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I've read multiple threads about how a "crackling" noise coming from a laptop charger is worrisome, but I recently I found that my laptop charger makes this sound only when my computer is running a high intensity program. Otherwise, the charger is completely silent and has no problems. Since I got this charger less than a year ago I am a bit reluctant to buy a new one. I was just wondering should I go and buy a new charger or is the noise normal?

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Crackling means that electricity is arcing on high demand. You should listen carefully to ensure that the noise is coming from the cable or from where it's plugged-in to the computer, and not from inside the computer.

Crackling can be caused by the cable, but equally well from the plugged port. Below are some suggestions to check both.

  • Ensure first that the port and cable plug are totally clean from dust, rust and everything else

  • Verify that the pins in the plug are straight and the connection is good

  • Connect to another wall outlet, to check if the problem is with the electrical outlet

  • If the charging is via USB, try another USB port

  • Clean the power connector using a suitable product

  • Try another charger, if you can loan one.

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