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Yesterday my laptop was connected to an unsecure power source, and today I'm hearing a weird buzz coming from the AC adapter. It seems to fluctuate depending on the CPU usage :)

Is it something bad? Should I replace the adapter?

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I strongly suspect the adapter is beginning to fail. Better to pay for new adapter now, than a new laptop later.

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  • My adapter is been buzzing for like 3 years. No failure ever since then. Some adapters just do that. But of course, a replace won't hurt. Try checking Google for similar cases. (My laptop's adapter is famous about this.)
    – Apache
    Aug 25, 2012 at 20:43

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