Lenovo S400U, 59RF0035 manual Display panel problems, Work

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Chapter 6. Troubleshooting

The computer does not	• If your computer is in sleep mode, connect the AC
return from sleep mode and	adapter to the computer, then press any key or the
the computer does not	power button.
work.	• 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.

Display panel 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
	F12 (	) 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 persists, follow the solution in the
	next problem “The screen is unreadable or
	distorted.”
	- Press F9 (		) to confirm whether the LCD screen
	has been turned off.

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.

Incorrect characters appear	• Are the operating system or programs installed
on the screen.	correctly? If they are installed and configured
	correctly, have the computer serviced.

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Contents Lenovo IdeaPad S300/S400/S400u/S405 Regulatory Notice Second Edition August Copyright Lenovo Contents Page Getting to know your computer Top viewGetting to know your computer Integrated TouchpadLeft-side view Fan louversRJ-45 port Hdmi portJack Right-side viewUSB 2.0 port Front view Bottom view „ Connecting to the power Learning the basics„ Reading the manuals „ Turning on the computer„ Charging the battery „ Checking battery status„ Removing the battery pack „ Handling the battery Left-click area Using the touchpadRight-click area Hotkeys „ Setting hotkey mode „ Using memory cards not supplied Connecting external devicesInserting a memory card Removing a memory card„ Connecting USB devices „ Connecting Bluetooth enabled devices on select models Enabling Bluetooth communications on your computer„ Novo button a Special keys and buttonsSystem status indicators Power status indicator Battery status indicatorLearning the basics Symbol Indicator Meaning Status „ Using VeriFace Securing your computerStarting to use Windows Configuring the operating system for the first timeStart screen Desktop Starting to use Windows Search charmCharms Settings charm Share charmStart charm Devices charm„ Putting your computer to sleep „ Shutting down the computer Help and support Wired connection Connecting to the Internet„ Hardware connection Cable „ Software configuration Connecting to the InternetWireless connection Wi-Fi WiMAXEnabling wireless connection „ Connecting to wireless LANConnecting to a wireless network „ Backing up the system partition Lenovo OneKey Recovery system„ Restoring Troubleshooting „ Drivers and preinstalled softwareFrequently asked questions „ Finding information„ Bios setup utility „ Lenovo OneKey Recovery systemTroubleshooting When do I need to change the boot mode? „ Getting helpTroubleshooting Display problemsTroubleshooting Bios password problems Sleep problemsDisplay panel problems WorkBattery problems Troubleshooting Sound problemsHard disk drive problem Troubleshooting Other problems RespondTrademarks Page V2.0en-US