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. [. . . ] This message may help support personnel diagnose and fix the problem(s). • If an error message occurs in a program, see the Help document of this program. Troubleshooting Display Problems Problem: Blank screen or no image is displayed on the monitor. Troubleshooting and problem resolution: 1. Check to see if the monitor has been turned on; if not, press the Power button. 2. Check to see if the monitor power cord is loose; if so, plug the power cord securely into the monitor. 3. Check to see if the signal cable to the monitor is securely connected to the connector on the computer graphics card; if not, shut down the computer then connect the signal cable of the monitor securely to the connector on the computer graphics card. Setting display background and icon properties: 1. Right-click the desktop anywhere except over an icon, then select Personalize from the pop-up menu. 2. From here, select the appropriate options to: • Change the desktop background • Select a screen saver • Select Windows color options for borders and taskbar • Select a themes 3. Right-click the desktop anywhere except over an icon, then select Screen resolution from the pop-up menu to change the appearance. 32 User Guide Problem: Ripple on screen. Troubleshooting and problem resolution: 1. Check to see if any of the following devices are located less than one meter from the computer: refrigerators, electric fans, electric dryers, UPS systems, regulators, fluorescent lamps or other computers that may be generating magnetic interference. 3. If the problem persists, contact Lenovo Service. Troubleshooting Audio Problems Problem: No sound from the integrated speakers. Troubleshooting and problem resolution: • 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. • 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. 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. [. . . ] The content of the manuals included with your computer is protected by copyright laws and rules. None of the manuals included with your computer may be reproduced or transcribed by any means or translated into any language without prior written permission of Lenovo. The software interface and function and hardware configuration described in the manuals included with your computer might not match exactly the actual configuration of the computer that you purchase. You are welcome to contact us about the manuals included with your computer. 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. [. . . ]