Lenovo 4229, 4223, 4228 manual Closing the microprocessor retainer

Models: 4229 4223 4228

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12.Carefully lift the failing system board out of the chassis.

13.Position the new system board into the chassis so that the screw holes in the new system board are aligned with those in the chassis. Install the ten screws that secure the system board to the chassis by following the sequence from 10 to 1 .

14.Remove the microprocessor socket cover(s) from the new system board.

15.Install the memory modules, PCI cards, battery, microprocessor, heat sink and fan assembly, hard disk drive enablement module (if applicable), and the hard disk drive fan assembly that you removed from the failing system board to the new system board.

16.Connect all cables to the system board. See “Locating parts on the system board” on page 58.

17.Go to “Completing the parts replacement” on page 104.

The failing system board must be returned with microprocessor socket covers to protect the pins during shipping and handling. Install the microprocessor socket covers removed from the new system board on the failing system board.

Note: The microprocessor socket cover installation procedure should be performed on both microprocessor sockets on the failing system board.

To install the microprocessor socket cover on the failing system board:

1. Pivot the microprocessor retainer downward to close the retainer.

Figure 52. Closing the microprocessor retainer

2.Gently press down the small handle 1 , and then push the handle inward to secure it. Then gently press down the small handle 2 and push the handle inward to lock the microprocessor retainer into position.

Chapter 10. Replacing FRUs 101

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Lenovo 4229, 4223, 4228 manual Closing the microprocessor retainer

4229, 4223, 4228 specifications

Lenovo has long been recognized for its commitment to producing high-quality computing solutions, and the ThinkPad line is no exception. Among its various models, the Lenovo ThinkPad series 4228, 4223, and 4229 stand out for their robust features and reliable performance, making them ideal choices for business and professional use.

The Lenovo ThinkPad 4228 series is engineered with a focus on durability and performance. One of its key features is the powerful Intel Core processor range, which ensures that users can manage demanding applications and multitask efficiently. Alongside this, the device typically comes equipped with ample RAM, providing speed and responsiveness that enhances productivity.

Moving to the ThinkPad 4223, it streamlines user experience with advanced connectivity options. The inclusion of multiple USB ports, HDMI, and Ethernet capabilities allows for seamless integration with various devices and networks. The 4223 model often houses a backlit keyboard, enabling users to work effortlessly in low-light environments. This model puts a strong emphasis on portability, making it a reliable companion for professionals on the move.

The ThinkPad 4229 takes connectivity a step further by offering options like Wi-Fi 6 and Bluetooth, ensuring fast and stable connections whether in the office or on the go. This model is often equipped with a higher resolution display, contributing to a better viewing experience for video conferencing and presentations. Its extended battery life is a notable feature, allowing users to remain productive without the constant need for recharging.

All three models in the 422x series boast Lenovo’s robust security features, including fingerprint readers and TPM (Trusted Platform Module), which safeguard sensitive data against unauthorized access. Furthermore, the reputation of Lenovo ThinkPads for their exceptional keyboard layout ensures that users can type comfortably over extended periods, reducing strain and increasing efficiency.

In summary, the Lenovo ThinkPad 4228, 4223, and 4229 models represent a blend of power, durability, and user-friendly design. With their focus on connectivity, performance, and security, these laptops cater perfectly to the needs of professionals and businesses, confirming Lenovo's status as a leading manufacturer in the world of computing technology. Whether you need a rugged workhorse for heavy tasks or a portable device for meetings, the ThinkPad series provides versatile solutions to meet any requirement.