Power Problems
Laptop-specific power problems
involve the rechargeable batteries and the external AC power adapters that put
the portability into laptops.
AC Adapter Power Problems
AC adapter problems fall into two
categories: damage or failure of the original AC
adapter, and damage to the computer
due to use of the wrong AC adapter. To understand these problems, we will
consider the requirements for the correct AC adapter in terms of voltage,
amperage, and polarity, and then look at power-related problem scenarios.
How
Amperage and Voltage Can Affect Performance Never, under any
circumstances, casually substitute
another AC adapter for the one that came with your laptop unless you are
absolutely sure it will not do harm to your computer. Look on the underside of
your computer where you should find a label describing the power requirements . The most important features you are looking for are the DC
input voltage, amperage, and polarity requirements.
DC input may be in the neighborhood
of 19.5 volts, 2.15 amps. Volts indicate the pressure of the electrons, while
amps (amperes) is a measurement of the volume of electrons, also called
current.
Labels on the laptop and the AC
adapter show the positive or negative polarity of the laptop power connector,
which must be compatible with the polarity of the connectors on the AC
adapter’s plug .
Now look for a label on the AC
adapter and ensure that the output from this
device and the polarity of its
connector match those of the laptop .
Connecting an adapter that does not
meet the laptop’s requirements will cause damage to the laptop. Depending on
just which parameter is wrong, and in which direction, you may destroy the
power components in the laptop, or the laptop motherboard and its components.
Some power adapters include an
automatic circuit breaker that trips when it
detects
an input power overload. This works just like the circuit breaker in your.The laptop power connector is labeled for polarity. 
No comments:
Post a Comment
thnks for come