Lenovo 4229, 4223, 4228 Cleaning your computer, Computer, Keyboard, Optical mouse, Display screen

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Cleaning your computer

It is a good practice to clean your computer periodically to protect the surfaces and ensure trouble-free operation.

CAUTION:

Be sure to turn off the computer and monitor power switches before cleaning the computer and monitor screen.

Computer

Use only mild cleaning solutions and a damp cloth to clean the painted surfaces of the computer.

Keyboard

To clean your computer keyboard, do the following:

1.Apply some isopropyl rubbing alcohol to a soft, dust-free cloth.

2.Wipe each keytop surface with the cloth. Wipe the keys one by one; if you wipe several keys at a time, the cloth may hook onto an adjacent key and possibly damage it. Make sure that no liquid drips onto or between the keys.

3.To remove any crumbs or dust from beneath the keys, you can use a camera blower with a brush or cool air from a hair dryer.

Note: Avoid spraying cleaner directly onto the display or the keyboard.

Optical mouse

This section provides instructions on how to clean an optical mouse.

An optical mouse uses a light-emitting diode (LED) and an optical sensor to navigate the pointer. If the pointer on the screen does not move smoothly with the optical mouse, you might need to clean the mouse.

To clean an optical mouse, do the following:

1.Turn off your computer.

2.Disconnect the mouse cable from the computer.

3.Turn the mouse upside down to check the lens.

a.If there is a smudge on the lens, gently clean the area with a plain cotton-tipped swab.

b.If there is debris in the lens, gently blow the debris away from the area.

4.Check the surface on which you are using the mouse. If you have a very intricate picture or pattern beneath the mouse, it may be difficult for the digital signal processor (DSP) to determine changes in the mouse position.

5.Reconnect the mouse cable to the computer.

6.Turn your computer back on.

Display screen

Dust buildup compounds problems associated with glare. Remember to clean your monitor screen periodically. See “Cleaning a flat-panel monitor surface” on page 83 or “Cleaning a glass-screen surface” on page 84.

Cleaning a flat-panel monitor surface

If you have a flat-panel computer display that has a flexible film surface, do the following to clean the special surface. Wipe it gently with a soft, dry cloth, or blow on the screen to remove grit and other loose particles. Then moisten a cloth with LCD cleaner and wipe the screen surface.

Chapter 10. Preventing problems

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Contents ThinkStation User Guide First Edition April Copyright Lenovo Contents Using the Setup Utility Program Appendix A. System memory Speed 107 Appendix B. Notices 109 Iv ThinkStation User Guide Static electricity prevention Important safety informationService and upgrades Extension cords and related devices Power cords and power adaptersHeat and product ventilation Plugs and outletsExternal devices Operating environment Modem safety informationLaser compliance statement Power supply statementCleaning and maintenance ThinkStation User Guide Product overview FeaturesConnectivity System management featuresInput/Output I/O features Preinstalled operating system Power supplySecurity features Preinstalled software programsDimensions SpecificationsSoftware provided by Lenovo Software overviewLocations ThinkVantage Rescue and RecoveryAdobe Reader Antivirus software Front connector, control, and indicator locations Connector Description Locating connectors on the rear of your computerLocating components ConnectorSystem board part locations Locating parts on the system boardProduct overview Drive bay locations Locating internal drivesMachine type and model label Machine type and model labelThinkStation User Guide Using Windows shortcut keys Using your computerFrequently asked questions Using the keyboardAbout your computer audio Using the blue ThinkVantage buttonUsing the wheel mouse Adjusting audioAdding the volume icon to the taskbar Setting the volume from the desktopSetting the volume from Control Panel Using CDs and DVDsRecording a CD or DVD Playing a CD or DVDComfort Accessibility and comfortYou and your computer Arranging your workspaceElectrical outlets and cable lengths Glare and lightingAir circulation Moving your computer to another country or region Replacement power cordsRegister your computer with Lenovo ThinkStation User Guide Locking the computer cover Security featuresSecurity Locking the computer cover Installing a padlockInstalling a padlock Attaching an integrated cable lock Using passwordsBios passwords Protecting data against viruses Windows passwordsUsing and understanding firewalls ThinkStation User Guide Handling static-sensitive devices Installing or replacing hardwareInstalling or replacing hardware Installing external optionsRemoving the computer cover Removing the computer coverWhat to do next Removing and reinstalling the front bezelOpening the PCI card retainer Installing or replacing a PCI cardRemoving a PCI card Installing or replacing a memory module Removing the memory fan duct Removing a memory module Installing a memory module Installing or replacing the optical driveRemoving the optical drive Installing the optical drive retainer Replacing the card reader Connecting the optical driveRemoving the card reader Installing the card reader Replacing the batteryRemoving the old battery Replacing the heat sink and fan assemblyRemoving the heat sink and fan assembly Replacing the hard disk drive fan assembly Removing the hard disk drive fan assembly Replacing the rear fan assemblyRemoving the rear fan assembly Installing the rear fan assembly Installing or replacing a hard disk driveRemoving the hard disk drive Installing the hard disk drive into the bracket Installing the hard disk drive Removing the hard disk drive enablement module Installing or replacing a hard disk drive enablement moduleInstalling a new hard disk drive enablement module Replacing the front audio and USB assemblyReplacing the internal speaker Removing the internal speaker Replacing the keyboard or mouseConnecting the USB keyboard or mouse Completing the parts replacementObtaining device drivers ThinkStation User Guide Creating recovery media Recovery informationCreating and using recovery media Performing a backup operation Using recovery mediaPerforming backup and recovery operations Click the Restore your system from a backup icon Performing a recovery operationUsing the Rescue and Recovery workspace Creating a rescue medium Creating and using a rescue mediumUsing a rescue medium Reinstalling preinstalled device drivers Reinstalling preinstalled applications and device driversReinstalling preinstalled applications Solving recovery problems Reinstalling software programsReinstalling device drivers Recovery information ThinkStation User Guide Viewing and changing settings Using the Setup Utility programStarting the Setup Utility program Hard Disk Password Password considerationsPower-On Password Administrator PasswordSelecting a startup device Erasing lost or forgotten passwords clearing CmosEnabling or disabling a device Selecting or changing the startup device sequence Enabling ErP compliance mode and Deep SxSelecting a temporary startup device Exiting the Setup Utility program ThinkStation User Guide Installing Sata or SAS hard disk drives Configuring RAIDConfiguring RAID with Intel RSTe Entering the Intel RSTe configuration utility RAID Level Resetting hard disk drives to non-RAIDInstalling Sata or SAS hard disk drives Entering the LSI MegaRAID Bios configuration utility Setting the hot spare hard disk drive Updating system programs Using system programsUpdating flashing the Bios from a disc Click Downloads and drivers Updating flashing the Bios from your operating systemRecovering from a POST/BIOS update failure Getting the latest device drivers for your computer Preventing problemsUsing System Update Keeping your computer currentBasics Optical mouse Cleaning your computerComputer KeyboardMoving your computer Good maintenance practicesCleaning a glass-screen surface Basic troubleshooting Troubleshooting and diagnosticsTroubleshooting Troubleshooting procedureNo audio in Windows Audio problemsNo audio in DOS applications or games CD problemsSound comes from one external speaker only Black screen instead of DVD video DVD problemsCD or DVD does not work Invalid disc or no disc found message DVD movie will not playNo audio or intermittent audio while playing DVD movie Playback is very slow or choppyHard disk drive problems Mouse or pointing device does not work Intermittent problemsKeyboard, mouse, or pointing device problems All or some keys on the keyboard do not workWrong characters appear on the screen Monitor problemsWireless keyboard does not work Pointer on the screen does not move smoothly with the mouseImage appears to be flickering Your computer cannot connect to the network Networking problemsEthernet problems Image is discoloredAdapter stops working for no apparent reason Option problemsWake on LAN feature is not working Insufficient free hard disk drive space Performance and lockup problemsAn option that was just installed does not work An option that previously worked does not work nowExcessive number of fragmented files Insufficient memory Printer problemsSerial port problems Software does not work as expected Software problemsLenovo Solution Center USB problemsThinkStation User Guide Getting information, help, and service Lenovo Support Web site Help and serviceUsing the documentation and diagnostic programs Calling for servicePurchasing additional services Using other servicesThinkStation User Guide 107 Appendix A. System memory speedThinkStation User Guide 109 Appendix B. NoticesTrademarks Federal Communications Commission Declaration of Conformity Appendix C. Regulatory informationExport classification notice Electronic emissions noticesThinkStation User Guide Additional regulatory information ThinkStation User Guide 115 Appendix D. Weee and recycling informationImportant information for the European Directive 2002/96/EC Recycling informationRecycling information for Brazil Battery recycling information for TaiwanBattery recycling information for the European Union ThinkStation User Guide 119 IndexInstalling options memory module PCI card 121 ThinkStation User Guide
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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.
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