The following topics offer information to help you keep your computer in top working order. • “Basics” on page 106 • “Cleaning your computer” on page 107 – “Computer” on page 107 – “Keyboard” on page 107 – “Optical mouse” on page 107 – “Display screen” on page 107 • “Good maintenance practices” on page 108 Basics Here are some basic points about keeping your computer functioning properly: • Keep your computer in a clean, dry environment. Ensure that it rests on a flat, steady surface. • Do not place items on top of the monitor or cover any of the vents in the monitor or computer. These vents provide airflow to keep your computer from overheating. • Keep food and drinks away from all parts of your computer. Food particles and spills might make the keyboard and mouse stick and unusable. • Do not get the power switches or other controls wet. Moisture can damage these parts and cause an electrical hazard. • Always disconnect a power cord by grasping the plug, but not the cord. 106 ThinkCentre User Guide Cleaning your computer It is a good practice to clean your computer periodically to protect the surfaces and ensure trouble-free operation. CAUTION: Be sure to turn off the computer and monitor power switches before cleaning the computer and monitor screen. Computer Use only mild cleaning solutions and a damp cloth to clean the painted surfaces of the computer. Keyboard To clean your computer keyboard, do the following: 1. Apply some isopropyl rubbing alcohol to a soft, dust-free cloth. 2. Wipe each keytop surface with the cloth. Wipe the keys one by one; if you wipe several keys at a time, the cloth may hook onto an adjacent key and possibly damage it. Ensure that no liquid drips onto or between the keys. 3. To remove any crumbs or dust from beneath the keys, you can use a camera blower with a brush or cool air from a hair dryer. Note: Avoid spraying cleaner directly onto the display or the keyboard. Optical mouse This section provides instructions on how to clean an optical mouse. An optical mouse uses a light-emitting diode (LED) and an optical sensor to navigate the pointer. If the pointer on the screen does not move smoothly with the optical mouse, you might need to clean the mouse. To clean an optical mouse, do the following: 1. Turn off your computer. 2. Disconnect the mouse cable from the computer. 3. Turn the mouse upside down to check the lens. a. If there is a smudge on the lens, gently clean the area with a plain cotton-tipped swab. b. If there is debris in the lens, gently blow the debris away from the area. 4. Check the surface on which you are using the mouse. If you have a very intricate picture or pattern beneath the mouse, it may be difficult for the digital signal processor (DSP) to determine changes in the mouse position. 5. Reconnect the mouse cable to the computer. 6. Turn your computer back on. Display screen Dust buildup compounds problems associated with glare. Remember to clean your monitor screen periodically. See “Cleaning a flat-panel monitor surface” on page 107 or “Cleaning a glass-screen surface” on page 108. Cleaning a flat-panel monitor surface If you have a flat-panel computer display that has a flexible film surface, do the following to clean the special surface. Wipe it gently with a soft, dry cloth, or blow on the screen to remove grit and other loose particles. Then moisten a cloth with LCD cleaner and wipe the screen surface. Chapter 9. Preventing problems 107 Many computer supply stores carry the special cleaning fluids for displays. Use cleaning fluids developed for LCD displays only. First apply the fluid to a lint-free, soft cloth, then clean the LCD display. Some computer supply stores carry pre-moistened towelettes for LCD maintenance. Cleaning a glass-screen surface To clean a glass-screen surface, wipe it gently with a soft, dry cloth, or blow on the screen to remove grit and other loose particles. Then use a soft cloth moistened with a nonabrasive liquid glass cleaner. Good maintenance practices By performing a few good maintenance practices, you can maintain good computer performance, protect your data, and be prepared in case of a computer failure. • Empty your recycle bin on a regular basis. • Run the Windows Disk Defragmenter program occasionally to prevent performance problems caused by an excessive number of fragmented files. • Clean out your Inbox, Sent Items, and Deleted Items folders in your e-mail application on a regular basis. • Make backup copies of critical data on removable media memory at regular intervals and store the removable media in a safe location. The frequency of making backup copies depends on how critical the data is to you or your business. Lenovo makes a number of removable-media storage devices available as options, such as CD-RW drives and recordable DVD drives. • Back up your entire hard disk drive on a regular basis. • Keep your computer software up-to-date. See “Keeping your computer current ” on page 105 for more information. • K...

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