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Lenovo IdeaCentre A540-24ICB Hardware Maintenance Manual
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Lenovo IdeaCentre A540-24ICB Hardware Maintenance Manual

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IdeaCentre A540-24ICB and A540-24API
Hardware Maintenance Manual

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Summary of Contents for Lenovo IdeaCentre A540-24ICB

  • Page 1 IdeaCentre A540-24ICB and A540-24API Hardware Maintenance Manual...
  • Page 2 First Edition (July 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

    ....Startup problems ... . Screen problems ... . © Copyright Lenovo 2019...
  • Page 4 Chapter 7. Notices and trademarks ....121 IdeaCentre A540-24ICB and A540-24API Hardware Maintenance Manual...

  • Page 5: About This Manual

    Important: This manual is intended only for trained service technicians who are familiar with IdeaCentre computers. Use this manual along with the advanced diagnostic tests to troubleshoot problems effectively. Before servicing a IdeaCentre computer, be sure to read and understand Chapter 2 “Important service information” on page 27. © Copyright Lenovo 2019...
  • Page 6 IdeaCentre A540-24ICB and A540-24API 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 2019...

  • Page 8: Electrical Safety

    • Do not touch live electrical circuits with the reflective surface of a plastic dental mirror. The surface is conductive; such touching can cause personal injury and machine damage. IdeaCentre A540-24ICB and A540-24API Hardware Maintenance Manual...

  • Page 9: Safety Inspection Guide

    • Do not service the following parts with the power on when they are removed from their normal operating places in a machine: – Power supply units – Pumps – Blowers and fans – Motor generators and similar units. (This practice ensures correct grounding of the units.) •...

  • Page 10: Handling Electrostatic Discharge-Sensitive Devices

    The caution and danger safety notices in this section are provided in the following languages: • English • Arabic • Brazilian/Portuguese • Chinese (simplified) • Chinese (traditional) • French • German • Hebrew IdeaCentre A540-24ICB and A540-24API Hardware Maintenance Manual...
  • Page 11 • Italian • Korean • 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. •...
  • Page 12 The device also might have more than one power cord. To remove all electrical current from the device, ensure that all power cords are disconnected from the power source. IdeaCentre A540-24ICB and A540-24API Hardware Maintenance Manual...
  • Page 13 Chapter 1 Important safety information...
  • Page 14 ≥18 kg (37 lb) ≥32 kg (70.5 lb) ≥55 kg (121.2 lb) IdeaCentre A540-24ICB and A540-24API 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 O dispositivo também pode ter mais de um cabo de alimentação. Para remover toda a corrente elétrica do dispositivo, assegure que todos os cabos de alimentação estejam desconectados da fonte de alimentação. IdeaCentre A540-24ICB and A540-24API Hardware Maintenance Manual...
  • Page 17 Chapter 1 Important safety information...
  • Page 18 IdeaCentre A540-24ICB and A540-24API Hardware Maintenance Manual...
  • Page 19 Chapter 1 Important safety information...
  • Page 20 (sauf instruction contraire mentionnée dans les procédures d'installation et de configuration). • Lorsque vous installez, que vous déplacez, ou que vous manipulez le présent produit ou des périphériques qui lui sont raccordés, reportez-vous aux instructions ci-dessous pour connecter et déconnecter les différents cordons. IdeaCentre A540-24ICB and A540-24API Hardware Maintenance Manual...
  • 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 • Die Signalkabel nach Möglichkeit einhändig anschließen oder lösen, um einen Stromschlag durch Berühren von Oberflächen mit unterschiedlichem elektrischem Potenzial zu vermeiden. • Geräte niemals einschalten, wenn Hinweise auf Feuer, Wasser oder Gebäudeschäden vorliegen. IdeaCentre A540-24ICB and A540-24API Hardware Maintenance Manual...
  • Page 23 • 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. • Zum Installieren, Transportieren und Öffnen der Abdeckungen des Computers oder der angeschlossenen Einheiten die Kabel gemäß...
  • Page 24 Mit dem Netzschalter an der Einheit und am Netzteil wird die Stromversorgung für die Einheit nicht unterbrochen. Die Einheit kann auch mit mehreren Netzkabeln ausgestattet sein. Um die Stromversorgung für die Einheit vollständig zu unterbrechen, müssen alle zum Gerät führenden Netzkabel vom Netz getrennt werden. IdeaCentre A540-24ICB and A540-24API Hardware Maintenance Manual...
  • 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. Per evitare il rischio di scosse elettriche: IdeaCentre A540-24ICB and A540-24API Hardware Maintenance Manual...
  • Page 27 • 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. • Collegare alle prese elettriche appropriate tutte le apparecchiature che verranno utilizzate per questo prodotto.
  • Page 28 Il pulsante di controllo dell'alimentazione presente sull'unità e l'interruttore dell'alimentatore non disattivano l'alimentazione corrente fornita all'unità. E' possibile che l'unità disponga di più cavi di alimentazione. Per disattivare l'alimentazione dall'unità, accertarsi che tutti i cavi di alimentazione siano scollegati dalla fonte di alimentazione. IdeaCentre A540-24ICB and A540-24API Hardware Maintenance Manual...
  • Page 29 Chapter 1 Important safety information...
  • Page 30 • 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. IdeaCentre A540-24ICB and A540-24API Hardware Maintenance Manual...
  • Page 31 • No encienda nunca un equipo cuando hay señales de fuego, agua o daños estructurales. • Desconecte los cables de alimentación, los sistemas de telecomunicaciones, las redes y los módems conectados antes de abrir las cubiertas de los dispositivos, a menos que se indique lo contrario en los procedimientos de instalación y configuración.
  • Page 32 Además, el dispositivo podría tener más de un cable de alimentación. Para suprimir toda la corriente eléctrica del dispositivo, asegúrese de que todos los cables de alimentación estén desconectados de la toma de corriente. IdeaCentre A540-24ICB and A540-24API Hardware Maintenance Manual...

  • Page 33: Chapter 2. Important Service Information

    Use the error codes displayed on the screen to diagnose failures. If more than one error code is displayed, begin the diagnosis with the first error code. Whatever causes the first error code might also cause false error © Copyright Lenovo 2019...

  • Page 34: Strategy For Replacing Fru For Cto, Special-Bid, And Standard Models

    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* 4. Infrared camera* 5. Screen 6. Wireless charging pad** 7. Internal speakers 8. Wireless charging indicator** * Either an integrated camera or an infrared camera is provided on your computer. ** for selected models © Copyright Lenovo 2019...

  • Page 36: Rear

    6. USB 3.1 connector Gen 1/Gen 2* 7. 3 in 1 SD card slot 8. USB 3.1 connectors Gen 1/Gen 2* (2) 9. Combo audio jack 10. Power adapter connector 11. Power button * for A540–24ICB models only IdeaCentre A540-24ICB and A540-24API Hardware Maintenance Manual...

  • Page 37: Bottom

    Bottom 1. Storage drive door* 2. Internal speakers (2) * for selected models Chapter 3 Product overview...
  • Page 38 IdeaCentre A540-24ICB and A540-24API 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 2019...

  • Page 40: Symptom-To-Fru Index

    The start-up drive is not in the boot sequence in Check the configuration and ensure that the start-up drive configuration. is in the boot sequence. No operating system installed on the boot drive. Install an operating system on the boot drive. IdeaCentre A540-24ICB and A540-24API Hardware Maintenance Manual...

  • 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

    1962 No operating system found. Boot This error occurs only after the sequence will automatically repeat. POST is completed. Press any key to repeat boot sequence. IdeaCentre A540-24ICB and A540-24API Hardware Maintenance Manual...

  • Page 43: Miscellaneous Error Conditions

    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 RPL computer cannot access programs from its own hard 1. If the network administrator is using LCCM Hybrid disk. RPL, check the startup sequence: a. First device - network b. Second device - hard disk 2. Hard disk drive IdeaCentre A540-24ICB and A540-24API Hardware Maintenance Manual...

  • Page 45: Undetermined Problems

    Message/Symptom FRU/Action RPL computer does not RPL from server 1. Check the startup sequence. 2. Check the network adapter LED status. Serial or parallel connector device failure (system board 1. External Device Self-Test OK? connector) 2. External Device 3. Cable 4.
  • Page 46 IdeaCentre A540-24ICB and A540-24API Hardware Maintenance Manual...

  • Page 47: Chapter 5. Troubleshooting And Recovery

    4. Run the diagnostic program. 5. Recover your operating system. See “Recovery” on page 49. 6. If the problem persists, contact Lenovo. Troubleshooting Use the troubleshooting information to find solutions to problems that have definite symptoms. © Copyright Lenovo 2019...

  • Page 48: Startup Problems

    – Ensure that the Optane memory is not damaged. Check the Optane memory using diagnostic tools. The computer beeps multiple times before Ensure that no keys are stuck. the operating system starts up. IdeaCentre A540-24ICB and A540-24API Hardware Maintenance Manual...

  • Page 49: Screen Problems

    Screen problems Problem Solution • The computer voltage matches the voltage available at the electrical outlet for your country or region. • Press a key to exit the screen saver. • Press the power button to resume the computer from sleep or The screen goes blank while the computer is hibernation mode.

  • Page 50: Audio Problems

    1. Right-click the volume icon in the Windows notification area on the taskbar. Then, click Open Volume Mixer and select the desired speaker. 2. Click the speaker icon on top of the volume control, and then click the Levels tab. IdeaCentre A540-24ICB and A540-24API Hardware Maintenance Manual...

  • Page 51: Network Problems

    Network problems Note: The Wi-Fi and Bluetooth features are optional. Problem Solution • Connect the cable from the Ethernet connector to the RJ45 connector of the hub. • Enable the Ethernet LAN feature in UEFI BIOS. • Enable the Ethernet LAN adapter. 1.
  • Page 52 4. To use the headset profile, select Bluetooth Hands-free Audio, and then click Set Default. To use the AV profile, select Stereo Audio, and then click Set Default. 5. Click OK. IdeaCentre A540-24ICB and A540-24API Hardware Maintenance Manual...

  • Page 53: Performance Problems

    Performance problems Problem Solution Note: Depending on the volume of the storage drives and amount of data stored on the storage drives, the disk-defragmentation process might take up to several hours. 1. Close any open programs and windows. 2. Open the Start menu. Excessive fragmented files exist on the 3.

  • Page 54: Storage Drive Problems

    • Ensure that the disc surface is clean and not scratched. out while a DVD movie is playing. • Check all cable connections to and from the speakers. • Use the DVD menu for the video to select a different audio track. IdeaCentre A540-24ICB and A540-24API Hardware Maintenance Manual...

  • Page 55: Serial Connector Problems

    Recovery This section introduces the recovery information of the Windows 10 operating system. Ensure that you read and follow the on-screen recovery instructions. The data on your computer might be deleted during the recovery process.

  • Page 56: Restore System Files And Settings To An Earlier Point

    It is recommended that you create a recovery USB drive as early as possible as a backup for the Windows recovery programs. With the recovery USB drive, you can troubleshoot and fix the problems even if the preinstalled Windows recovery programs are damaged. IdeaCentre A540-24ICB and A540-24API Hardware Maintenance Manual...

  • Page 57: Update The Device Driver

    • From Windows Update: Note: The device drivers provided by Windows Update might not be tested by Lenovo. It is recommended that you get device drivers from Lenovo. 1. Open the Start menu.
  • Page 58 3. Follow the on-screen instructions. IdeaCentre A540-24ICB and A540-24API Hardware Maintenance Manual...

  • Page 59: Chapter 6. Hardware Removal And Installation

    Common tool Isolated tweezers Common tool Hexagonal socket Common tool Silicone grease Consumable tool Polyamide tape Consumable tool Mylar tape Consumable tool Eraser Consumable tool Electrical tape Consumable tool Double-sided tape Consumable tool Conductive tape Consumable tool © Copyright Lenovo 2019...

  • Page 60: Major Fru And Cru

    FRU by themselves, the product warranty might be affected. Number Description Self-service CRU Optional-service CRU Mouse Computer chassis System stand Hinge cover System board Power switch board Wireless charging module DC-in board Subwoofer Wi-Fi card IdeaCentre A540-24ICB and A540-24API Hardware Maintenance Manual...
  • Page 61 Wi-Fi antennas (2) LCD panel Speakers Memory module M.2 SSD Middle frame Keyboard Power adapter and power cord 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 62: System Board

    Attention: Do not open your computer or attempt any repair before reading and understanding the Chapter 2 “Important service information” on page 27. IdeaCentre A540-24ICB and A540-24API Hardware Maintenance Manual...

  • Page 63: External Options

    External options You can connect external options to your computer, such as external speakers, a printer, or a scanner. For some external options, you must install additional software in addition to making the physical connection. When installing an external option, see Chapter 3 “Product overview” on page 29 to identify the required connector.

  • Page 64: Computer Back Cover

    CAUTION: Do not lift from the top of the LCD panel so that the integrated camera and microphone module will not be broken. IdeaCentre A540-24ICB and A540-24API Hardware Maintenance Manual...
  • Page 65 3. Remove the screws. 4. Unplug the connectors. Chapter 6 Hardware removal and installation...
  • Page 66 5. Detach the computer chassis from the computer back cover. 6. Remove the computer back cover. IdeaCentre A540-24ICB and A540-24API Hardware Maintenance Manual...
  • Page 67 7. Install the new computer back cover. 8. Attach the computer chassis to the computer back cover. Chapter 6 Hardware removal and installation...

  • Page 68: System Board Frame

    11. Place the computer in an upright position. 12. Reinstall the hinge cover. System board frame Prerequisite Before you start, read Chapter 2 “Important service information” on page 27 and print the following instructions. IdeaCentre A540-24ICB and A540-24API Hardware Maintenance Manual...
  • Page 69 Before you open the system board frame, turn off the computer and wait several minutes until the computer is cool. Replacement procedure 1. Remove the hinge cover. See “Hinge cover” on page 57. 2. Remove the computer back cover. See “Computer back cover” on page 58. 3.

  • Page 70: Memory Module

    Before you start, read Chapter 2 “Important service information” on page 27 and print the following instructions. Attention: Do not touch the contact edge of the memory module. Otherwise, the memory module might get damaged. IdeaCentre A540-24ICB and A540-24API Hardware Maintenance Manual...
  • Page 71 Replacement procedure 1. Remove the hinge cover. See “Hinge cover” on page 57. 2. Remove the computer back cover. See “Computer back cover” on page 58. 3. Remove the system board frame. See “System board frame” on page 62. 4. Disengage the latches. 5.

  • Page 72: System Fan

    Before you start, read Chapter 2 “Important service information” on page 27 and print the following instructions. The system fan might be very hot. Before you open the hinge cover, turn off the computer and wait several minutes until the computer is cool. IdeaCentre A540-24ICB and A540-24API Hardware Maintenance Manual...
  • Page 73 Replacement procedure 1. Remove the hinge cover. See “Hinge cover” on page 57. 2. Remove the computer back cover. See “Computer back cover” on page 58. 3. Remove the system board frame. See “System board frame” on page 62. 4. Remove the system fan connector from the system board. 5.
  • Page 74 6. Remove the system fan. 7. Install the new system fan. IdeaCentre A540-24ICB and A540-24API Hardware Maintenance Manual...

  • Page 75: Heat Sink

    8. Secure the system fan with the screws. 9. Connect the system fan connector to the system board. 10. Reinstall the removed parts. Heat sink Prerequisite Before you start, read Chapter 2 “Important service information” on page 27 and print the following instructions.
  • Page 76 • You might have to gently twist the heat sink to free it from the microprocessor. • Do not touch the thermal grease while handling the heat sink. 6. Remove the heat sink. IdeaCentre A540-24ICB and A540-24API Hardware Maintenance Manual...

  • Page 77: Wi-Fi Card

    7. Install the new heat sink. 8. Secure the heat sink with the screws. 9. Reinstall the removed parts. Wi-Fi card Prerequisite Before you start, read Chapter 2 “Important service information” on page 27 and print the following instructions. Replacement procedure 1.
  • Page 78 4. Remove the screw. 5. Disconnect the Wi-Fi antenna cables from the Wi-Fi card. IdeaCentre A540-24ICB and A540-24API Hardware Maintenance Manual...
  • Page 79 6. Remove the Wi-Fi card. 7. Install the new Wi-Fi card. Chapter 6 Hardware removal and installation...

  • Page 80: M.2 Ssd

    1. Remove the hinge cover. See “Hinge cover” on page 57. 2. Remove the computer back cover. See “Computer back cover” on page 58. 3. Remove the system board frame. See “System board frame” on page 62. IdeaCentre A540-24ICB and A540-24API Hardware Maintenance Manual...
  • Page 81 4. Remove the thermal pad from the M.2 SSD. 5. Remove the screw. Chapter 6 Hardware removal and installation...
  • Page 82 6. Remove the M.2 SSD. 7. Install the new M.2 SSD. IdeaCentre A540-24ICB and A540-24API Hardware Maintenance Manual...
  • Page 83 8. Secure the M.2 SSD with the screw. 9. Install the thermal pad to the M.2 SSD. 10. Reinstall the removed parts. Chapter 6 Hardware removal and installation...

  • Page 84: Microprocessor

    3. Remove the system board frame. See “System board frame” on page 62. 4. Remove the system fan. See “System fan” on page 66. 5. Remove the heat sink. See “Heat sink” on page 69. IdeaCentre A540-24ICB and A540-24API Hardware Maintenance Manual...
  • Page 85 6. Slightly push the lever to unlock the microprocessor retainer. 7. Carefully remove the microprocessor. Chapter 6 Hardware removal and installation...
  • Page 86 8. Install the new microprocessor. 9. Slightly pull the lever down to lock the microprocessor retainer. 10. Reinstall the removed parts. IdeaCentre A540-24ICB and A540-24API Hardware Maintenance Manual...

  • Page 87: System Board

    System board Prerequisite Before you start, read Chapter 2 “Important service information” on page 27 and print the following instructions. 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.
  • Page 88 7. Carefully remove the system board. Note: Carefully handle the system board by its edges. 8. Install the new system board by aligning the five screw holes in the new system board with the corresponding mounting studs. IdeaCentre A540-24ICB and A540-24API Hardware Maintenance Manual...

  • Page 89: Speakers

    9. Connect the cable connectors to the system board. See “System board” on page 56. 10. Reinstall the removed parts one by one in the reversed sequence. Speakers Prerequisite Before you start, read Chapter 2 “Important service information” on page 27 and print the following instructions.
  • Page 90 4. Disconnect the speakers cable from the system board. 5. Remove the screws. IdeaCentre A540-24ICB and A540-24API Hardware Maintenance Manual...
  • Page 91 6. Remove the speakers. 7. Install the new speakers. Chapter 6 Hardware removal and installation...

  • Page 92: Storage Drive

    Before you start, read Chapter 2 “Important service information” on page 27 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: IdeaCentre A540-24ICB and A540-24API Hardware Maintenance Manual...
  • Page 93 • Replace the internal storage drive only for upgrade or repair. The internal storage drive is not designed for frequent changes or replacement. • Before replacing the internal storage drive, make a backup copy of all the data that you want to keep. •...
  • Page 94 5. Remove the storage drive from the bracket. 6. Remove the screws that secure the storage drive cable connector. IdeaCentre A540-24ICB and A540-24API Hardware Maintenance Manual...
  • Page 95 7. Disconnect the storage drive cable. 8. Remove the screws that secure the storage drive metal shield. Chapter 6 Hardware removal and installation...
  • Page 96 9. Remove the storage drive metal shield. 10. Install the storage drive metal shield. IdeaCentre A540-24ICB and A540-24API Hardware Maintenance Manual...
  • Page 97 11. Secure the storage drive metal shield with the screws. 12. Connect the storage drive cable. Chapter 6 Hardware removal and installation...
  • Page 98 13. Secure the storage drive cable connector with the screws. 14. Install the new storage drive to the bracket. IdeaCentre A540-24ICB and A540-24API Hardware Maintenance Manual...

  • Page 99: Lcd Panel

    15. Insert the storage drive in the storage drive door. 16. Lock the storage drive door. 17. Reinstall the removed parts. LCD panel Prerequisite Before you start, read Chapter 2 “Important service information” on page 27 and print the following instructions.
  • Page 100 10. Remove the system board. See “System board” on page 81. 11. Remove the storage drive. See “Storage drive” on page 86. 12. Remove the screws that secure the panel housing. 13. Remove the panel housing. IdeaCentre A540-24ICB and A540-24API Hardware Maintenance Manual...
  • Page 101 14. Remove the screws. 15. Remove the middle frame. Chapter 6 Hardware removal and installation...
  • Page 102 16. Remove the screws from the LCD panel. 17. Disconnect the cables from the LCD panel. IdeaCentre A540-24ICB and A540-24API Hardware Maintenance Manual...
  • Page 103 18. Connect the cables to the new LCD panel. 19. Secure the LCD panel with the screws. Chapter 6 Hardware removal and installation...
  • Page 104 20. Install the middle frame. 21. Secure the middle frame with the screws. IdeaCentre A540-24ICB and A540-24API Hardware Maintenance Manual...

  • Page 105: Camera Module

    22. Install the panel housing. 23. Secure the panel housing with the screws. 24. Reinstall the removed parts. Camera module Prerequisite Before you start, read Chapter 2 “Important service information” on page 27 and print the following instructions. Replacement procedure 1.
  • Page 106 12. Remove the panel housing. See “LCD panel” on page 93. 13. Remove the screws that secure the camera module in the panel housing. 14. Pull the camera module out of the panel housing. IdeaCentre A540-24ICB and A540-24API Hardware Maintenance Manual...
  • Page 107 15. Remove the screws from the metal shield of camera module. 16. Remove the screws from the camera module. Chapter 6 Hardware removal and installation...
  • Page 108 17. Remove the camera module. 18. Secure the metal shield of the camera module with the screws. IdeaCentre A540-24ICB and A540-24API Hardware Maintenance Manual...
  • Page 109 19. Secure the new camera module with the screws. 20. Insert the camera module in the panel housing. Chapter 6 Hardware removal and installation...

  • Page 110: Computer Upper Cover

    Replacement procedure 1. Remove the hinge cover. See “Hinge cover” on page 57. 2. Detach the computer chassis from the computer back cover. See “Computer back cover” on page 58. IdeaCentre A540-24ICB and A540-24API Hardware Maintenance Manual...
  • Page 111 3. Remove the rubber feet. 4. Remove the screws. Chapter 6 Hardware removal and installation...
  • Page 112 5. Remove the computer upper cover. 6. Install the new computer upper cover. IdeaCentre A540-24ICB and A540-24API Hardware Maintenance Manual...

  • Page 113: Power Switch Board

    7. Secure the computer upper cover with screws. 8. Install the rubber feet. 9. Attach the computer chassis to the computer back cover. See “Computer back cover” on page 58. 10. Reinstall the hinge cover. Power switch board Prerequisite Before you start, read Chapter 2 “Important service information” on page 27 and print the following instructions.
  • Page 114 2. Remove the computer upper cover. See “Computer upper cover” on page 104. 3. Remove the screws. 4. Remove the power switch board. IdeaCentre A540-24ICB and A540-24API Hardware Maintenance Manual...

  • Page 115: Subwoofer

    5. Install the new power switch board. 6. Secure the power switch board with screws. 7. Reinstall the removed parts. Subwoofer Prerequisite Before you start, read Chapter 2 “Important service information” on page 27 and print the following instructions. Replacement procedure 1.
  • Page 116 3. Disconnect the subwoofer cables. 4. Remove the screws that secure the subwoofer. IdeaCentre A540-24ICB and A540-24API Hardware Maintenance Manual...
  • Page 117 5. Remove the subwoofer. 6. Install the new subwoofer. Chapter 6 Hardware removal and installation...

  • Page 118: Wireless Charging Module

    1. Remove the hinge cover. See “Hinge cover” on page 57. 2. Remove the computer upper cover. See “Computer upper cover” on page 104. 3. Remove the speakers. See “Subwoofer” on page 109. IdeaCentre A540-24ICB and A540-24API Hardware Maintenance Manual...
  • Page 119 4. Remove the screws. 5. Turn the wireless charging module. Chapter 6 Hardware removal and installation...
  • Page 120 6. Disconnect the cable connectors from the wireless charging module. 7. Remove the wireless charging LED. IdeaCentre A540-24ICB and A540-24API Hardware Maintenance Manual...
  • Page 121 8. Install the new wireless charging LED. 9. Connect the cable connectors to the wireless charging module. Chapter 6 Hardware removal and installation...

  • Page 122: Dc-In Board

    Before you start, read Chapter 2 “Important service information” on page 27 and print the following instructions. Replacement procedure 1. Remove the hinge cover. See “Hinge cover” on page 57. 2. Remove the computer upper cover. See “Computer upper cover” on page 104. IdeaCentre A540-24ICB and A540-24API Hardware Maintenance Manual...
  • Page 123 3. Disconnect all the cable connectors from the DC-in board. 4. Remove the screws. 5. Remove the DC-in board. Chapter 6 Hardware removal and installation...

  • Page 124: System Stand

    Before you start, read Chapter 2 “Important service information” on page 27 and print the following instructions. Replacement procedure 1. Remove the hinge cover. See “Hinge cover” on page 57. 2. Remove the computer upper cover. See “Computer upper cover” on page 104. IdeaCentre A540-24ICB and A540-24API Hardware Maintenance Manual...
  • Page 125 3. Remove the power switch board. See “Power switch board” on page 107. 4. Remove the screws. 5. Remove the system stand. Chapter 6 Hardware removal and installation...
  • Page 126 6. Install the new system stand. 7. Secure the system stand with the screws. 8. Reinstall the removed parts. IdeaCentre A540-24ICB and A540-24API Hardware Maintenance Manual...
  • Page 127 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 128 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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