User manual LENOVO K450-57317803

[. . . ] Machine type: 10086/3109/4743 10089/1168/4744 10090/2556/4748 10121/90A1 10120/90A0 [K430] [K410] [K415] [K450 ES] [K450 Non-ES] IdeaCentre K4 Series User Guide Version 1. 0 2013. 09 31505616 Important Safety Information Before using this manual, it is important that you read and understand all of the related safety information for this product. Refer to the Safety and Warranty Guide that you received with this product for the latest safety information. Reading and understanding this safety information reduces the risk of personal injury or product damage. The interface and functions shown in this User Guide are provided for reference only and may differ from actual product appearance. [. . . ] Ensure that the volume is turned up and the sound is not muted. Adjust the volume, bass, or treble controls to eliminate distortion. • Disconnect any headphones from the headphone connector — sound from the speakers is automatically disabled when headphones are connected to the computer’s side-panel headphone connector. Troubleshooting and problem resolution: • Check the headphone cable connection — ensure that the headphone cable is securely inserted into the headphone connector. • Adjust the Windows volume control — select the speaker icon from the Settings Charm or click the arrow on taskbar to show the hidden icons in Windows desktop mode, then click the speaker icon. Ensure that the volume is turned up and the sound is not muted. User Guide 33 Troubleshooting Software Problems Problem: You are unable to exit a running program normally. Troubleshooting and problem resolution: 1. Press the Ctrl, Alt and Delete keys at the same time, then select the Task Manager option from the pop-up dialog box. 2. Select the problem program, then click the End Task button. Problem: You need to install or uninstall a program. Problem resolution: During installation never abort the install process by powering the system off or through other drastic means. This can cause system program problems or even failure during system initialization. During the uninstall process, never directly delete the files or folders. This is harmful to the operating system, and might cause a system-wide malfunction. Use the following procedure to properly uninstall programs: 1. Back up all documents and system settings related to the program before removing it. 2. If the program has its own uninstaller, run it directly to uninstall the program. 3. If the program does not have its own uninstaller, then select Apps → Control Panel from the Search charm. 4. From the Control Panel, choose Programs → Programs and Features. 5. Find the applicable program from the Programs and Features dialog box and then select Uninstall/Change. 6. Perform the instructions displayed to uninstall the software. Troubleshooting Problems with Optical Drives and Hard Disks Problem: The Optical drive is unable to read a CD/DVD. Troubleshooting and problem resolution: 1. Check to determine if there is an optical drive icon in the resource manager of the operating system. If there is still no icon, contact Lenovo Service. Otherwise, continue with the next step of this procedure. 34 User Guide 2. Confirm that the CD/DVD has been properly placed in the drive. [. . . ] For the latest information or any questions or comments, contact or visit the Lenovo Web site: Service Web site: http://support. lenovo. com User Guide 61 Trademarks Lenovo and the Lenovo logo, IdeaCentre and IdeaCentre logo are trademarks of Lenovo in the United States, other countries, or both. Microsoft, Windows, and Windows Vista are trademarks of the Microsoft group of companies. Intel Inside is a trademark of Intel Corporation in the U. S. AMD, the AMD Arrow logo, ATI, AMD Athlon, AMD LIVE!, AMD Opteron, AMD Phenom, AMD Sempron, Catalyst, Cool ‘n’ Quiet, CrossFire, PowerPlay, Radeon, and The Ultimate Visual Experience are trademarks of Advanced Micro Devices, Inc. [. . . ]