Lenovo Z575, Z475 manual Computer screen problems, Puter does not work

Page 44

Chapter 5. Troubleshooting

The computer does not return	• If the computer does not return from sleep mode, it may
from sleep mode and the com-	have entered hibernation mode automatically because the
puter does not work.	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:
		- 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.

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Contents IdeaPad Z475/Z575 Regulatory Notice First Edition April Copyright Lenovo Contents Page Top view Getting to know your computer„ Z475 „ Z575 Getting to know your computerCamera Wireless module antennas Computer display Speakers Power button OneKey Rescue system buttonGetting to know your computer Integrated Thermal management buttonLeft-side view Fan louversVGA port RJ-45 portESATA/USB Getting to know your computer Combo port USB portOptical drive „ Z475 „ Z575Right-side view Getting to know your computer RJ-45 port Integrated wireless device switch Memory card slot Front viewBottom view Battery pack „ Connecting to the power „ Configuring the operating systemLearning the basics „ Reading the manualsLearning the basics „ Shutting down your computerPutting your computer into sleep state „ Checking battery status „ Charging the battery„ Removing the battery pack „ Handling the batteryUsing the touchpad Z575 Using the keyboard„ Numeric keypad Z475 „ Function key combinations Learning the basics Removing a memory card Connecting external devicesInserting a memory card „ Connecting USB devices „ Connecting Bluetooth enabled devices on select models Enabling Bluetooth communications on your computerSpecial keys and buttons „ Volume buttons b~d„ OneKey Rescue system button a „ OneKey Theater button e Standard mode Super silent modeEfficient thermal dissipation mode „ Thermal management button fPerforming dust cleaning System status indicators Securing your computer „ Using VeriFace„ Attaching a security lock not supplied „ Using passwords Connecting to the Internet Wired connection„ Hardware connection „ Software configurationConnecting to the Internet Wireless connection Wi-Fi WiMAXSoftware configuration Hardware connectionOneKey Rescue system OneKey Rescue system„ Introduction „ Creating a recovery discs OneKey Rescue systemOneKey Rescue system Troubleshooting Frequently asked questionsWhere can I find warranty information? Troubleshooting Display problemsSleep or hibernation problems Troubleshooting Password problemsKeyboard problems Computer screen problems Puter does not workTroubleshooting Sound problems Battery problemsHard disk drive problem Startup problemTroubleshooting Other problems RespondReplacing the battery pack Appendix A. CRU instructionsAppendix A. CRU instructions Replacing the hard disk drive Handling a hard disk driveZ475 Z575 Pull the tab in the direction shown by arrow d Take out the hard disk drive secured in a metal frame e Appendix A. CRU instructions Replacing memory Appendix A. CRU instructions Appendix A. CRU instructions Removing the optical drive Setup Poster User Guide Trademarks Page New World. New Thinking.TM

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