external/brick LCD power supply whine, annoying, but only in standby

[rancur3p1c]

here's an FFT analysis. It's pretty noticeable from 10 feet away in bed [click box link to view image]:
https://app.box.com/s/e97vfzs2h0ascf7o5uy8bof4hwhpckym


Brand new with QNIX QX320QHD. I could:

1. contact seller for another one. Will the new one have problem?
2. find another 6a12v supply from a reputable source (where do I find one of those?)
3. disassemble and stick shoe glue on all the transformers/caps? I don't konw how to crack it open though.
4. [preferable/easiest] build a sound deadener thing out of an old amazon/newegg box and some cheap home depot foam. can give breathing room, but still worried about a bit of heat ....


Make/model is SAWA-02-600, like this one: http://www.aliexpress.com/item/Sanhu...013102233.html

[Th3_uN1Qu3]

Re: external/brick LCD power supply whine, annoying, but only in standby

Easiest solution would be to add some minimum load resistors. It will burn a bit of extra power but will get rid of the noise. The power brick is poorly designed and oscillates with low or no load, hence the whine.

[rancur3p1c]

Re: external/brick LCD power supply whine, annoying, but only in standby

so it already idles at 7w-- or at least consumes 7w-- instead of the 0.5w standby that it's supposed to be. You think more would help? Also, I am handy with glue just stick it in there, but I wouldn't actually yeah I would. Nevermind. But still, it already uses 7w at idle, so...

it does have 2 screws under the rubber feet on it, I'm hoping it's a clamshell that I could easily crack open and not bonded/plastic-welded shut

[ben7]

Re: external/brick LCD power supply whine, annoying, but only in standby

so it already idles at 7w-- or at least consumes 7w-- instead of the 0.5w standby that it's supposed to be. You think more would help? Also, I am handy with glue just stick it in there, but I wouldn't actually yeah I would. Nevermind. But still, it already uses 7w at idle, so...

it does have 2 screws under the rubber feet on it, I'm hoping it's a clamshell that I could easily crack open and not bonded/plastic-welded shut

Is that 7W idle with the brick plugged into the monitor? If not, that doesn't seem right at all. It might be fooling your power meter.

-Ben

[Khron]

Re: external/brick LCD power supply whine, annoying, but only in standby

And where were those 7W measured?

[stj]

Re: external/brick LCD power supply whine, annoying, but only in standby

sealed bricks are an oven, it may have bad caps in it.