Lenovo Flex 10 User Guide - Lenovo Flex 10 - Page 27

Chapter 3. Troubleshooting 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 power adapter to the computer, then press the Windows button or the Power button. • If your computer is in hibernation mode or powered-off, connect the AC power 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 five seconds or more. If the computer still does not reset, remove the AC power adapter. Display panel problems The screen is blank. The screen is unreadable or distorted. Incorrect characters appear on the screen. Sound problems No sound can be heard from the speakers even when the volume is turned up. • Do the following: - If you are using the AC power adapter or the battery, and the battery status indicator is on, press F12 ( ) to make the screen brighter. - If the power indicator is blinking, press the Power button to resume from 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 backlight of the LCD screen has been turned off. • Make sure that: - The screen resolution and color quality are correctly set. - The monitor type is correct. • Are the operating system or programs installed correctly? If they are installed and configured correctly, have the computer serviced. • Make sure that: - The Mute function is off. - The combo audio jack is not being used. - Speakers are selected as the playback device. 23