tailieunhanh - Fix your own computer for seniors for dummies- P2

Fix your own computer for seniors for dummies- P2: The way I look at being a senior is this: We got there ahead of the rest of the pack. Let those behind us get all excited over tweets and iPods and video games that simulate the challenges and joys of life. | Chapter 1 Getting to Know the Parts You Can See Display A display see Figure 1-5 uses a flat liquid crystal diode LCD system to show characters and graphics. Displays which arrived with the first laptops are thinner and lighter than monitors use less electrical power generate less heat and may be sharper for tired eyes. The newest displays use lightemitting diodes LED instead of an LCD system. LCD and LED displays are thinner and lighter than CRT monitors. Figure 1-5 Given a choice I d get an LED display. LED displays are more expensive than LCD models but they last longer use less energy and run a lot cooler. I I IB 15 Part I A Computer Is Not a Toaster Get the Picture and Sound Cameras Speakers and Microphones Speakers Laptop computers generally have little speakers built into their cases desktop machines offer connectors for external audio equipment. For more information about these connectors see Connect the Parts Ports and Hubs later in this chapter. To get the best sound from your computer you should use speakers that have their own amplifier. Microphone A computer s microphone usually built in allows you to chime in with your own narration or participate in online conference calls. For some users a microphone can serve as a replacement for or an enhancement to a keyboard as a way to enter text and commands. Video camera Video cameras for computers called Webcams are both small some have a lens the size of the hole in a Cheerio and inexpensive so they re built into most laptops today. If you need to add an external Webcam to a desktop PC you can buy one for 25 to 75. Figure 1-6 shows a typical displaymounted Webcam from Logitech. IIIB16 Chapter 1 Getting to Know the Parts You Can See This megapixel camera can mount on top of your display. Figure 1-6 Go Online Modems and Routers Modem A modem see Figure 1-7 is an essential piece of hardware that allows your PC to communicate with the Internet or with other computers on a local network. It can be either .