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Power brick buzzes/crackles

Last response: in Components
July 28, 2012 10:38:18 AM

First, lemme coin a new term for what my laptop's power brick does. It buzzles. ;) 

You'll need decent headphones and you'll have to turn it up.

Here is what it sounds like under load:

Here is what it sounds like without load:

I put it down to low quality chokes, but my knowledge of electrical engineering is not extensive enough to judge the safety of the brick. It sounds like a regular step-down transformer when not under load but I'd expect a neighborhood transformer to make noise, not a power brick. The periodical rhythm it makes under load baffles me. It's also kinda hot. You can smell the hot/burning plastic smell, and my ear gets quite warm while listening to the song of the power bricks.

TL;DR Listen to the sounds and tell me if my power brick is in danger of catching fire, por favor.

And yes, this isn't strictly a power supply, but it's close enough, methinks.
a b ) Power supply
a b D Laptop
July 28, 2012 11:18:03 AM

Sounds like PSU is going banana.

I killed one (on purpose) old Cooler master PSU and it sounded similar, but it died quickly.

And it smelled too, before it went kaput.

Best solution

a b ) Power supply
a b D Laptop
July 28, 2012 11:18:19 AM

Fire is an option, but it can take your parts with it.
Related resources
July 28, 2012 12:30:51 PM

Neither of those are preferable.
a b ) Power supply
a b D Laptop
July 28, 2012 12:31:47 PM

No : )
July 30, 2012 7:21:09 AM

Best answer selected by kshitijmd.