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Contributor
Posts: 39
Registered: ‎07-25-2011
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SRX220 power brick crackling noise

I have an SRX220, which uses an external power brick, and I can hear a very audible crackling noise coming from the power brick.  I submitted an RMA request, and the new power brick has the same problem.  Is this normal?  I've never heard this kind of noise from a power brick before, and it doesn't generate confidence in its safety.

Trusted Contributor
Posts: 79
Registered: ‎12-16-2011
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Re: SRX220 power brick crackling noise

Although I only have an SRX100 my power brick has never made anything remotely like those noises.  Is the input power clean?  If you have an online or interactive UPS I'd try plugging it into one of those.  Otherwise I'd say go back to Juniper.

Super Contributor
Posts: 210
Registered: ‎02-17-2011
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Re: SRX220 power brick crackling noise

I have seen this with other devices. Change your power cable. I have power cables which lock using the middle pin, and I have heard a crackling noise on some power supplies I changed the cable and the issue went away.

The suggestion about the UPS is also valid.
Distinguished Expert
Posts: 601
Registered: ‎07-23-2012
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Re: SRX220 power brick crackling noise

I've also seen this with multiple SRX220's.  never did get a clear answer whether this was "by design".