Lenovo G770 manual Troubleshooting Computer screen problems, Sound problems, Battery problems

Page 37

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 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.”
		- Press Fn + F2 to confirm whether the LCD screen has been
		turned off.
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 on	•	Did you install the operating system or programs correctly?
the screen.		If they are installed and configured correctly, have the
		computer serviced.

Sound problems

No sound can be heard from	•	Make sure that:
the speaker even when the vol-		- The Mute function is off.
ume is turned up.		- The headphone jack is not used.
		- Speakers are selected as the playback device.

Battery problems

Your computer shuts down	•	Discharge and recharge the battery.
before the battery status indica-
tor shows empty.
-or-
Your computer operates after
the battery status indicator
shows empty.
The computer does not operate	•	The surge protector in the battery might be active. Turn off
with a fully charged battery.		the computer for one minute to reset the protector; then turn
		on the computer again.

A hard disk drive problem

The hard disk drive does not	•	In the Boot menu in BIOS setup utility, make sure that the
work.		hard disk drive is included in the Boot Device Priority
		correctly.

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Contents Lenovo G770 Regulatory Notice First Edition March Copyright Lenovo Contents Page Top view Getting to know your computerBuilt-in microphone Touchpad Getting to know your computer IntegratedLeft-side view Optical drive Right-side viewFront view Bottom view „ Configuring the operating system „ Conncting to the powerLearning the basics „ Reading the manuals„ Shutting down your computer „ Putting your computer into sleep state or shutting it down„ Charging the battery „ Checking battery status„ Handling the battery „ Removing the battery packUsing the touchpad „ Numeric keypad Using the keyboard„ Function key combinations Learning the basics „ Using memory cards not supplied Connecting external devices„ Connecting USB devices Enabling Bluetooth communications on your computer „ Connecting Bluetooth enabled device on select modelsSpecial keys and buttons „ OneKey Rescue system button aSystem status indicators „ Attaching a security lock not supplied „ Using VeriFaceSecuring your computer On select models „ Using passwordsSwitching between Mode 1 and Mode Wired connection Connecting to the InternetConnecting to the Internet „ Software configuration„ Hardware connection Wi-Fi WiMAX Wireless connectionHardware connection „ Introduction OneKey Rescue systemOneKey Rescue system OneKey Rescue system „ Creating a recovery discsOneKey Rescue system Frequently asked questions Troubleshooting Where can I find warranty information? Display problems TroubleshootingSleep or hibernation problems Troubleshooting Password problemsSound problems Troubleshooting Computer screen problemsBattery problems Hard disk drive problemOneKey Rescue system problems Troubleshooting Startup problemOther problems Appendix A. CRU instructions Replacing the battery packHandling a hard disk drive Appendix A. CRU instructionsAppendix A. CRU instructions Appendix A. CRU instructions Appendix A. CRU instructions Replacing memory Appendix A. CRU instructions Appendix A. CRU instructions Removing the optical drive Appendix A. CRU instructions Trademarks Page New World. New Thinking.TM

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