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Lenovo Y450 manual „Computer screen problems, Troubleshooting, The screen is blank

Models: Y450

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Computer screen problems

Chapter 4. Troubleshooting

If the sleep indicator is on, your computer is in sleep mode. Connect the AC adapter to the computer; then press any key or the power button.

If the sleep indicator is off, your computer is in sleep/hibernation mode or power-off state. Connect the AC adapter to the computer; then press the power button to resume operation.

If the system still does not return from sleep mode, your system has stopped responding, and you cannot turn off the computer; reset the computer. Unsaved data may be lost. To reset the computer, press and hold the power button for 4 seconds or more. If the computer is still not reset, remove the AC adapter and the battery.

Computer screen problems

The screen is blank.

Do the following:

If you are using the AC adapter, or using the battery, and the battery status indicator is on (is blue), press Fn + to make the screen brighter.

If the power indicator is in blinking blue, press any key or the power button to resume from the sleep mode.

If you still have the problem, do the Solution in the following problem “The screen is unreadable or distorted.”

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Lenovo Y450 manual „Computer screen problems, Troubleshooting, The screen is blank

Contents

Lenovo IdeaPad Y450 User GuideFirst Edition November Copyright Lenovo 2009. All rights reservedENERGY STAR model information Windows XP Power plan BalancedAdvanced power settings Windows VistaExplanation of hard disk capacity Page Chapter 3. Using external devices ContentsChapter 2. Using your computer Chapter 1. Getting to know your computerChapter 6. Safety, use, and care information ContentsChapter 4. Troubleshooting Appendix C. SpecificationsAppendix D. Notices ContentsIndex Chapter 1. Getting to know your computer Top viewPower button Wireless LAN antennasSystem status indicators Chapter 1. Getting to know your computerLeft-sideview Chapter 1. Getting to know your computerFan louvers Chapter 1. Getting to know your computerSecurity keyhole overheating of the computer may occurRight-sideview Chapter 1. Getting to know your computerChapter 1. Getting to know your computer AC power adapter jackIEEE 1394 connector eSATA portFront view Chapter 1. Getting to know your computerChapter 1. Getting to know your computer System status indicatorsIntegrated wireless device switch Microphone jack externalBottom view Chapter 1. Getting to know your computerBattery pack Battery latch - spring loadedBattery latch - manual Chapter 1. Getting to know your computerUsing the touchpad Chapter 2. Using your computerY450 ChiralMotion Chapter 2. Using your computer„Gestures PinchChapter 2. Using your computer „Palm CheckChapter 2. Using your computer Using the keyboard„Numeric keypad Chapter 2. Using your computer „Function key combinationsFn + PrtSc/SysRq System request Chapter 2. Using your computerIncrease/decrease computer volume Fn +Special keys and buttons Chapter 2. Using your computer„Touch inductive panel with multi-mediabuttons Mute/unmute the sound Decrease computer volume Chapter 2. Using your computerOpen Dolby function setup screen Increase computer volume„OneKey Rescue System button Using the optical driveChapter 2. Using your computer For details, see OneKey Rescue System User GuideUsing memory cards Chapter 2. Using your computer„Inserting a memory card Chapter 2. Using your computer„Removing a memory card Using the integrated camera Using Lenovo remote specific models onlyChapter 2. Using your computer „Using RJ-45port Using the InternetChapter 2. Using your computer „Using wireless LAN Chapter 2. Using your computerSecuring your computer Chapter 2. Using your computer„Attaching a security lock optional „Using passwords „Using VeriFaceChapter 2. Using your computer „Checking battery status Installing device driversUsing battery and AC adapter Chapter 2. Using your computer„Using the AC adapter Chapter 2. Using your computer„Charging the battery Chapter 2. Using your computerDanger „Handling the batteryChapter 2. Using your computer DangerChapter 3. Using external devices Connecting a Universal Serial Bus USB deviceChapter 3. Using external devices Connecting an eSATA device Chapter 3. Using external devicesConnecting an IEEE 1394 device Chapter 3. Using external devicesConnecting an ExpressCard/34 device Chapter 3. Using external devices„Inserting an ExpressCard device Chapter 3. Using external devices„Removing an ExpressCard device „Connecting a VGA monitor Connecting an external displayChapter 3. Using external devices „Connecting an HDMI monitor Chapter 3. Using external devicesConnecting a headphone and audio device Chapter 3. Using external devicesChapter 3. Using external devices Listening to music at high volume over extended periods of time may damage your hearingConnecting an external microphone Chapter 3. Using external devices„Enabling Bluetooth communications Chapter 3. Using external devicesChapter 4. Troubleshooting Frequently asked questionsWhere can I find warranty information? Chapter 4. TroubleshootingWhere are the recovery discs? How can I contact the Customer Support Center?„Display problems TroubleshootingChapter 4. Troubleshooting Chapter 4. Troubleshooting My screen goes blank while the computer is onChapter 4. Troubleshooting „A password problem„Keyboard problems I forgot my passwordChapter 4. Troubleshooting „Sleep or hibernation problemsThe computer enters sleep mode unexpectedly Chapter 4. Troubleshooting „Computer screen problemsThe screen is blank The screen is unreadable or distorted Chapter 4. TroubleshootingIncorrect characters appear on the screen „Battery problems „Sound problemsChapter 4. Troubleshooting Chapter 4. Troubleshooting „A hard disk drive problem„A startup problem The battery does not chargeChapter 4. Troubleshooting „Other problemsYour computer does not respond Chapter 5. Getting help and service Getting help and serviceChapter 5. Getting help and service Calling the Customer Support CenterGetting help on the Web Chapter 5. Getting help and service The following items are not coveredChapter 5. Getting help and service ƒMachine Type and ModelChapter 5. Getting help and service Getting help around the worldChapter 6. Safety, use, and care information Important safety informationChapter 6. Safety, use, and care information „Conditions that require immediate action„Safety guidelines Chapter 6. Safety, use, and care informationChapter 6. Safety, use, and care information „Service and upgradesDanger Chapter 6. Safety, use, and care information „Power cords and power adaptersDanger Chapter 6. Safety, use, and care information terminals and/or the connector terminals on a power adapter, which can eventually result in overheating„Plugs and outlets Chapter 6. Safety, use, and care information„Extension cords and related devices DangerChapter 6. Safety, use, and care information „Power supply statementDanger Chapter 6. Safety, use, and care information „Lithium coin cell battery noticeDanger „Heat and product ventilation Chapter 6. Safety, use, and care informationDanger Chapter 6. Safety, use, and care information ƒDo not restrict or block any ventilation openingsChapter 6. Safety, use, and care information „CD and DVD drive safetyDanger Chapter 6. Safety, use, and care information „Electrical current safety informationDanger Chapter 6. Safety, use, and care information To connect 1.Turn everything OFFChapter 6. Safety, use, and care information „Laser compliance statementDanger Chapter 6. Safety, use, and care informationWhen a CD or DVD drive is installed, note the following handling instructions DangerChapter 6. Safety, use, and care information „Liquid Crystal Display LCD noticeChapter 6. Safety, use, and care information „Be careful about where and how you workCaring your computer Chapter 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 shockChapter 6. Safety, use, and care information Prevent others from touching components„Carry your computer properly Chapter 6. Safety, use, and care information„Be gentle with your computer „For outdoor useChapter 6. Safety, use, and care information „Data safety„Handle storage media and drives properly Chapter 6. Safety, use, and care information „Take care in setting passwords„Other important tips „Cleaning the cover of your computer Chapter 6. Safety, use, and care information„Cleaning your computer keyboard Chapter 6. Safety, use, and care information„Cleaning your computer display Accessibility and comfortChapter 6. Safety, use, and care information Chapter 6. Safety, use, and care information „Ergonomic informationChapter 6. Safety, use, and care information General 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„What if you are traveling? MaintenanceChapter 6. Safety, use, and care information „Questions about vision?„General tips for maintenance Chapter 6. Safety, use, and care informationChapter 6. Safety, use, and care information ƒBoot into the BIOS and load the default settingsChapter 6. Safety, use, and care information hardware 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 itAppendix A. Lenovo limited warranty „What this warranty covers„How to obtain warranty service Appendix A. Lenovo limited warrantyAppendix A. Lenovo limited warranty „Replacement of a product or part“Warranty Information.” „Your additional responsibilities Appendix A. Lenovo limited warranty„Use of personal information „What this warranty does not cover Appendix A. Lenovo limited warrantyAppendix A. Lenovo limited warranty „Limitation of liability„Dispute resolution Appendix A. Lenovo limited warranty„Other rights Appendix A. Lenovo limited warranty„European Economic Area EEA Appendix A. Lenovo limited warranty „Suplemento de Garantía para MéxicoMarketed by Appendix A. Lenovo limited warrantyManufactured by China Shanghai, China CP TelWarranty Information Appendix A. Lenovo limited warrantyAppendix A. Lenovo limited warranty „Types of warranty service1 Customer Replaceable Unit “CRU” service 3Courier or depot service Appendix A. Lenovo limited warranty2On-siteservice 4Customer carry-inor mail-inserviceAppendix A. Lenovo limited warranty 5Product exchange serviceAppendix A. Lenovo limited warranty Lenovo warranty service telephone numbersWarranty service telephone numbers Appendix A. Lenovo limited warranty South AfricaAppendix B. Customer Replaceable Units CRUs Environment ƒ Temperature Appendix C. SpecificationsSpecifications SizeAppendix C. Specifications Battery pack1009 Think Place - Building One Morrisville, NC Appendix D. NoticesLenovo United States, Inc U.S.A Attention Lenovo Director of LicensingAppendix D. Notices „Television output notice „Export classification noticeAppendix D. Notices „Wireless interoperability Wireless related informationAppendix D. Notices ƒHeadset ƒPrinter Appendix D. NoticesƒFile Transfer ƒSynchronization ƒAudio Gateway ƒHuman Interface Devices Keyboard/Mouse„Usage environment and your health Appendix D. Notices„Federal Communications Commission FCC statement Electronic emissions noticesAppendix D. Notices Responsible party „German Class B compliance statement Appendix D. NoticesAppendix D. Notices Informationen in Hinsicht EMVG Paragraf 4 Abs. 1Appendix D. Notices „Korea Class B „Japanese VCCI Class B statementAppendix D. Notices „General recycling statement WEEE and recycling statementsAppendix D. Notices EU WEEE statements Appendix D. NoticesJapan recycling statements Appendix D. Notices„Disposing of a Lenovo computer components Appendix D. NoticesNotice for users in the U.S.A Notice on deleting data from your hard diskAppendix D. Notices ƒUsing the preinstalled recovery program, bring the hard disk back to factory-shipstate Appendix D. NoticesAppendix D. Notices TrademarksIndex Page Index LENOVO If your product is not working correctlyDO NOT RETURN IT TO THE STORE New World. New Thinking.TM Lenovo China P/N