possible solution to noise when the laptops plugged in

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Because my school is about to force me to buy the Dell Latitude notebook, I
called Dell Tech support to ask them about the issues that someone raised
with noise interfering with recognition while the unit is plugged into
wall...


The gentleman I talked to set that this sounded like it was the power
SOURCE; that is, the source in the wall! He suggested that a UPS
(uninterrupted power supply), or at least a good surge protector (but he
said a surge protector alone might not be enough) would fix the problem...


So, is anyone (with any type of notebook) having the noise-while-plugged-in
problem using a UPS and/or a good surge protector still having problems?


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