ASUS P7P55D-Pro - noise in the speakers when the computer is turned off?

Question

Iron

Hello!
Available:
ASUS P7P55D Pro
acoustics 4U A500 2.1, connected to the built-in sound card.
PSU: Chieftec A135 APS-750C
OS - Win7 x64.
The problem is that when the computer is turned off, noise appears in the speakers, very similar to 50Hz.
The noise disappears only after a certain OS boot step.
Furthermore.
Some time ago I installed the native driver on the sound card and it looks like the system got so tricky that it started saving electricity by turning off the power of the sound card. And now it looks like this:
1. The computer is turned off - the speakers are cracking
2. The BIOS is loading, the system starts loading - they are cracking
3. Loading the OS goes through some stage, and the crack disappears - it looks like the driver has applied power to the sound card.
4. The OS is fully loaded, the login melody is lost - there is no cod 5. A few minutes pass, and
kaaaak ...
the card is in use - everything is ok. Stop playback - and again.
7. If you pull out the audio cord from the computer, the crackle disappears, i.e. the problem is not the cord.
I've lost count of how many times I've returned home under the terrible crackling of the speakers - the volume of the buzz directly depends on the volume at which the speakers are turned on.
Excavations in the properties of the sound card and setting up the OS power plan did not give anything - the sound card turns off some time after it stops being used.
During the time this problem has been observed:
1. I changed the power supply (although it was almost the same, but still different)
2. I rearranged it three times and moved the computer around the apartment (with reconnections, etc.)
Nothing helps.
3. Several times I changed the cord with which the speakers are connected to the computer.
Suddenly, who has already come across - I ask for help or advice where to dig.

Answer 1

The problem was solved in an elementary way.
Tired of everything to hell. I took my audio cord (from the computer to the acoustics), wrapped it (not very tightly, with a step of about 1 cm) with what was at hand at that moment - a piece of wire. It began to buzz even more - it means that the problem is still in the wire, since this has affected. I stripped the wire that I wrapped around the cord, and connected the winding to the center contact of the audio plugs, on both sides of the audio cord. Everything was taken by hand. It looks, of course, creepy - now I'm looking for a factory-made three-core shielded cable - it turned out that there was a shortage, I couldn't find it right away. They advised me to take two pieces of a television coax, put the central signal on the screen, and the channels on the core.
As I sit and think.

Answer 2

make grounding for acoustics

Answer 3

There was a similar problem on cheap acoustics. It turned out godlessly noisy transformer and crooked diode bridge.
I soldered the bridge nafig, instead of it I directly hooked the charger from the long-dead Nokia phone (pulse rectifier, 9V, 0.75A) I
forgot about the rumble in the speakers as a terrible dream. Good luck )

Answer 4

This started for me when I changed the cable from the coma to the amplifier, it was native, but short, I bought it a little longer (3.5 to 3.5). And then just what you describe started, only while the computer is running, everything is fine with me. The point is in the cable, but how it is connected, I have no idea, maybe there is a different resistance or something else.

Answer 5

Maybe take a separate sound from friends and test it with it?

Answer 6

I have the same thing, it does not depend on the computer / sound. Speakers Sven 2.0.
And here's another feature: after stopping playing the sound, the noise appears after a few minutes (that is, it does not depend on whether the computer is turned off or on).