Replacing the system board

Attention

Do not open your computer or attempt any repair before reading and understanding the “Important safety information” in the ThinkCentre Safety and Warranty Guide that came with your computer. To obtain a copy of the ThinkCentre Safety and Warranty Guide, go to:http://www.lenovo.com/support

This section provides instructions on how to replace the system board.

CAUTION:

The heat sink and microprocessor might be very hot. Turn off the computer and wait three to five minutes to let the computer cool before removing the computer cover.

To replace the system board, do the following:

1.Remove the computer cover. See “Removing the computer cover” on page 68.

2.Take notes of the locations of all parts and all cable connectors on the system board. See “Locating components” on page 66 and “Locating parts on the system board” on page 67. Then, disconnect all the cables.

3.Remove the memory modules from the old system board. See “Installing or replacing a memory module” on page 70.

4.Remove the battery from the old system board. See “Replacing the battery” on page 72.

5.Remove the heat sink from the old system board. See “Replacing the heat sink” on page 76.

6.Remove the microprocessor from the old system board. See “Replacing the microprocessor” on page 79.

7.Remove the screws that secure the old system board. Then, carefully remove the old system board out of the chassis.

8.Place the old system board on a clean and flat surface.

9.Position the new system board so that the screw holes are aligned with the mounting studs on the computer cover.

10.Install the screws to secure the new system board in place.

11.Install the memory modules, battery, microprocessor, and heat sink that you removed from the old system board to the new system board.

12.Connect all the cables to the new system board. See “Locating parts on the system board” on page 67.

What to do next:

•To work with another piece of hardware, go to the appropriate section.

•To complete the replacement, go to “Completing the parts replacement” on page 84.

The failing system board must be returned with a microprocessor socket cover to protect the pins during shipping and handling.

To install the microprocessor socket cover, do the following:

1.Remove the microprocessor from the microprocessor socket. See “Replacing the microprocessor” on page 79.

2.Close the microprocessor retainer and lock it into position with the small handle.

82Hardware Maintenance Manual

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Lenovo 5214, 5354, 3425, 3980 manual Replacing the system board
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5354, 3980, 5214, 3425 specifications

The Lenovo 3425, 5214, 3980, and 5354 are part of Lenovo's diverse lineup of laptops, each designed with unique features and technologies catered to various user needs.

Starting with the Lenovo 3425, this model stands out for its portability and performance. It typically offers a lightweight design with a robust build quality, ideal for on-the-go professionals or students. The laptop is powered by AMD processors, ensuring good processing power for multitasking and productivity tasks. With a comfortable keyboard and intuitive layout, users can enjoy a smooth typing experience. The screen is often equipped with an HD display, providing clear visuals for work or entertainment. Lenovo’s TruVivid technology enhances color accuracy, making it suitable for graphic design and photo editing.

The Lenovo 5214 emphasizes versatility and connectivity. It usually features an array of ports, including USB-C, HDMI, and Ethernet, allowing users to connect various peripherals easily. This model is often tailored for business professionals, with enhanced security features such as a fingerprint reader and TPM (Trusted Platform Module) for encrypted data storage. The display is often anti-glare, making it convenient for use in different lighting conditions. Additionally, the battery life is commendable, ensuring users can work for extended periods without frequent recharges.

The Lenovo 3980 is geared towards gamers and creative professionals. This model typically includes higher-end graphics options such as NVIDIA or AMD GPUs, enabling smooth gameplay and graphic-intensive applications. A high-refresh-rate display enhances gaming experiences, allowing for fluid motion and reduced blur. The design often incorporates advanced thermal management to keep the laptop cool during long gaming sessions, while customizable RGB keyboard backlighting offers a personalized touch.

Lastly, the Lenovo 5354 is designed for multimedia enthusiasts, featuring enhanced audio technologies and high-resolution displays. This model often integrates Dolby Audio for immersive sound quality, elevating the multimedia consumption experience. Its larger screen size and higher pixel density make it ideal for watching movies or editing videos. Additionally, the laptop's optimized battery efficiency ensures that users can enjoy their favorite media without frequent interruptions from charging.

Each of these Lenovo models embodies a commitment to quality and performance, tailored to meet the diverse demands of modern users, from business professionals to gamers and creative artists.
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