When a computer user unpacks a notebook
computer, one of the first components he will see is the power brick.
This large, rectangular piece weighs a pound or two, but is essential
to the machine's operation.
The power brick is part of
the external power supply. It also provides the power for the computer
to charge its batteries. Plugging straight AC from a wall outlet into a
notebook would blow the circuits, so lower-voltage DC powers the
notebook. The power brick accomplishes the conversion. The computer is
plugged into the power brick, while a cord runs from the power brick
into a standard AC plug.
A power brick will usually have
a light on it to alert the user that it is functioning properly. If a
notebook computer will not recharge its batteries, then the power brick
may be at fault. However, power bricks are manufactured by the computer
companies themselves, and what runs one notebook may not power another.
A user will have to look for a power brick that is designed for his
particular computer model.
Since power bricks are so heavy
and bulky, they should lie flat at all times. The weight of the power
brick, if suspended, could pull the outlet from the computer, damaging
both the notebook and the brick.
The power brick will
also become warm when it is used, so it should rest on a non-flammable
surface. It should be placed on a desk or on the floor, not on a rug or
blanket. A user should never try to open or repair the power brick, a
task best left to professionals. The power brick should also be
protected from being dropped and from spills, as with any electrical
device.Most computer supply stores and Web sites stock
power bricks, so if a user needs one, they are readily available.
Depending on the computer model
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