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Sound-strange noises!


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#1 arthur heaton

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Posted 25 February 2011 - 12:20 PM

Like several other posters on here I'm getting strange noises on sound ,all of a sudden.I've made no changes to the system to provoke this,and checked all the obvious causes- monitor,fans, power supplies for modem etc.There are two sorts of noise-
1) A general crackling and hissing-heard as soon as the speakers are connected-and with both sound card and mother board sound disabled.
2)Assorted whines and whistles associated with the HDD operating-very muted with both drivers off.noticeable with internal card and B... loud with the after-market card operating-continuous whine when playing music!
The hard drive ,sound card and power supply are all less than 6 months old,and I've tried moving the power supply cables as far as possible away from the IDE bus leads.My instinct says some sort of grounding(earth)problem,but I can't cure it .
Has anybody found a cure for this yet?

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#2 MrBruce1959

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Posted 25 February 2011 - 12:55 PM

Can you tell us a little bit about the speakers you have?

Do they have their own built in amplifier with a wall mount type power supply?

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#3 arthur heaton

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Posted 25 February 2011 - 01:13 PM

Speakers( Logic L205) have their own power supply, but the noises are also present when using headphones.

#4 MrBruce1959

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Posted 25 February 2011 - 01:25 PM

Speakers( Logic L205) have their own power supply, but the noises are also present when using headphones.

Head phones that are plugged into the speakers headphone jack or your sound card jack?


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#5 arthur heaton

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Posted 25 February 2011 - 01:31 PM

Sound card jack(both). Back later,work calls!

#6 computerxpds

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Posted 25 February 2011 - 01:33 PM

I have this issue when using headphones on the front of my box but thats only because of unshielded wires that are near the usb ports. If you have any usb devices near the sound card/ports then try to move them away.

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#7 arthur heaton

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Posted 26 February 2011 - 07:18 AM

Right, I've reconfigured the PCI boards to move the sound card as far away as possible from everything-no change!The slot order from the top is now :-
AGP -Graphics
PCI -USB Hub
PCI -Phone modem
PCI -Ethernet adaptor
PCI -Empty
PCI -Sound Card

There no USB slots on the front of the machine

#8 arthur heaton

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Posted 28 February 2011 - 03:58 PM

Well, looks like we're all stumped! I had a chat with our PC guru at work and he thinks that everything points to a malfunction on the motherboard.Save up for new PC time, methinks.




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