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FIGURE 1213
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Docking station port connector
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Simply lock the laptop into place and the attached peripherals come to life Figure 1214 shows a typical laptop connected to a docking station Port replicators are similar in function and design to docking stations, except that they don t offer any additional devices or connections Port replicators are simply a convenient way of collecting all of your I/O port connectors keyboard, mouse, printer, and so on into a single device that connects to the appropriate piece of hardware on your desktop
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Hardware Profiles
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Docking stations provide fantastic convenience, but with a catch the laptop has to know what hardware is available on the docking station and be able to use
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CHAPTER 12 Portable Computers
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that equipment By the same token, once the laptop is disconnected, it must know what hardware isn t available anymore Windows handles this problem via hardware profiles A hardware profile is a preconfigured list of devices Windows automatically enables or disables in the Device Manager, depending on what devices the system detects The user can also manually choose a profile from a list at bootup, as shown in Figure 1215 The manual method has become less prominent because smarter laptops can detect their current state and easily choose the proper profile via the Plug and Play process Both Windows 2000 and Windows XP configure their hardware profiles in the System Properties applet Figure 1216 shows the hardware profiles for a laptop running Windows XP One profile is for what this user calls Standalone not connected to the docking station The other hardware profile is used when the laptop is connected to the docking station In theory, you can create hardware profiles for any system, but in reality, hardware profiles are for laptops In fact, the hardware profiles features in Windows 2000/XP simply assume that if you use hardware profiles, you re using a laptop The only trick to hardware profiles is that some devices show as disabled in the Device Manager, depending on which profile is active Don t panic if you see a red X on a device in Device Manager on a laptop this might mean only that a particular device isn t being used by the current profile
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FIGURE 1215
Bootup hardware profile list
MIKE MEYERS A+ CERTIFICATION PASSPORT
FIGURE 1216
Hardware profiles
Objective 1205
Maintaining and Troubleshooting Portables
ost portable PCs come from the factory solidly built and configured Manufacturers know that few techs outside their factories know enough to work on them, so they don t cut corners From a tech s standpoint, your most common work on maintaining portables involves taking care of the batteries and extending the battery life through proper power management, as discussed earlier You also need to keep the machine clean, avoid excessive heat, and be careful about physical damage Everything you normally do to maintain a PC applies to portable PCs You need to keep current on Windows patches and Service Packs, and use stable, recent drivers Run Error-checking with some frequency, and definitely defragment the hard drive Disk Cleanup is a must if the laptop runs Windows XP That said, let s look at issues specifically involving portables
CHAPTER 12 Portable Computers
For troubleshooting, portables have distinctive issues regarding power and networking Plus, you can run into issues with the screen and input devices
Cleaning
Most portable PCs take substantially more abuse than a corresponding desktop model Constant handling, travel, airport food on the run that accidentally crumbled into the keyboard, and so on can radically shorten the life of a portable if you don t take action One of the most important things you should do is clean the laptop regularly Use an appropriate screen cleaner (not a glass cleaner!) to remove fingerprints and dust from the fragile LCD panel If you ve had the laptop in a smoky or dusty environment where the air quality alone causes problems, try compressed air for cleaning Compressed air works great for blowing out the dust and crumbs from the keyboard and for keeping PC Card sockets clear Don t use water on your keyboard! Even a minor amount of moisture inside the portable can toast a component
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