Lenovo G555, G455 manual Troubleshooting Sleep or hibernation problems, Computer screen problems

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Chapter 5. Troubleshooting

Sleep or hibernation problems

The computer enters sleep mode

• If the processor overheats, the computer automatically enters sleep

unexpectedly.

mode to allow the computer to cool and to protect the processor and

 

other internal components. Check the settings for sleep mode.

The computer enters sleep mode

• Make sure that:

immediately after Power-on self-test

- The battery is charged.

(POST).

- The operating temperature is within the acceptable range. See

 

“Appendix B. Use and care information” on page 39.

Note: If the battery is charged and the temperature is within range, have the computer serviced.

The critical low-battery error

• The battery power is getting low. Connect the AC adapter to the

message appears, and the

computer, or replace the battery with a fully charged one.

computer immediately turns off.

 

The computer does not return from sleep mode and the computer does not work.

•If the computer does not return from sleep mode, it may have entered hibernation mode automatically because the battery is depleted. Check the power indicator.

•If your computer is in sleep mode connect the AC adapter to the computer, then press any key or the power button.

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

Note: 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:

The screen is unreadable or distorted.

Incorrect characters appear on the screen.

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

-or-

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

-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 in blinking, press the power button to resume from the sleep mode.

-If the problem persist, follow the solution in the following problem “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.

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

•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 resolution over the optimum, reduce the display resolution and the color depth.

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Contents Lenovo G455/G555 First Edition January Copyright Lenovo Respective Users Explanation of hard disk capacity Dear userContents Unpack Important safety information„ Read this first Working placeImportant safety information On usingService and upgrades Getting to know your computer „ Lenovo G555„ Lenovo G455 Getting to know your computerModels only Computer display Power buttonSpecific models only TouchpadRJ-45 port Kensington slotFan louvers VGA portRight-side view Optical driveSpeakers „ Lenovo G555 „ Lenovo G455Microphone jack Headphone jack Bottom view Battery latch manual Battery pack Memory/Wireless Learning the basics „ Connect to the power„ Configure the operating system „ Read the manualsLearning the basics „ Shutting down your computerPutting your computer into sleep state „ Charging the battery Using AC adapter and battery„ Checking battery status „ Removing the battery pack„ Handling the battery Left click buttonG455 „ Numeric keypadG555 „ Function key combinations „ OneKey Rescue System button OneKey Rescue System button aSystem status indicators „ Attaching a security lock not supplied „ Using VeriFace„ Using passwords UtilityInserting a memory card „ Using memory cards not supplied„ Connecting a universal serial bus USB device Removing a memory cardPairing with a Bluetooth enabled device Enabling Bluetooth communicationsTo send files from the computer to the paired device Wireless network technology connect without wiring Using the computer network„ Software configuration „ Hardware connectionEnabling wireless connection „ Using Wi-Fi/WiMax specific models onlyUsing the computer network Hardware connection Wi-Fi/WiMax networkOneKey Rescue System OneKey Rescue System„ Introduction Troubleshooting Frequently asked questionsWhat can I do if the backup process fails? TroubleshootingWhen do I need to restore the system to the factory status? Password problem Display problemsKeyboard problems Troubleshooting Sleep or hibernation problems Computer screen problemsHard disk drive problem Troubleshooting Sound problemsBattery problems Startup problemTroubleshooting Other problems Your computer does not respond„ To replace the battery Upgrading and replacing devicesUpgrading and replacing devices Handling a hard disk driveUpgrading and replacing devices 111 Upgrading and replacing devices Removing the optical drive Upgrading and replacing devices Appendix A. Getting help and service Getting help on the WebAppendix A. Getting help and service Getting help around the worldWarranty Service Telephone Numbers Appendix B. Use and care information „ Be careful about where and how you work„ Notice of static-electricity „ For outdoor use „ Be gentle with your computer„ Carry your computer properly „ Handle storage media and drives properly„ Take care in setting passwords „ Data safety„ Other important tips „ What if you are traveling? Accessibility and comfort„ Ergonomic information „ Questions about vision?„ General tips for maintenance „ Cleaning your computer keyboard „ Cleaning the cover of your computer„ Cleaning your computer display „ How to obtain warranty service Appendix C. Lenovo limited warranty„ What this warranty covers „ What your service provider will do to correct problems„ Your additional responsibilities „ Replacement of a product or partAppendix C. Lenovo limited warranty Information„ Use of personal information „ What this warranty does not cover„ Limitation of liability „ Other rights „ Dispute resolution„ European Economic Area EEA „ Lenovo Turkey address Lenovo Technology B.V. Turkiye Istanbul SubesiCourier or Depot Service „ Types of warranty serviceCustomer Replaceable Unit CRU Service On-site Service Customer Carry-In or Mail-In ServiceAppendix C. Lenovo limited warranty Product Exchange Service Appendix D. Customer replaceable units CRUs Appendix E. Notices „ Export classification notice Appendix E. NoticesWindows Windows XPWindows Vista Wireless related information „ Wireless interoperability„ Safety information related to Mobile Broadband „ Usage environment and your healthElectronic emissions notices „ Federal Communications Commission FCC Statement„ Avis de conformité à la réglementation d’Industrie Canada „ Industry Canada Class B Emission Compliance Statement„ German Class B Compliance Statement „ European Union Compliance Statement Class B Compliance Weee and recycling statements „ Japan Compliance Statement for Power line Harmonics„ Korea Class B „ General recycling statementEU Weee statements „ Disposing of a Lenovo Computer ComponentsAppendix E. Notices Lenovo regulatory notice Factory preinstalled Wireless LAN/WiMAX moduleAppendix F. Lenovo regulatory notice „ Read first regulatory informationII. Preinstalled integrated Bluetooth module Appendix F. Lenovo regulatory notice„ Canada Industry Canada IC Factory preinstalled Wireless LAN modulesII Preinstalled integrated Bluetooth module IC Certification numberIV Exposure of humans to RF fields RSS-102 Modules de réseaux local sans fil pré-installé à l’usineII Module Bluetooth intégré préinstallé Numéro d’homologation IC„ Electronic emission notices Federal Communications Commission FCC StatementTested To Comply With FCC Standards „ Europe EU Declaration of ConformityAppendix F. Lenovo regulatory notice Appendix F. Lenovo regulatory notice For model BCM94313HMG2L For model AR5B95 For model BCM943225HM For model BCM92046MDGEN Declaration of Conformity Restriction de bande de fréquence de l’Union Européenne EU Frequency band restriction Περιορισμός ζώνης συχνοτήτων ΕΕ Begränsning för EU-frekvensband Takmarkanir ESB á tíðnisviði Restrizzjoni fuq il-faxxa tal-frekwenza ta’ l-UE „ Notice for users in Ukraine „ Notice for users in Pakistan„ Notice for users in Morocco „ Notice for users in in Croatia For model BCM943225HMFor model BCM94313HMG2L For model AR5B93 For model AR5B95 For model BCM92046MDGEN „ Notice for users in Brazil BCM94313HMG2L„ Notice for users in Saudi Arabia For model AR5B95 For model AR5B93 For model BCM943225HM For model BCM92046MDGEN „ Notice for users in UAE „ Notice for users in India „ Notice for users in Indonesia„ Notice for users in Malaysia „ Notice for users in the Philippines„ Notice for users in Singapore For model BCM94313HMG2L For model AR5B95„ Notice for users in Thailand „ Notice for users in Taiwan100 BCM94313HMG2L, AR5B95, AR5B93, BCM943225HM, BCM92046MDGEN „ Notice for users in South Africa Appendix G. Features and specifications Trademarks Index 105106 Do not Return IT to the Store New World. New Thinking.TM
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