Lenovo C255 All-in-One- User Manual

2 User Guide Front view of the computer Attention: Be careful not to block any air vents on the computer. Blocked air vents can cause overheating. Built-in microphone Built-in camera System Power On/Off indicator Hard disk drive indicator WIFI status indicator Volume down (this function key is avail...

3 User Guide Left and right views of the computer Attention: Be sure not to block any air vents on the computer. Blocked air vents may cause thermal problems. 1 2 3 5 4 6 Optical drive Memory card reader USB connectors Microphone connector Headphone connector Power button

4 User Guide Rear view of the computer 1 2 3 4 5 Power connector HDMI-out connector (selected models only) USB 2.0 connectors (selected models only) Ethernet connector Air vents

5 User Guide Computer stand 15º 40º Use the stand to position the display to your preference. It can be rotated 15º forward and 40º backward. Basic connector instructions Note: Your computer may not have all of the connectors described in this section. Connector Description Microphone Use this conne...

6 User Guide Note: If your computer is equipped with a wireless keyboard or mouse, follow the installation instructions for those devices. Connecting your computer Connecting the power cord Connect the power cord to an electrical outlet. We recommend using a grounded connection or a surge protector.

10 User Guide Solving Problems Follow these tips when troubleshooting your computer: • If you added or removed a part before the problem started, review the installation procedures to ensure that the part is correctly installed. • If a peripheral device does not work, ensure that the device is prope...

11 User Guide Special considerations for troubleshooting system Record the following information as it may be useful later when troubleshooting system problems:The drivers for this computer model only support the Windows 8 system. Performing Daily Maintenance Tasks Cleaning the computer components B...

Hardware Replacement Guide This chapter contains the following topics:  Replacing the optical drive  Replacing the keyboard and mouse User Guide 13

14 User Guide Overview This guide is intended to be used by customers who are replacing Customer Replaceable Units (CRUs) as well as trained service personnel who are replacing Field Replaceable Units (FRUs). In this guide, CRUs and FRUs will often be referred to as parts. Note: Trained service pers...

15 User Guide Additional information resources If you have Internet access, the most up-to-date information for your computer is available from the World Wide Web. You can find the following information:• CRU removal and installation information• Publications• Troubleshooting information• Parts info...

16 User Guide Handling static-sensitive devices Static electricity, although harmless to you, can seriously damage computer components.When you are replacing a part, do not open the anti-static package containing the new part until the defective part has been removed from the computer and you are re...

17 User Guide Replacing hardware Attention: Do not open your computer or attempt any repairs before reading the “Important safety information” in the Safety and Warranty Guide that was included with your computer. If you no longer have this copy of the Safety and Warranty Guide , you can obtain one ...

20 User Guide Replacing the keyboard and mouse Note: Your keyboard will be connected to a USB connector at either side or at the rear of the computer. To replace the keyboard: 1. Remove any media (disks, CDs, or memory cards) from the drives, shut down the computer, and turn off all attached devices...

21 User Guide Appendix. Declaration Thank you for using Lenovo products.Carefully read all documents shipped with your computer before you install and use the product for the first time. Lenovo is not responsible for any loss except when caused by installation and operations performed by Lenovo prof...

22 User Guide 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...

23 User Guide Ubuntu Linux Special Instructions The Ubuntu ® operating system Thank you for choosing a Lenovo® computer with the Ubuntu operating system. Ubuntu is a GNU/Linux operating system, packaged with the most commonly used applications including office suite, mail client, Internet chat tools...

24 User Guide Software License The end-user is free to use the Ubuntu operating system; this product contains an Ubuntu operating system trademark authorization license. You are responsible for obtaining the appropriate licenses for any other software that you install.For non-Lenovo proprietary soft...