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Lenovo Z470, Z370, Z570 manual Computer screen problems, Troubleshooting

Models: Z570 Z470 Z370

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• If the computer does not return from sleep mode, it may

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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Lenovo Z470, Z370, Z570 Computer screen problems, Troubleshooting, If the computer does not return from sleep mode, it may

Contents

IdeaPad Z370/Z470/ Z570 User GuideRegulatory Notice First Edition December Copyright LenovoChapter 5. Troubleshooting ContentsChapter 3. Connecting to the Chapter 2. Learning thePage Z370/Z470 Chapter 1. Getting to know your computerTop view „ Z570 Chapter 1. Getting to know your computera Integrated b Wireless module antennas c Computer displayd Speakers e Power button f OneKey Rescue system button camerac Fan louvers „ Z370/Z470Left-side view d VGA porth USB port g eSATA/USBcombo port Chapter 1. Getting to know your computerRight-side view „ Z370„ Z470 c Optical driveChapter 1. Getting to know your computer d USB portf RJ-45 port This port connects the computer to an Ethernet networkc Memory card slot a GPU switch on select models b Integrated wireless device switchFront view Chapter 1. Getting to know your computer„ Z370 Bottom viewChapter 1. Getting to know your computer Chapter 1. Getting to know your computer „ Z470a b c d „ Z570 b Battery packd Battery latch - spring loaded Chapter 1. Getting to know your computerInstalling the battery pack „ Connecting to the power„ Configuring the operating system Connecting the computer to an electrical outletPutting your computer into sleep state „ Putting your computer into sleep state or shutting it down„ Shutting down your computer Chapter 2. Learning the basics„ Charging the battery Using AC adapter and battery„ Checking battery status Chapter 2. Learning the basics„ Handling the battery „ Removing the battery packChapter 2. Learning the basics a Touchpad Using the touchpadChapter 2. Learning the basics Z570 Using the keyboard„ Numeric keypad Z370/Z470 Chapter 2. Learning the basicsb b a „ Function key combinationsChapter 2. Learning the basics Enter sleep mode Turn on/off the backlight of the LCD screen Chapter 2. Learning the basicsInserting a memory card Connecting external devices„ Using memory cards not supplied Removing a memory cardModel „ Connecting USB devicesChapter 2. Learning the basics Number of USB portEnabling Bluetooth communications on your computer „ Connecting Bluetooth enabled devices on select modelsChapter 2. Learning the basics Special keys and buttons „ Volume buttons b~d„ OneKey Rescue system button a b c d e fMusic mode Normal modeMovie mode Picture modeEfficient thermal dissipation mode Standard modeSuper silent mode „ Thermal management button fPerforming dust cleaning Chapter 2. Learning the basicsc Hard disk drive indicator d GPU switch indicator on select models System status indicatorsa Caps lock indicator b Num lock indicator e Touchpad indicatorChapter 2. Learning the basics f Power status indicator g Battery status indicator h Wireless communication indicatorSecuring your computer „ Using VeriFace„ Attaching a security lock not supplied Chapter 2. Learning the basicsEnabling NVIDIA Optimus on select models „ Using passwordsChapter 2. Learning the basics Wired connection Chapter 3. Connecting to the InternetWireless network technology connect without wiring „ Hardware connection „ Software configurationChapter 3. Connecting to the Internet CableChapter 3. Connecting to the Internet Wireless connectionWi-Fi WiMAX Hardware connection „ Using Wi-Fi/WiMAX on select models Enabling wireless connectionSoftware configuration Chapter 3. Connecting to the InternetChapter 4. OneKey Rescue system „ Using Lenovo OneKey Recovery within Windows operating systemFor more instructions, see the Help file of Lenovo OneKey Recovery „ Introduction„ Creating a recovery discs „ Using Lenovo OneKey Rescue system without Windows operating systemChapter 4. OneKey Rescue system The estimated number of discs needed will be displayed before the process of creating the recovery discs begins. To minimize the number of discs needed, use recordable DVDs as the media. Also make sure your optical drive is compatible with the disc intended for use Chapter 4. OneKey Rescue systemChapter 5. Troubleshooting Frequently asked questionsHow can I install the device drivers? Chapter 5. TroubleshootingWhere can I find warranty information? What can I do if the backup process fails?Display problems TroubleshootingChapter 5. Troubleshooting Keyboard problems Chapter 5. Troubleshooting Password problemsSleep or hibernation problems Chapter 5. Troubleshooting Computer screen problemsIf the computer does not return from sleep mode, it may A hard disk drive problem Chapter 5. Troubleshooting Sound problemsBattery problems A startup problemChapter 5. Troubleshooting Other problems Replacing the battery pack Appendix A. CRU instructions4 Install a fully charged battery pack Appendix A. CRU instructionsb c a1 5 Slide the manual battery latch to the locked positionDo not touch the connector Replacing the hard disk driveHandling a hard disk drive Appendix A. CRU instructionsZ370 Appendix A. CRU instructionsAppendix A. CRU instructions c c5 Remove the frame fixing screws c A Reinstall the frame fixing screws Appendix A. CRU instructionsAppendix A. CRU instructions Z470/Z570Z470 Z570 Appendix A. CRU instructionsZ470 Appendix A. CRU instructions d’ d6 Pull the tab in the direction shown by arrow d 7 Take out the hard disk drive secured in a metal frame e Appendix A. CRU instructionsZ570 Z470Appendix A. CRU instructions Z570Replacing memory Appendix A. CRU instructions0 Reinstall and tighten the screws A Reinstall the battery b aaAppendix A. CRU instructions To make sure that the DDR3 SDRAM is installed correctly, do as follows Appendix A. CRU instructionsTo remove the optical drive, do the following Removing the optical driveAppendix A. CRU instructions 2 Remove the screw shown in the illustration aAppendix A. CRU instructions Setup PosterUser Guide Trademarks Page V1.0en-US New World. New Thinking.TMLenovo China