So my laptop adapter has had on and off humming noise from the adapter for the past year. It was random. Now its suddenly beeping + huming, but only when the laptop is on. If its off, then it doesnt make any noise. I should also note i live in Canada (so 120V) but I'm currently out of the country and in a country with 220V. The adapter is rated for it.
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2/18/13 at 5:51pm