Lenovo 8820, 6139, 7348, 8338, 7637, 7479, 7626 Troubleshooting and diagnostics, Basic troubleshooting

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Chapter 6. Troubleshooting and diagnostics

This chapter describes some basic troubleshooting and diagnostic programs. If your computer problem is not described here, see Chapter 7, “Getting information, help, and service,” on page 57 for additional troubleshooting resources.

Basic troubleshooting

The following table provides information to help you troubleshoot your computer problem.

Symptom

Action

 

 

The computer does not start

Verify that:

when you press the power

v The power cord is plugged into the rear of the computer and into a working

button.

electrical outlet.

 

 

v If your computer has a secondary power switch on the back of the computer,

 

make sure that it is switched on.

 

v The power indicator on the front of the computer is on.

 

v The voltage is set to the correct setting for your country.

 

If you cannot correct the problem, have the computer serviced. Refer to the

 

safety and warranty information that is provided with your computer for a list of

 

service and support telephone numbers.

 

 

The monitor screen is blank.

Verify that:

 

v The monitor cable is securely attached to the rear of the monitor and to the

 

rear of the computer.

 

v The monitor power cord is plugged into the monitor and into a working

 

electrical outlet.

 

v The monitor is turned on and the brightness and contrast controls are set

 

correctly.

 

v The voltage is set to the correct setting for your country.

 

v The monitor signal cable is securely connected to the monitor and to the

 

monitor connector on the computer.

 

Note: If your computer has two monitor connectors, verify that your monitor is

 

connected to the option connector rather than the one in the rear of the system

 

board. For more information, see "Connecting your computer" in the ThinkCentre

 

Safety and Warranty Guide.

 

If you cannot correct the problem, have the computer serviced. Refer to the

 

safety and warranty information that is provided with your computer for a list of

 

service and support telephone numbers.

 

 

© Copyright Lenovo 2009

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Contents Page Page ThinkCentre User Guide Page Contents Iv User Guide Important safety information Vi User Guide Product overview FeaturesVideo subsystem Power Environment SpecificationsSoftware provided with your Windows operating system Software overviewPC-Doctor for Windows PE Locations Locating connectors on the front of your computerRear connector locations Locating connectors on the rear of your computerConnector Description Component locations Locating componentsShows the location of the parts on the system board Locating parts on the system boardHandling static-sensitive devices Installing options and replacing hardwareInstalling options and replacing hardware Opening the computer cover Installing external optionsOpening the computer cover Installing or replacing a memory moduleWhat to do next Removing the hard disk drive Replacing the hard disk driveReplacing the optical drive Installing the hard disk drive into the bracketRemoving the front bezel Installing the optical drive Replacing the batteryReplacing the heat sink Removing the old batteryRemoving the heat sink Replacing the microprocessor Accessing the microprocessorRemoving the microprocessor Replacing the adapter card Releasing the system board Replacing the internal speaker Replacing the front audio and USB assemblyRemoving the front bezel Removing the front audio and USB assembly Replacing the AC power adapterConnecting the AC power adapter Replacing the mouse Replacing the keyboardMouse connectors Completing the parts replacementCable routing Installing security features Integrated cable lock Password protectionErasing lost or forgotten passwords clearing Cmos Creating and using Product Recovery discs Recovery informationPerforming backup and recovery operations Using the Rescue and Recovery workspace Creating and using rescue media To use rescue media, do one of the following Creating and using a Recovery Repair disketteRecovering or installing device drivers Solving recovery problems Setting a rescue device in the startup sequenceUser Guide Using passwords Using the Setup UtilityStarting the Setup Utility program Viewing and changing settingsHard Disk User Password Password considerationsPower-On Password Privileged Access PasswordSelecting a temporary startup device Enabling or disabling a deviceSelecting a startup device Selecting or changing the startup device sequence Advanced settingsExiting from the Setup Utility program Updating system programs Using system programsUpdating flashing Bios from a disc Recovering from a POST/BIOS update failure Updating flashing Bios from your operating systemUpdating system programs User Guide Basic troubleshooting Troubleshooting and diagnosticsSymptom Action PC-Doctor for Windows PE Diagnostic programsLenovo System Toolbox Optical mouse Cleaning the mousePC-Doctor for DOS Non-optical mouse User Guide ThinkVantage Productivity Center Getting information, help, and serviceInformation resources Online Books folderLenovo Welcome Access HelpSafety and Warranty Calling for service Help and serviceUsing the documentation and diagnostic programs Purchasing additional services Using other servicesAppendix. Notices Trademarks Television output noticeCRU IndexPage Page User Guide Page Part Number 53Y9936

9961, 7187, 6136, 7345, 7629 specifications

The Lenovo 7479, 7629, 9961, 8338, and 7626 are part of Lenovo's diverse and innovative range of devices that cater to varying user needs, from business professionals to casual users. Each model comes with unique features and technological capabilities aimed at enhancing productivity and user experience.

Starting with the Lenovo 7479, it’s designed with portability in mind. Its lightweight structure doesn’t compromise on performance, as it integrates the latest Intel processors, ensuring responsiveness in multitasking scenarios. The 7479 also features a vibrant display that allows users to enjoy a rich visual experience, whether for work-related tasks or media consumption. With an emphasis on security, this model includes a fingerprint reader for secure access.

The Lenovo 7629 is another versatile option, becoming a favorite for those who require robust computing power without sacrificing battery life. Equipped with advanced cooling technology, the 7629 remains efficient during intense usage, such as graphic-intensive applications or gaming. Its high-resolution screen further complements its capabilities, providing sharp visuals and excellent color accuracy.

Model 9961 stands out due to its hybrid functionality, allowing users to switch between traditional laptop and tablet modes seamlessly. This flexibility is perfect for professionals who need to present or collaborate on the go. Additionally, the 9961 comes with a stylus pen, ideal for note-taking or creative tasks, ensuring versatility in its use.

The Lenovo 8338 appeals to gamers and multimedia enthusiasts. Its dedicated graphics card and high-refresh-rate display lead to an immersive experience, whether one is playing the latest games or editing videos. The sound system in the 8338 is engineered for clarity and depth, allowing for an enriching audio experience that complements the visual components.

Lastly, the Lenovo 7626 is tailored for businesses, focusing on durability and performance. Its rugged design can withstand various conditions, making it suitable for travel and outdoor use. Along with long battery life, the 7626 includes features like a backlit keyboard and ample connectivity options, ensuring it meets the demands of a busy work environment.

In conclusion, the Lenovo models 7479, 7629, 9961, 8338, and 7626 each offer distinct features and technological advancements, catering to different user preferences. From portability to performance and flexibility, Lenovo continues to lead in innovation, providing devices that enhance productivity and user satisfaction.
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