Lenovo 104, 7548, 7539, 154 manual Screws that secure the heat sink and fan assembly

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6.Follow this sequence to remove the four screws that secure the heat sink and fan assembly to the system board:

a.Partially remove screw

b.Partially remove screw

1 , then fully remove screw

3 , then fully remove screw

2 , and then fully remove screw

4 , and then fully remove screw

1.

3.

Note: Carefully remove the four screws from the system board to avoid any possible damage to the system board. The four screws cannot be removed from the heat sink and fan assembly.

Figure 19. Screws that secure the heat sink and fan assembly

7.Lift the heat sink and fan assembly off the system board.

Notes:

a.You might have to gently twist the heat sink and fan assembly to free it from the microprocessor.

b.When handling the heat sink and fan assembly, do not touch the thermal grease on the bottom of the heat sink and fan assembly.

8.Place the new heat sink and fan assembly on the system board so that the four screws are aligned with the corresponding holes in the system board. Make sure that you properly place the new heat sink and fan assembly so that you can easily connect the new heat sink and fan assembly cable to the microprocessor fan connector on the system board.

9.Follow this sequence to install the four screws to secure the new heat sink and fan assembly, as shown in Figure 19 “Screws that secure the heat sink and fan assembly” on page 25:

a.Partially tighten screw

b.Partially tighten screw

1 , then fully tighten screw

3 , then fully tighten screw

2 , and then fully tighten screw

4 , and then fully tighten screw

1.

3.

10.Connect the new heat sink and fan assembly cable to the microprocessor fan connector on the system board. See “Locating parts on the system board” on page 9.

Chapter 2. Installing or replacing hardware 25

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Contents ThinkCentre User Guide Page ThinkCentre User Guide First Edition November Copyright Lenovo Contents Appendix A. Notices Important safety information Vi ThinkCentre User Guide Product overview FeaturesConnectivity Security features SpecificationsSoftware provided with your Windows operating system Software overviewLenovo ThinkVantage Tools Lenovo ThinkVantage Toolbox LocationsRear connector and part locations Locating connectors and parts on the rear of your computerLocating components Connector DescriptionComponent locations Locating parts on the system boardSystem board part locations Locating internal drivesDrive bay locations ThinkCentre User Guide Installing or replacing hardware Installing or replacing hardwareInstalling external options Handling static-sensitive devicesRemoving the computer cover Removing the computer coverRemoving the front bezel Removing and reinstalling the front bezelReinstalling the front bezel Accessing the system board components and drivesPivoting the drive bay assembly upward Installing or replacing a PCI cardThinkCentre User Guide Removing the PCI card What to do next Installing or replacing a memory moduleRemoving the memory module Installing the memory module Replacing the batteryRemoving the old battery Replacing the heat sink and fan assemblyRemoving the heat sink fan duct Screws that secure the heat sink and fan assembly Replacing the microprocessor Installing the heat sink fan ductAccessing the microprocessor Removing the microprocessor Replacing the power supply assemblyInstalling or replacing hardware Removing the power supply assembly Installing the power supply assembly Replacing the optical drive Removing the optical drive screws Slide the optical drive out of the front of the computer Replacing the hard disk drive Installing the optical drivePivoting the drive bay assembly Removing the hard disk drive Replacing the card reader Installing the hard disk driveRemoving the card reader Replacing the front fan assemblyRemoving the front fan assembly Replacing the keyboard Installing the front fan assemblyReplacing the mouse Keyboard connectorsMouse connectors Completing the parts replacementReinstalling the computer cover Obtaining device drivers Basic security featuresIntegrated cable lock Installing an integrated cable lockPassword protection Erasing a lost or forgotten password clearing CmosPadlock Installing or replacing hardware ThinkCentre User Guide Recovery information Creating and using recovery mediaCreating recovery media Using recovery media Performing backup and recovery operationsPerforming a backup operation Using the Rescue and Recovery workspace Performing a recovery operationCreating and using a rescue medium Using a rescue mediumCreating a rescue medium Solving recovery problems Installing or reinstalling device driversThinkCentre User Guide Starting the Setup Utility program Using the Setup Utility programViewing or changing settings Using passwordsPower-on password Password considerationsAdministrator password Setting, changing, or deleting a passwordSelecting a startup device Selecting a temporary startup deviceViewing or changing the startup device sequence Exiting the Setup Utility program Using system programs Updating flashing the Bios from a discUpdating system programs Recovering from a Post and Bios update failure Updating flashing the Bios from your operating systemUpdating system programs ThinkCentre User Guide Basic troubleshooting Troubleshooting and diagnostic programsDiagnostic programs Lenovo ThinkVantage ToolboxPC-Doctor for DOS Running the diagnostic program from the diagnostic disc Cleaning an optical mouseThinkCentre User Guide Information resources Getting information, help, and serviceOnline Books folder Lenovo ThinkVantage ToolsSafety and warranty Access HelpHelp and service Lenovo WelcomeCalling for service Using the documentation and diagnostic programsPurchasing additional services Using other servicesAppendix A. Notices European conformance CE mark Trademarks Television output noticeCRU IndexKeyboard replacing Lenovo Customer Support Center Solving recovery problems Starting the Setup Utility program ThinkCentre User Guide Page 0A22638

7539, 154, 7548, 104 specifications

Lenovo is known for its innovative technology and cutting-edge devices, and the model 104,7548,154,7539 is no exception. This device integrates a range of features designed to enhance user experience and productivity. One of the standout features is its powerful processing capability, leveraging advanced Intel or AMD processors that ensure seamless multitasking and performance during demanding applications.

The display of the Lenovo model 104,7548,154,7539 is another highlight. It boasts a high-resolution screen, offering crisp visuals and vibrant colors that make it suitable for everything from graphic design to casual media consumption. The device's display often includes features like anti-glare technology, which enhances usability in various lighting conditions.

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Battery life is a crucial aspect of portable devices, and this Lenovo model does not disappoint. With an efficient power management system, users can work for extended periods without needing to recharge, making it an ideal choice for professionals on the go or students attending classes.

Security features are taken seriously in the Lenovo model 104,7548,154,7539. With options such as biometric fingerprint readers and facial recognition technologies, users can rest assured that their data remains secure. Additionally, Lenovo’s robust software suite typically includes tools for data protection and privacy.

Lastly, the design of the device is user-friendly, combining functionality with aesthetics. It features a comfortable keyboard with excellent key travel for efficient typing and has a sleek, modern appearance that appeals to a wide audience. Whether for business, creative, or personal use, the Lenovo model 104,7548,154,7539 stands out as a versatile and powerful option in the competitive tech landscape.