • Page 43: Clear Cmos

    11. To prevent data loss, ensure that BIOS settings are restored to an earlier point. Clear CMOS 1. Remove all media from the drives and turn off all connected devices and the computer. 2. Disconnect all power cords from electrical outlets. Then, remove any parts that impede access to the JCRIS1 pads.
  • Page 44 ThinkCentre neo 50a 24 Gen 5 ThinkCentre neo 50a 27 Gen 5 Hardware Maintenance Manual...

  • Page 45: Chapter 5. Diagnostics

    4. Run the diagnostic program. 5. Recover your operating system. See “Self-help resources” on page 40. 6. If the problem persists, contact Lenovo. UEFI diagnostic program A UEFI diagnostic program is preinstalled on the computer. It enables you to test memory modules and internal storage devices, view system information, and check and recover bad sectors on internal storage devices.

  • Page 46: Lenovo Diagnostic Tools

    If you are unable to isolate and resolve the problem after running the Vantage app, save and print the log files created by the program. You might need the log files when you speak to a Lenovo technical support representative.
  • Page 47 • Setup Guide want. • This User Guide • Regulatory Notice Lenovo Support Web site with the latest support information of the following: • Drivers and software • Diagnostic solutions https://pcsupport.lenovo.com • Product and service warranty •...
  • Page 48 ThinkCentre neo 50a 24 Gen 5 ThinkCentre neo 50a 27 Gen 5 Hardware Maintenance Manual...

  • Page 49: Chapter 6. Hardware Removal And Installation

    Screwdriver: Phillips Head 01 1, Shank length greater than 6 ThinkStation/DT Common tool inches Screwdriver: Phillips Head 02 2, Shank length greater than 6 ThinkStation/SC/DT Common tool inches Screwdriver: Torx Head T5 IdeaPad Common tool © Copyright Lenovo 2024, 2025...
  • Page 50 Tool name Specification Product scope Tool type Screwdriver: Torx Head T15 T15, for Chassis outside ThinkStation Common tool Screwdriver: Torx Head T20 T20, Shank length greater than ThinkStation Common tool 6 inches, for heatsink and CPU Screwdriver: Torx Head T30 T30, Shank length greater than ThinkStation Common tool...
  • Page 51 Tool name Specification Product scope Tool type Mylar tape Consumable Eraser Consumable Electrical tape Consumable Double sided tape Consumable Conductive tape Consumable Cleaning pads/wipes Consumable Heat gun Special Tool (Depot only) Brown brush 25 mm to 35 mm wide Special tool Contact Cleaner Spray WD-40 Contact Cleaner for ThinkPad X1 Carbon...

  • Page 52: Major Frus And Crus

    If customers elect to replace the FRU by themselves, we recommend that you ensure the correct instructions provided by Lenovo are carefully followed. ThinkCentre neo 50a 24 Gen 5 ThinkCentre neo 50a 27 Gen 5 Hardware Maintenance Manual...
  • Page 53 Hinge cover VR pads ac power adapter Power cord Mouse* Keyboard* Screw kit * for selected models For detailed FRU and CRU information, such as the FRU part numbers and supported computer models, go http://www.lenovo.com/serviceparts-lookup Chapter 6 Hardware removal and installation...

  • Page 54: System Board

    System board Wireless charger connector 30-pin LVDS cable connector M.2 Wi-Fi card slot M.2 solid-state drive slot Fan connector Backlight cable connector Touch cable connector Camera module connector Speaker connector Coin-cell battery Memory slot (SO-DIMM 2) Memory slot (SO-DIMM 1) Microprocessor Removing and installing hardware This section provides instructions on how to remove and install hardware for your computer.

  • Page 55: System Board Shield

    Replacement procedure 1. Turn off the computer and remove all connected devices and cables. 2. Disconnect all power cords from electrical outlets and disconnect all cables from the computer. 3. Unlock any locking device that secures the computer back cover. 4.

  • Page 56: Memory Modules

    3. Remove eight screws and the tape. Then, remove the system board shield. 4. Reinstall the system board shield. 5. Reinstall the removed parts in reverse order of the removal steps mentioned above. 6. Reconnect the external cables and power cords to the corresponding connectors on the computer. Memory modules Prerequisite Before you start, read Generic Safety and Compliance Notices, and print the following instructions.

  • Page 57: M.2 Solid-State Drive And Thermal Pad

    Replacement procedure 1. Remove the computer back cover. See “Computer back cover” on page 48. 2. Remove the system board shield. See “System board shield” on page 49. 3. Unlock the latches of the memory modules and remove the memory modules. 4.

  • Page 58: Wi-Fi Card

    3. Remove the M.2 solid-state drive thermal pad. 4. Remove one screw and then remove the solid-state drive by pulling it away from the slot. 5. Reinstall the M.2 solid-state drive and the thermal pad. 6. Reinstall all the removed parts and then reconnect the cables. Wi-Fi card Prerequisite Before you start, read Generic Safety and Compliance Notices, and print the following instructions.
  • Page 59 Before you open the computer cover, turn off the computer and wait several minutes until the computer is cool. Replacement procedure 1. Remove the computer back cover. See “Computer back cover” on page 48. 2. Remove the system board shield. See “System board shield” on page 49. 3.

  • Page 60: Heat Sink

    Heat sink Prerequisite Before you start, read Generic Safety and Compliance Notices, and print the following instructions. The heat sink might be very hot. Before you open the computer cover, turn off the computer and wait several minutes until the computer is cool. Replacement procedure 1.

  • Page 61: Hinge Cover

    Note: Before you attach the heat sink to the computer, clean all thermal grease that has been used and then apply new thermal grease. Apply new thermal grease at an amount of 0.5 grams, on the parts marked as shown in the following illustrations. Either too much or too less application of grease can cause a thermal problem due to imperfect contact with a component.

  • Page 62: Shoulder Covers

    Shoulder covers Prerequisite Before you start, read Generic Safety and Compliance Notices, and print the following instructions. Before you open the computer cover, turn off the computer and wait several minutes until the computer is cool. Replacement procedure 1. Remove the computer back cover. See “Computer back cover” on page 48. 2.

  • Page 63: Computer Stand

    2. Remove the hinge cover. See “Hinge cover” on page 55. 3. Remove the shoulder covers. See “Shoulder covers” on page 56. 4. Remove one screw and then remove the hinge decorative cover. 5. Reinstall the hinge decorative cover. 6. Reinstall all the removed parts and then reconnect the cables. Computer stand Prerequisite Before you start, read Generic Safety and Compliance Notices, and print the following instructions.
  • Page 64 6. Record the cable routing and cable connections, and then disconnect all cables from the system board. See “System board” on page 48. Note: Disconnect the touch cable if any. 7. Remove four screws and then remove the computer stand. ThinkCentre neo 50a 24 Gen 5 ThinkCentre neo 50a 27 Gen 5 Hardware Maintenance Manual...

  • Page 65: System Board

    8. Reinstall the computer stand. 9. Reinstall all the removed parts and then reconnect the cables. System board Prerequisite Before you start, read Generic Safety and Compliance Notices, and print the following instructions. Before you open the computer cover, turn off the computer and wait several minutes until the computer is cool.
  • Page 66 8. Remove the two screws that secure the system board, and then carefully lift the system board out of the chassis. Note: Carefully handle the system board by its edges. 9. Install the new system board into the chassis by aligning the four screw holes in the new system board with the corresponding mounting studs on the chassis.

  • Page 67: Vr Pads

    The Golden Key U1 tool is prepared by running the U1 Update software on a FAT32-formatted USB thumb drive. Go to https://support.lenovo.com/us/en/solutions/ht102004 for detailed instructions on how to create and use a Golden Key U1 tool. VR pads Prerequisite Before you start, read Generic Safety and Compliance Notices, and print the following instructions.

  • Page 68: Computer Front Cover

    10. Reinstall all the removed parts and then reconnect the cables. Computer front cover Prerequisite Before you start, read Generic Safety and Compliance Notices, and print the following instructions. Before you open the computer cover, turn off the computer and wait several minutes until the computer is cool.

  • Page 69: Speaker

    14. Reinstall the computer front cover. 15. Reinstall all the removed parts and then reconnect the cables. Speaker Prerequisite Before you start, read Generic Safety and Compliance Notices, and print the following instructions. Before you open the computer cover, turn off the computer and wait several minutes until the computer is cool.

  • Page 70: Fan

    14. Reinstall the speaker. 15. Reinstall all the removed parts and then reconnect the cables. Prerequisite Before you start, read Generic Safety and Compliance Notices, and print the following instructions. Before you open the computer cover, turn off the computer and wait several minutes until the computer is cool.

  • Page 71: Lcd Cover

    14. Reinstall the fan. 15. Reinstall all the removed parts and then reconnect the cables. LCD cover Prerequisite Before you start, read Generic Safety and Compliance Notices, and print the following instructions. Before you open the computer cover, turn off the computer and wait several minutes until the computer is cool.

  • Page 72: Backlight Cable

    7. Reinstall the LCD cover. 8. Reinstall all the removed parts and then reconnect the cables. Backlight cable Prerequisite Before you start, read Generic Safety and Compliance Notices, and print the following instructions. Before you open the computer cover, turn off the computer and wait several minutes until the computer is cool.

  • Page 73: Lvds Cable

    8. Reinstall the backlight cable. 9. Reinstall all the removed parts and then reconnect the cables. LVDS cable Prerequisite Before you start, read Generic Safety and Compliance Notices, and print the following instructions. Before you open the computer cover, turn off the computer and wait several minutes until the computer is cool.

  • Page 74: Touch Cable (For Selected Models)

    8. Reinstall the LVDS cable. 9. Reinstall all the removed parts and then reconnect the cables. Touch cable (for selected models) Prerequisite Before you start, read Generic Safety and Compliance Notices, and print the following instructions. Before you open the computer cover, turn off the computer and wait several minutes until the computer is cool.

  • Page 75: Lcd Frame

    8. Reinstall the touch cable. 9. Reinstall all the removed parts and then reconnect the cables. LCD frame Prerequisite Before you start, read Generic Safety and Compliance Notices, and print the following instructions. Before you open the computer cover, turn off the computer and wait several minutes until the computer is cool.

  • Page 76: Camera Module

    11. Reinstall the LCD frame. 12. Reinstall all the removed parts and then reconnect the cables. Camera module Prerequisite Before you start, read Generic Safety and Compliance Notices, and print the following instructions. Before you open the computer cover, turn off the computer and wait several minutes until the computer is cool.
  • Page 77 12. Reinstall the camera module. 13. Reinstall all the removed parts and then reconnect the cables. Chapter 6 Hardware removal and installation...
  • Page 78 ThinkCentre neo 50a 24 Gen 5 ThinkCentre neo 50a 27 Gen 5 Hardware Maintenance Manual...

  • Page 79: Chapter 7. Notices And Trademarks

    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 80 Actual results may vary. Users of this document should verify the applicable data for their specific environment. This document is copyrighted by Lenovo and is not covered by any open source license, including any Linux agreement(s) which may accompany software included with this product. Lenovo may update this document at any time without notice.

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