Transcript Upgrading and Repairing PCs

Portable Computers
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Popular in businesses with traveling or
mobile staffs
Often as powerful as desktops
Major concerns are heat, battery life,
and impact resistance
Usually twice the cost of an equally
equipped desktop
Portable PC Form Factors
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Laptop
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Notebook
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The largest in size (around 7lbs)
Usually the highest performers
Smaller than laptops (around 5lbs)
Performance is usually less than laptop
Sub Notebook
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Smallest of all
Used for scheduling or special purpose
Portable PC Concerns
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Upgrade Issues
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Battery Life
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Most portables have a battery life of only a few hours
Heat
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Many are either physically unable or cost prohibitive to
be upgraded
There is little room for air circulation in the small cases
used by portables
Synchronization
Portable Unit Display Types
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Dual Scan (Passive Matrix)
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Uses two transistors to light an axis. One for the X
(horizontal) and one for the Y (vertical)
If one transistor fails, the whole axis fails
Active Matrix
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Contains at least one transistor for each pixel
Most use TFT (Thin Film Transistors)
Requires more power than Dual Scan models
Portable PC Battery Types
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NiCad (Nickel Cadmium)
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NiMH (Nickel-Metal Hybrid)
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Found in lower end portables
Li-Ion (Lithium-Ion)
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No longer used due to charging problems
Lighter than previous two, found in higher end
systems
Lithium Ion Polymer
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40% longer life than Li-Ion