Lenovo 4223, 4228 Replacing the power supply assembly, Installing the microprocessor socket cover

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Figure 53. Securing the microprocessor in the socket

3.Align the notch 1 of the microprocessor socket cover with the alignment key 2 of the microprocessor socket. Lower the socket cover straight down into the microprocessor socket on the system board.

Figure 54. Installing the microprocessor socket cover

Note: Your microprocessor socket and cover might look slightly different from the illustration.

Replacing the power supply assembly

Attention: Do not open your computer or attempt any repair before reading and understanding the “Important Safety Information” on page 1.

This document provides instructions on how to replace the power supply assembly.

CAUTION:

Never remove the cover on a power supply or any part that has the following label attached.

102ThinkStation Hardware Maintenance Manual

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Contents ThinkStation Hardware Maintenance Manual Page ThinkStation Hardware Maintenance Manual First Edition April Copyright Lenovo Contents Appendix A. Notices 109 Important Safety Information About this manualThinkStation Hardware Maintenance Manual Safety information General safetyElectrical safety ThinkStation Hardware Maintenance Manual Voltage-selection switch Safety inspection guideSafety notices multi-lingual translations Handling electrostatic discharge-sensitive devicesGrounding requirements To Connect To Disconnect ≥18 kg 37 lbs ≥32 kg 70.5 lbs ≥55 kg 121.2 lbs Safety information ≥18 kg 37 lbs ≥32 kg 70.5 lbs ≥55 kg 121.2 lbs Perigo Para Conectar Para DesconectarPrecaución Safety information ThinkStation Hardware Maintenance Manual Safety information ThinkStation Hardware Maintenance Manual Connexion Déconnexion Vorsicht Achtung Arbeitsschutzrichtlinien beim Anheben der Maschine beachten Safety information Pericolo Attenzione Per collegarsi Per scollegarsiPrestare attenzione nel sollevare lapparecchiatura Safety information Peligro No debe Adopte procedimientos seguros al levantar el equipo Specifications General informationLenovo ThinkVantage Tools Lenovo Solution Center Product RecoveryThinkVantage Rescue and Recovery Lenovo WelcomeAdditional information resources ThinkStation Hardware Maintenance Manual Problem determination tips General CheckoutThinkStation Hardware Maintenance Manual Diagnostics ThinkStation Hardware Maintenance Manual Using the Setup Utility program Starting the Setup Utility programViewing and changing settings Using passwordsPassword considerations Power-On PasswordAdministrator Password Hard Disk PasswordErasing lost or forgotten passwords clearing Cmos Enabling or disabling a deviceSelecting a startup device Enabling ErP compliance mode and Deep Sx Selecting a temporary startup deviceSelecting or changing the startup device sequence Exiting the Setup Utility program ThinkStation Hardware Maintenance Manual Configuring RAID Configuring RAID with Intel RSTeInstalling Sata or SAS hard disk drives Entering the Intel RSTe configuration utility RAID Level Installing Sata or SAS hard disk drives Entering the LSI MegaRAID Bios configuration utility Setting the hot spare hard disk drive Symptom-to-FRU Index Hard disk drive boot errorPower Supply Problems Beep symptomsPost error codes Beep Symptom FRU/ActionLong and 3 short beeps Keyboard error Long and 9 short beeps Bios ROM errorMiscellaneous error messages Post Error Message Description/ActionMessage/Symptom FRU/Action Check power supply and signal cable connections Undetermined problems First device networkSecond device hard disk ThinkStation Hardware Maintenance Manual Front connector, control, and indicator locations LocationsLocating connectors on the rear of your computer Locating major FRUs and CRUsLocating major FRUs and CRUs Number FRU description Self-service CRU Optional-service CRU System board part locations ThinkStation Hardware Maintenance Manual Locating internal drives Drive bay locationsThinkStation Hardware Maintenance Manual Installing or replacing hardware Installing external optionsReplacing FRUs Handling static-sensitive devicesRemoving the computer cover Removing and reinstalling the front bezel Removing the computer coverInstalling or replacing a PCI card What to do nextOpening the PCI card retainer Removing a PCI card Installing or replacing a memory module Removing the memory fan duct Removing a memory module Installing or replacing the optical drive Installing a memory moduleRemoving the optical drive Installing the optical drive retainer Connecting the optical drive Replacing the card readerRemoving the card reader Replacing the battery Installing the card readerReplacing the heat sink and fan assembly Removing the old batteryRemoving the heat sink and fan assembly Replacing the hard disk drive fan assembly Replacing the rear fan assembly Removing the hard disk drive fan assemblyRemoving the rear fan assembly Installing or replacing a hard disk drive Installing the rear fan assemblyRemoving the hard disk drive Installing the hard disk drive into the bracket Installing the hard disk drive Installing or replacing a hard disk drive enablement module Removing the hard disk drive enablement moduleReplacing the front audio and USB assembly Installing a new hard disk drive enablement moduleReplacing the internal speaker Installing or replacing the microprocessor Removing the internal speakerInstalling the second microprocessor Opening the handles Removing the microprocessor Installing the microprocessor Replacing a microprocessor Opening the handles Opening the microprocessor retainer Do not touch the pins Replacing the system board ThinkStation Hardware Maintenance Manual Closing the microprocessor retainer Replacing the power supply assembly Installing the microprocessor socket coverRemoving six screws that secure the power supply assembly Completing the parts replacement Additional service information Updating flashing the Bios from your operating system Recovering from a POST/BIOS update failurePower management Automatic configuration and power interface Acpi BiosAutomatic Power-On features System memory speedDimm operating voltage Microprocessor model Memory frequency Appendix A. Notices Television output notice European conformance CE markTrademarks Index 111Replacing Battery
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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.