User manual LENOVO C540 57320527

[. . . ] Machine type: 10102/4773 [C340] 10103/4751 [C345] 10104/6595 [C440] 10105/6596 [C445] 10110/6267 [C540] Lenovo C3/C4/C5 Series User Guide Version 2. 0 2012. 08 31502285 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. [. . . ] Troubleshooting and problem resolution: For computers equipped with the OneKey Recovery feature, the system recovery feature needs to occupy some hard disk space. Further Technical Explanation: The nominal capacity of the hard disk is expressed in the decimal system as 1000 bytes. But the actual hard disk capacity is expressed in the binary system as 1024 bytes (For example, the nominal capacity 1G is 1000M, while the actual capacity 1G is 1024M). The capacity of the hard disk shown in Windows can be calculated according to the calculations in the following example: The nominal capacity of the hard disk is 40G, while its actual capacity should be: 40 x 1000 x 1000 x 1000/(1024 x 1024 x 1024) = 37G. If the Service partition of 3G - 3 x 1000 x 1000 x 1000/(1024 x 1024 x 1024) = 2. 79G is subtracted, the capacity of the hard disk shown in the system can be obtained. User Guide 23 The capacity of the hard disk as calculated using this method may be slightly different from the actual capacity due to the rounding of totals. Special considerations for troubleshooting Windows Record the following information as it may be useful later when troubleshooting system problems: 1. The drivers for this computer model only support the Windows 8 system. 2. When you use the Windows Media Center to watch TV, be particularly attentive to the following: • In the following two situations, you must re-save a channel list: a. When you change your TV signal from digital to analog, your saved channel list for digital TV is deleted. When you want to watch digital TV again, you must create and save a new channel list. b. When you change your TV signal from analog to digital, your saved channel list for analog TV is deleted. When you want to watch analog TV again, you must create and save a new channel list. • You must set the TV tuner input signal to analog before you can watch Teletext programming. Windows Help and Support If you have a problem with the operating system, see the Windows Help and Support file. To open the Windows Help and Support file, do one of the following: • Select the Settings charm, then select Help. You can also get online help and support by clicking on one of the two links listed under More to explore. 24 User Guide BIOS setup utility What is the BIOS setup utility?It communicates basic computer information and provides options for setting boot devices, security, hardware mode, and other preferences. 2. Repeatedly press and release the F1 key after turning on the computer, then select Startup → Boot Priority. To change the boot mode, start the BIOS setup utility and set boot mode to UEFI or Legacy support on the boot menu. If you need to install a legacy Windows operating system (any operating system before Windows 8) on your computer, you must change the boot mode to Legacy support. The legacy Windows operating system cannot be installed if you don’t change the boot mode. User Guide 25 Performing Daily Maintenance Tasks Cleaning the computer components Because many of the computer components consist of sophisticated integrated circuit boards, it is very important to periodically clean the computer to prevent dust buildup. The cleaning supplies you need to clean the components include: a vacuum cleaner, a soft cotton cloth, pure water (preferably purified or distilled water) and cotton swabs. Attention: Before you clean your computer, disconnect the computer from the electrical outlet. Do not use liquid or aerosol cleaners, which may contain flammable substances. Note: To avoid damaging the computer or display, do not spray cleaning solution directly onto the display. Only use products specifically designed for cleaning displays, and follow the instructions included with the product. [. . . ] 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 41 Trademarks Lenovo and the Lenovo logo, IdeaCentre and IdeaCentre logo are trademarks of Lenovo in the United States, other countries, or both. [. . . ]