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Lenovo Laptop Ac Adapter Question

#1 User is offline   Stacy Jamie 

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Posted 03 September 2008 - 09:57 PM

Is it normal for the ac adapter to emit a very faint high pitched and constant ringing sound? I just noticed this yesterday as I had to reach down to plug it into a socket. It's really faint and you can only hear it when you put your ear a few centimeters next to it ... but it isn't silent.

So far, I've left the laptop running to check and the battery still charges properly and there are no fluctuations or power interruptions of any sort. While the adapter gets warm, it doesn't get unbearably hot.

Anyway, just wanted to know if it is normal.. and if so, what is the cause?

Thanks

#2 User is offline   garmanma 

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Posted 05 September 2008 - 07:28 PM

Electricity will generate noise, but I wouldn't expect any from a small power converter, but I've been wrong before. I've never put my ear close to one. The important thing to be concerned with is when it gets too hot. Warm is OK but not hot

This post has been edited by garmanma: 05 September 2008 - 07:32 PM

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