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Lenovo U350 manual Troubleshooting Computer screen problems, Sound problems

Models: U350

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Page 59

Chapter 5. Troubleshooting

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, press
		Fn + to make the screen brighter.
		- If the power indicator is blinking, press the power
		button to resume from the sleep mode.
		- If the problem persists, follow the solution in the
		following problem “The screen is unreadable or
		distorted.”
The screen is unreadable or	•	Make sure that:
distorted.		- The display device driver is installed correctly.
		- The screen resolution and color quality are
		correctly set.
		- The monitor type is correct.
Incorrect characters appear	• Did you install the operating system or application
on the screen.		program correctly? If they are installed and
		configured correctly, have the computer serviced.

Sound problems

No sound can be heard	•	Make sure that:
from the speaker even		- The Mute function is off.
when the volume is turned		- The headphone jack is not used.
		- The headphone jack is not used.

up.	- Speakers is selected as a playback device.

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Lenovo U350 manual Troubleshooting Computer screen problems, Sound problems

Contents

Lenovo IdeaPad U350 First Edition May Copyright Lenovo 2009. All rights reserved Respective Users Explanation of hard disk capacity Page Page Contents 117 Contents Appendix B. Use and careAppendix F. Features Appendix C. Lenovo limitedIii Important safety informationImportant safety information „ Read this firstImportant safety information Unpack Important safety information Working place Important safety information On using Vii Important safety informationViii Important safety information Service and upgradesGetting to know your computer Mute button Ambient Light Sensor Power buttonGetting to know your computer Touchpad Wireless module antennas Computer displayLeft-side view Right-side view Bottom view Getting to know your computer Speakers Battery pack„ Read the manuals „ Connect to the powerInstall the battery pack Learning the basicsPutting your computer into sleep state „ Configure the operating system„ Turn on the computer Learning the basics„ Shutting down your computer „ Charging the battery Using AC adapter and battery„ Checking battery status „ Removing the battery pack „ Handling the battery Right click button Using the touchpadLeft click button „ Numeric keypad Using the keyboard„ Function key combinations Fn + F3 Fn + EscFn + F1 Fn + F2Special keys and buttons Mute button Learning the basics OneKey Rescue System buttonTouchpad indicator System status indicators„ Attaching a security lock not supplied Securing your computer„ Using passwords „ Using VeriFace„ Using memory cards not supplied Connecting external devices„ Removing a memory card „ Inserting a memory cardEnabling Bluetooth communications „ Connecting a universal serial bus USB device„ Connecting a Bluetooth device specific models only Page Wired connection Using the InternetCable „ Software configurationUsing the Internet „ Hardware connectionWi-Fi Wireless connectionHardware connection „ Using Wi-Fi/WiMax specific models onlyEnabling wireless connection Software configuration„ Using Mobile Broadband specific models only Inserting the SIM card Removing the SIM card Using the Internet „ Introduction OneKey Rescue SystemOneKey Rescue System OneKey Rescue System „ Using Lenovo OneKey Recovery in WindowsOneKey Rescue System Frequently Asked Questions TroubleshootingWhere are the recovery discs? TroubleshootingWhat can I do if the backup process fails? Display problems TroubleshootingComputer is on Password problemSleep or hibernation problems Troubleshooting Keyboard problemsComputer does not return from sleep mode and does not work Sound problems Troubleshooting Computer screen problemsStartup problem Troubleshooting Battery problemsHard disk drive problem Made Troubleshooting OneKey Rescue System problemsRespond Troubleshooting Other problemsUpgrading and replacing devices Replacing the batteryUpgrading and replacing devices Handling a hard disk drive Replacing the hard disk driveUpgrading and replacing devices Upgrading and replacing devices Upgrading and replacing devices Replacing memory Upgrading and replacing devices Upgrading and replacing devices Upgrading and replacing devices Appendix A. Getting help and service Getting help on the Web Appendix A. Getting help and serviceAppendix A. Getting help and service Appendix A. Getting help and service Getting help around the world Caring your computer „ Be careful about where and how you workAppendix B. Use and care information Appendix B. Use and care information „ Notice of static-electricity„ Carry your computer properly „ Be gentle with your computer„ Handle storage media and drives properly „ For outdoor use„ Other important tips „ Data safety„ Take care in setting passwords Appendix B. Use and care information „ Ergonomic information Accessibility and comfort„ Questions about vision? „ What if you are traveling?„ General tips for maintenance MaintenanceAppendix B. Use and care information „ Cleaning the cover of your computer „ Cleaning your computer keyboard „ Cleaning your computer display „ What this warranty covers Appendix C. Lenovo limited warrantyAppendix C. Lenovo limited warranty „ How to obtain warranty service„ What your service provider will do to correct problems Information „ Replacement of a product or part „ Use of personal information „ Your additional responsibilities„ What this warranty does not cover „ Limitation of liability „ Dispute resolution „ European Economic Area EEA „ Other rightsLenovo Technology B.V. Turkiye Istanbul Subesi „ Lenovo Turkey addressWarranty information Customer Replaceable Unit CRU Service „ Types of warranty serviceCustomer Carry-In or Mail-In Service Appendix C. Lenovo limited warranty On-site ServiceCourier or Depot Service Product Exchange Service SMS Warranty Service Telephone NumbersToll Free Number Outside of Sao Paulo Region Appendix D. Customer replaceable units CRUs Appendix D. Customer replaceable units CRUs Appendix E. Notices Appendix E. Notices „ Export classification notice Energy Star model information Windows Vista Windows XP100 „ Wireless interoperability101 „ Usage environment and your health102 „ Safety information related to Mobile Broadband103 104 Electronic emissions notices„ Federal Communications Commission FCC Statement 105 „ Industry Canada Class B Emission Compliance Statement106 „ Avis de conformité à la réglementation d’Industrie Canada„ German Class B Compliance Statement 107 108 „ European Union Compliance Statement Class B Compliance109 110 „ Japan Compliance Statement for Power line Harmonics„ Korea Class B 111 Weee and recycling statements„ General recycling statement 112 EU Weee statements113 Japan recycling statements114 „ Disposing of a Lenovo Computer Components115 116 Form Factor Appendix F. Features and Specifications117 Model Name IdeaPad U350118 Appendix F. Features and Specifications Ports119 Trademarks120 IndexIndex 121122 If your product is not working correctly Do not Return IT to the StoreNew World. New Thinking.TM