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Lenovo Y450 manual Troubleshooting, The screen is unreadable or distorted

Models: Y450

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Chapter 4. Troubleshooting

The screen is unreadable or distorted.

Make sure that:

The display device driver is installed correctly.

The screen resolution and color quality are correctly set.

The monitor type is correct.

Incorrect characters appear on the screen.

Did you install the operating system or application program correctly? If they are installed and configured correctly, have the computer serviced.

A message, “Unable to create overlay window,” appears when you try to start DVD playback.

-or-

You get poor or no playback while running video playback, DVD playback, or game applications.

Do either of the following:

If you are using 32-bit color mode, change the color depth to 16-bit mode.

If you are using a desktop size of 1366×768 or larger, reduce the desktop size and the color depth.

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Lenovo Y450 manual Troubleshooting, The screen is unreadable or distorted, Incorrect characters appear on the screen

Contents

User Guide Lenovo IdeaPad Y450Copyright Lenovo 2009. All rights reserved First Edition NovemberENERGY STAR model information Windows Vista Power plan BalancedAdvanced power settings Windows XPExplanation of hard disk capacity Page Chapter 1. Getting to know your computer ContentsChapter 2. Using your computer Chapter 3. Using external devicesAppendix C. Specifications ContentsChapter 4. Troubleshooting Chapter 6. Safety, use, and care informationIndex ContentsAppendix D. Notices Top view Chapter 1. Getting to know your computerChapter 1. Getting to know your computer Wireless LAN antennasSystem status indicators Power buttonChapter 1. Getting to know your computer Left-sideviewoverheating of the computer may occur Chapter 1. Getting to know your computerSecurity keyhole Fan louversChapter 1. Getting to know your computer Right-sidevieweSATA port AC power adapter jackIEEE 1394 connector Chapter 1. Getting to know your computerChapter 1. Getting to know your computer Front viewMicrophone jack external System status indicatorsIntegrated wireless device switch Chapter 1. Getting to know your computerChapter 1. Getting to know your computer Bottom viewChapter 1. Getting to know your computer Battery latch - spring loadedBattery latch - manual Battery packY450 Chapter 2. Using your computerUsing the touchpad Pinch Chapter 2. Using your computer„Gestures ChiralMotion„Palm Check Chapter 2. Using your computer„Numeric keypad Using the keyboardChapter 2. Using your computer „Function key combinations Chapter 2. Using your computerFn + Chapter 2. Using your computerIncrease/decrease computer volume Fn + PrtSc/SysRq System request„Touch inductive panel with multi-mediabuttons Chapter 2. Using your computerSpecial keys and buttons Increase computer volume Chapter 2. Using your computerOpen Dolby function setup screen Mute/unmute the sound Decrease computer volumeFor details, see OneKey Rescue System User Guide Using the optical driveChapter 2. Using your computer „OneKey Rescue System buttonChapter 2. Using your computer Using memory cards„Removing a memory card Chapter 2. Using your computer„Inserting a memory card Chapter 2. Using your computer Using Lenovo remote specific models onlyUsing the integrated camera Chapter 2. Using your computer Using the Internet„Using RJ-45port Chapter 2. Using your computer „Using wireless LAN„Attaching a security lock optional Chapter 2. Using your computerSecuring your computer Chapter 2. Using your computer „Using VeriFace„Using passwords Chapter 2. Using your computer Installing device driversUsing battery and AC adapter „Checking battery statusChapter 2. Using your computer „Using the AC adapterChapter 2. Using your computer „Charging the batteryDanger „Handling the batteryChapter 2. Using your computer DangerConnecting a Universal Serial Bus USB device Chapter 3. Using external devicesChapter 3. Using external devices Chapter 3. Using external devices Connecting an eSATA deviceChapter 3. Using external devices Connecting an IEEE 1394 deviceChapter 3. Using external devices Connecting an ExpressCard/34 device„Removing an ExpressCard device Chapter 3. Using external devices„Inserting an ExpressCard device Chapter 3. Using external devices Connecting an external display„Connecting a VGA monitor Chapter 3. Using external devices „Connecting an HDMI monitorChapter 3. Using external devices Connecting a headphone and audio deviceListening to music at high volume over extended periods of time may damage your hearing Chapter 3. Using external devicesChapter 3. Using external devices Connecting an external microphoneChapter 3. Using external devices „Enabling Bluetooth communicationsFrequently asked questions Chapter 4. TroubleshootingHow can I contact the Customer Support Center? Chapter 4. TroubleshootingWhere are the recovery discs? Where can I find warranty information?Chapter 4. Troubleshooting Troubleshooting„Display problems My screen goes blank while the computer is on Chapter 4. TroubleshootingI forgot my password „A password problem„Keyboard problems Chapter 4. TroubleshootingThe computer enters sleep mode unexpectedly „Sleep or hibernation problemsChapter 4. Troubleshooting The screen is blank „Computer screen problemsChapter 4. Troubleshooting Incorrect characters appear on the screen Chapter 4. TroubleshootingThe screen is unreadable or distorted Chapter 4. Troubleshooting „Sound problems„Battery problems The battery does not charge „A hard disk drive problem„A startup problem Chapter 4. TroubleshootingYour computer does not respond „Other problemsChapter 4. Troubleshooting Getting help and service Chapter 5. Getting help and serviceGetting help on the Web Calling the Customer Support CenterChapter 5. Getting help and service The following items are not covered Chapter 5. Getting help and serviceƒMachine Type and Model Chapter 5. Getting help and serviceGetting help around the world Chapter 5. Getting help and serviceImportant safety information Chapter 6. Safety, use, and care information„Conditions that require immediate action Chapter 6. Safety, use, and care informationChapter 6. Safety, use, and care information „Safety guidelinesDanger „Service and upgradesChapter 6. Safety, use, and care information Danger „Power cords and power adaptersChapter 6. Safety, use, and care information terminals and/or the connector terminals on a power adapter, which can eventually result in overheating Chapter 6. Safety, use, and care informationDanger Chapter 6. Safety, use, and care information„Extension cords and related devices „Plugs and outletsDanger „Power supply statementChapter 6. Safety, use, and care information Danger „Lithium coin cell battery noticeChapter 6. Safety, use, and care information Danger Chapter 6. Safety, use, and care information„Heat and product ventilation ƒDo not restrict or block any ventilation openings Chapter 6. Safety, use, and care informationDanger „CD and DVD drive safetyChapter 6. Safety, use, and care information Danger „Electrical current safety informationChapter 6. Safety, use, and care information To connect 1.Turn everything OFF Chapter 6. Safety, use, and care information„Laser compliance statement Chapter 6. Safety, use, and care informationDanger Chapter 6. Safety, use, and care informationWhen a CD or DVD drive is installed, note the following handling instructions Danger„Liquid Crystal Display LCD notice Chapter 6. Safety, use, and care informationCaring your computer „Be careful about where and how you workChapter 6. Safety, use, and care information ƒPlace liquids away from your computer to avoid spills, and keep your computer away from water to avoid the danger of electrical shock Chapter 6. Safety, use, and care informationPrevent others from touching components Chapter 6. Safety, use, and care information„For outdoor use Chapter 6. Safety, use, and care information„Be gentle with your computer „Carry your computer properly„Handle storage media and drives properly „Data safetyChapter 6. Safety, use, and care information „Other important tips „Take care in setting passwordsChapter 6. Safety, use, and care information Chapter 6. Safety, use, and care information „Cleaning the cover of your computerChapter 6. Safety, use, and care information „Cleaning your computer keyboardChapter 6. Safety, use, and care information Accessibility and comfort„Cleaning your computer display „Ergonomic information Chapter 6. Safety, use, and care informationGeneral Posture Below are some general recommendations for assuming a healthy working posture. It is best to periodically make minor modifications in your working posture to deter the onset of discomfort caused by long periods of working in the same position. Frequent, short breaks from your work will also help to prevent any minor discomfort associated with your working posture Chapter 6. Safety, use, and care information„Questions about vision? MaintenanceChapter 6. Safety, use, and care information „What if you are traveling?Chapter 6. Safety, use, and care information „General tips for maintenanceƒBoot into the BIOS and load the default settings Chapter 6. Safety, use, and care informationhardware component on your computer has its own specific driver. If you add a new component, the operating system needs to be instructed on how to operate that piece of hardware. After you install the driver, the operating system can recognize the hardware component and understand how to use it Chapter 6. Safety, use, and care information„What this warranty covers Appendix A. Lenovo limited warrantyAppendix A. Lenovo limited warranty „How to obtain warranty service“Warranty Information.” „Replacement of a product or partAppendix A. Lenovo limited warranty „Use of personal information Appendix A. Lenovo limited warranty„Your additional responsibilities Appendix A. Lenovo limited warranty „What this warranty does not cover„Limitation of liability Appendix A. Lenovo limited warrantyAppendix A. Lenovo limited warranty „Dispute resolution„European Economic Area EEA Appendix A. Lenovo limited warranty„Other rights „Suplemento de Garantía para México Appendix A. Lenovo limited warrantyCP Tel Appendix A. Lenovo limited warrantyManufactured by China Shanghai, China Marketed byAppendix A. Lenovo limited warranty Warranty Information1 Customer Replaceable Unit “CRU” service „Types of warranty serviceAppendix A. Lenovo limited warranty 4Customer carry-inor mail-inservice Appendix A. Lenovo limited warranty2On-siteservice 3Courier or depot service5Product exchange service Appendix A. Lenovo limited warrantyWarranty service telephone numbers Lenovo warranty service telephone numbersAppendix A. Lenovo limited warranty South Africa Appendix A. Lenovo limited warrantyAppendix B. Customer Replaceable Units CRUs Size Appendix C. SpecificationsSpecifications Environment ƒ TemperatureBattery pack Appendix C. SpecificationsU.S.A Attention Lenovo Director of Licensing Appendix D. NoticesLenovo United States, Inc 1009 Think Place - Building One Morrisville, NCAppendix D. Notices Appendix D. Notices „Export classification notice„Television output notice Appendix D. Notices Wireless related information„Wireless interoperability ƒHuman Interface Devices Keyboard/Mouse Appendix D. NoticesƒFile Transfer ƒSynchronization ƒAudio Gateway ƒHeadset ƒPrinterAppendix D. Notices „Usage environment and your healthAppendix D. Notices Electronic emissions notices„Federal Communications Commission FCC statement Responsible party Appendix D. Notices „German Class B compliance statementInformationen in Hinsicht EMVG Paragraf 4 Abs. 1 Appendix D. NoticesAppendix D. Notices Appendix D. Notices „Japanese VCCI Class B statement„Korea Class B Appendix D. Notices WEEE and recycling statements„General recycling statement Appendix D. Notices EU WEEE statementsAppendix D. Notices Japan recycling statementsAppendix D. Notices „Disposing of a Lenovo computer componentsAppendix D. Notices Notice on deleting data from your hard diskNotice for users in the U.S.A Appendix D. Notices ƒUsing the preinstalled recovery program, bring the hard disk back to factory-shipstateTrademarks Appendix D. NoticesIndex Page Index DO NOT RETURN IT TO THE STORE If your product is not working correctlyLENOVO Lenovo China P/N New World. New Thinking.TM