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Lenovo ThinkCentre M90a Pro Gen4 Hardware Maintenance Manual
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Lenovo ThinkCentre M90a Pro Gen4 Hardware Maintenance Manual

Lenovo ThinkCentre M90a Pro Gen4 Hardware Maintenance Manual

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  • Page 1 M90a Pro Gen4 Hardware Maintenance Manual...
  • Page 2 First Edition (September 2023) © Copyright Lenovo 2023. 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

    Basic procedure for resolving computer trademarks ....83 problems ....© Copyright Lenovo 2023...
  • Page 4 M90a Pro Gen4 Hardware Maintenance Manual...

  • Page 5: About This Manual

    Important: This manual is intended only for trained service technicians who are familiar with ThinkCentre computers. 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 2023...
  • Page 6 M90a Pro Gen4 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 2023...

  • 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) M90a Pro Gen4 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 M90a Pro Gen4 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. M90a Pro Gen4 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 2023...

  • 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

    3. Integrated camera or Infrared (IR) camera* 4. Integrated camera or Infrared (IR) camera shield* 5. IR camera activity indicator* 6. Screen 7. System status indicator 8. Microphone mute/unmute indicator* 9. Microphone mute/unmute control 10. Thunderbolt™ 4 connector © Copyright Lenovo 2023...
  • Page 36 11. USB 3.2 connectors Gen 2 12. Thunderbolt 3 connector* 13. Headset connector 14. SD-card slot* 16. Optical drive activity indicator* 15. Power button 17. Optical drive eject button* * for selected models System status indicator Show the system status of your computer. Thunderbolt 3 connector For the use of this connector, see “Thunderbolt 3 connector”...

  • Page 37: Rear

    Rear ™ 1. DisplayPort out connector ™ 2. HDMI in 1.4/Out 2.1 TMDS combo connector ® 4. USB-C (3.2 Gen 2) connector 3. Ethernet connector 6. USB 3.2 connector Gen 1 (with smart power-on 5. USB 3.2 connectors Gen 1 feature) 7.
  • Page 38 M90a Pro Gen4 Hardware Maintenance Manual...

  • Page 39: Chapter 4. Service Checkout And Symptom-To-Fru Index

    • Machine type and model • 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 2023...

  • Page 40: 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 41: 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 42: Post Error Codes

    POST error codes Each time you turn on the system, it performs a series of tests that check the operation of the system and some options. This series of tests are called the Power-On Self-Test, or POST. POST checks the following operations: •...

  • Page 43: Miscellaneous Error Conditions

    POST error message Description/Action Error code 8998 Not enough shadow RAM resources This error message is displayed for OPTION ROM, not all devices when the shadow RAM resources initialized. Suggest to remove some for option ROM are insufficient. add-on cards, or change to UEFI If the legacy option ROM is mode in BIOS setup.
  • Page 44 Message/Symptom FRU/Action Blank screen except for flashing cursor. 1. System Board 2. Primary Hard Disk Drive 3. Hard Disk Drive Cable Incorrect memory size during POST 1. Run the Memory tests. 2. Memory Module 3. System Board "Insert a Diskette" icon appears with a known-good 1.

  • Page 45: Undetermined Problems

    Message/Symptom FRU/Action Serial or parallel connector device failure (system board 1. External Device Self-Test OK? connector) 2. External Device 3. Cable 4. System Board Serial or parallel connector device failure (adapter 1. External Device Self-Test OK? connector) 2. External Device 3.

  • Page 46: Clear Cmos

    Note: Depending on the computer model, the recovery process will take two to three minutes. 8. Disconnect all power cords from electrical outlets. 9. Move the jumper back to the standard position. 10. Reinstall all the parts that have been removed. Then, reconnect the power cords for the computer and the monitor to electrical outlets.

  • Page 47: Chapter 5. Diagnostics

    4. Run the diagnostic program. 5. Recover your operating system. See “Self-help resources” on page 42. 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 48: 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 49 • 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 50 M90a Pro Gen4 Hardware Maintenance Manual...

  • Page 51: Chapter 6. Hardware Removal And Installation

    Screw driver: Torx Head IdeaPad Common tool Screw driver: Torx Head T15, for Chassis outside ThinkSation Common tool Screw driver: Torx Head T20, Shank length greater ThinkSation Common tool than 6 inches, for heatsink and CPU © Copyright Lenovo 2023...

  • Page 52: Major Frus And Crus

    Tool name Specific Product scope Tool type Screw driver: Torx Head T30, Shank length greater ThinkSation Common tool than 6 inches, for heatsink and CPU Pry tools 1 Common tool Tweezers (conductive) Common tool Tweezers (isolated) Common tool Suction cup Common tool Hexagonal socket (for H5 mm or 4.8 mm...
  • Page 53 Chapter 6 Hardware removal and installation...
  • Page 54 Number Description Self-service CRU Optional-service CRU UltraFlex V Stand* UltraFlex V Stand base* Full-function monitor stand* Full-function monitor stand base* System board shield ® VESA mount bracket Cover presence switch (intrusion switch)* GPU card* Thunderbolt card* Microprocessor System board Memory modules* Thermal pads for solid-state drive* M.2 solid-state drives* Wi-Fi card*...
  • Page 55 Heat sinks System fan Camera module with cables, radar card and camera hinge cover* Screw kits 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 56: System Board

    System board M90a Pro Gen4 LCD backlight power connector LCD LVDS1 connector Radar card connector LCD LVDS2 connector Microprocessor Camera connector System fan connector Memory slots SATA2 Power supply unit connector SATA1 Hard disk drive power connector Cover presence switch connector(intrusion switch Optical disk drive power connector connector) Wi-Fi card slot...

  • Page 57: Removing And Installing Hardware

    Removing and installing hardware This section provides instructions on how to remove and install hardware for your computer. Attention: Do not open your computer or attempt any repair before reading and understanding the Chapter 1 “Important safety information” on page 1. Note: When mounting the computer on a VESA mount, position the computer monitor either horizontally (with the screen facing forward and the side I/O ports facing right) or vertically (with the screen facing forward and the side I/O ports facing down).
  • Page 58 • UltraFlex III Stand M90a Pro Gen4 Hardware Maintenance Manual...
  • Page 59 Chapter 6 Hardware removal and installation...

  • Page 60: Rear I/O Cover

    Rear I/O cover Prerequisite Before you start, read Generic Safety and Compliance Notices, and print the following instructions. Before you open the rear cover, turn off the computer and wait several minutes until the computer is cool. For access, do the following: M90a Pro Gen4 Hardware Maintenance Manual...

  • Page 61: System Board Shield

    1. Turn off the computer and remove all connected devices and cables. 2. Unlock any locking device that secures the computer cover. 3. Place a soft, clean towel or cloth on the desk or surface. Hold the sides of your computer and gently lay it down so that the screen is against the surface and the computer cover is facing up.

  • Page 62: Osd Button And Osd Bracket

    For access, remove the following parts in order, if any: • “Computer stand” on page 51. • “Rear I/O cover” on page 54. Removal procedure OSD button and OSD bracket Prerequisite Before you start, read Generic Safety and Compliance Notices, and print the following instructions. For access, remove the following parts in order, if any: •...

  • Page 63: Vesa Mount Bracket

    Screw (quantity) Torque SCRW M3X4MM*D6 FLH NYLOK(1) 3 ± 0.5 lb/in Screw (quantity) Torque SCRW M3 XL6(1) 3 ± 0.5 lb/in VESA mount bracket Prerequisite Before you start, read Generic Safety and Compliance Notices, and print the following instructions. For access, remove the following parts in order, if any: •...

  • Page 64: Cover Presence Switch (Intrusion Switch)

    Removal steps Screw (quantity) Torque SCRW M3X4MM*D6 FLH NYLOK(4) 3 ± 0.5 lb/in Cover presence switch (intrusion switch) Prerequisite Before you start, read Chapter 1 “Important safety information” on page 1 and print the following instructions. For access, do the following: 1.

  • Page 65: Hard Disk Drive

    Hard disk drive Prerequisite Before you start, read Generic Safety and Compliance Notices, and print the following instructions. Attention: The internal storage drive is sensitive. Inappropriate handling might cause damage and permanent loss of data. When handling the internal storage drive, observe the following guidelines: •...
  • Page 66 • “Computer stand” on page 51. • “Rear I/O cover” on page 54. • “System board shield” on page 55. • “VESA mount bracket” on page 57. • “Hard disk drive” on page 59. • Disconnect the signal and power cable from the optical drive. Removal steps Note: Some computer models might not be shipped with an optical drive.

  • Page 67: M.2 Solid-State Drive

    Screw (quantity) Torque SCRW M2X3MM*D4(2) 1.5 ± 0.5 lb/in M.2 solid-state drive Prerequisite Before you start, read Generic Safety and Compliance Notices, and print the following instructions. Attention: The internal storage drive is sensitive. Inappropriate handling might cause damage and permanent loss of data.

  • Page 68: Thunderbolt Card

    Screw (quantity) Torque SCRW M2 CAP L4 NI(1) 1.5 ± 0.5 lb/in Thunderbolt card Prerequisite Before you start, read Generic Safety and Compliance Notices, and print the following instructions. For access, remove the following parts in order, if any: • “Computer stand” on page 51. •...

  • Page 69: Memory Module

    Screw (quantity) Torque SCRW M3X4MM*D6 FLH NYLOK(2) 3 ± 0.5 lb/in Memory module Prerequisite Before you start, read Generic Safety and Compliance Notices, and print the following instructions. Ensure that you follow the installation order for memory modules shown in the following illustration. For access, remove the following parts in order, if any: •...

  • Page 70: Wi-Fi Card And Wi-Fi Card Shield

    Wi-Fi card and Wi-Fi card shield Prerequisite Before you start, read Generic Safety and Compliance Notices, and print the following instructions. For access, remove the following parts in order, if any: • “Computer stand” on page 51. • “Rear I/O cover” on page 54. •...

  • Page 71: Gpu Card

    • “Rear I/O cover” on page 54. • “System board shield” on page 55. • “VESA mount bracket” on page 57. Removal steps Screw (quantity) Torque SCRW M3X4MM*D6 FLH NYLOK(2) 3 ± 0.5 lb/in GPU card Prerequisite Before you start, read Generic Safety and Compliance Notices, and print the following instructions. For access, remove the following parts in order, if any: •...

  • Page 72: System Fan

    Removal steps Screw (quantity) Torque SCRW M3X4MM*D6 FLH NYLOK(2) 3 ± 0.5 lb/in System fan Prerequisite Before you start, read Generic Safety and Compliance Notices, and print the following instructions. For access, remove the following parts in order, if any: •...

  • Page 73: Heat Sink

    Removal steps Screw (quantity) Torque SCRW M3 XL10-STEP(3) 3 ± 0.5 lb/in 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.

  • Page 74: Microprocessor

    Screw (quantity) Torque M-FLAT-PHILLIPS_M3-L4_OD6(9) 3 ± 0.5 lb/in • Type 2 Screw (quantity) Torque M-FLAT-PHILLIPS_M3-L4_OD6(5) 3 ± 0.5 lb/in Microprocessor Prerequisite Before you start, read Generic Safety and Compliance Notices, and print the following instructions. CAUTION: 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.

  • Page 75: System Board

    • “Computer stand” on page 51. • “Rear I/O cover” on page 54. • “VESA mount bracket” on page 57. • “Heat sink” on page 67. Removal steps Notes: • Your microprocessor and socket might look different from the one illustrated. •...

  • Page 76: Coin-Cell Battery

    • “Memory module” on page 63. • “Wi-Fi card and Wi-Fi card shield” on page 64. • “Card reader board” on page 64. • “GPU card” on page 65. • “System fan” on page 66. • “Heat sink” on page 67. •...
  • Page 77 To dispose of the coin-cell battery, refer to the “Lithium coin-cell battery notice” in the Safety and Warranty Guide. For access, remove the following parts in order, if any: • “Computer stand” on page 51. • “Rear I/O cover” on page 54. •...

  • Page 78: Integrated Camera And Microphone Module

    Integrated camera and microphone module Prerequisite Before you start, read Generic Safety and Compliance Notices, and print the following instructions. For access, do the following: 1. Remove the following parts in order, if any: • “Computer stand” on page 51. •...
  • Page 79 • “System board shield” on page 55. • “VESA mount bracket” on page 57. • Disconnect the power supply assembly cables from the system board. Removal procedure Chapter 6 Hardware removal and installation...

  • Page 80: Side I/O Bezel

    Screw (quantity) Torque SCRW M3X4MM*D6 FLH NYLOK(7) 3 ± 0.5 lb/in Side I/O bezel Prerequisite Before you start, read Generic Safety and Compliance Notices, and print the following instructions. For access, remove the following parts in order, if any: • “Computer stand” on page 51. •...

  • Page 81: Internal Speakers

    Removal procedure of the right bezel Screw (quantity) Torque SCRW M3X4MM*D6 FLH NYLOK(2) 3 ± 0.5 lb/in Internal speakers Prerequisite Before you start, read Generic Safety and Compliance Notices, and print the following instructions. For access, remove the following parts in order, if any: •...

  • Page 82: Main Frame

    • “Side I/O bezel” on page 74. • “Right bezel” on page 74. Removal procedure Screw (quantity) Torque SCRW M3 XL10-STEP(5) 3 ± 0.5 lb/in Main frame Prerequisite Before you start, read Generic Safety and Compliance Notices, and print the following instructions. For access, remove the following parts in order, if any: •...

  • Page 83: Wi-Fi Antennas

    • “Heat sink” on page 67. • “Microprocessor” on page 68. • “System board” on page 69. • “Power supply assembly” on page 72. • “Integrated camera and microphone module” on page 72. • “Side I/O bezel” on page 74. •...

  • Page 84: Front Decoration Cover

    • “Hard disk drive” on page 59. • “Optical drive” on page 59. • “M.2 solid-state drive” on page 61. • “Memory module” on page 63. • “Wi-Fi card and Wi-Fi card shield” on page 64. • “Card reader board” on page 64. •...

  • Page 85: Lcd Bracket And Lcd Panel

    • “Cover presence switch (intrusion switch)” on page 58. • “Hard disk drive” on page 59. • “Optical drive” on page 59. • “M.2 solid-state drive” on page 61. • “Thunderbolt card” on page 62 • “Memory module” on page 63. •...
  • Page 86 • “Rear I/O cover” on page 54. • “System board shield” on page 55. • “OSD button and OSD bracket” on page 56 • “VESA mount bracket” on page 57. • “Cover presence switch (intrusion switch)” on page 58. • “Hard disk drive” on page 59. •...
  • Page 87 Screw (quantity) Torque SCRW FLAT M3*L4 NYLOK(16) 3 ± 0.5 lb/in Chapter 6 Hardware removal and installation...
  • Page 88 M90a Pro Gen4 Hardware Maintenance Manual...

  • Page 89: 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 90 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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