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Buzzing through my speakers

by mattcole99 / July 19, 2004 1:35 PM PDT

I seem to have recently developed a problem with what sounds like electronic interference through my speakers. I just changed my case for an aluminium/mg alloy one by Super Flower. The sound is a lot worse when I am playing games than when I am listening to music or using cubase. My case also seems to be giving me electric shocks. I live in Bangkok and their is no earth in their electrical system so this could be the problem. I just don't understand why it is worse with games. My spec is as follows:

Gigabyte Radeon 9800pro
1Gb 400 Mhz Kingston Value RAM
2.8C p4
asus p4p800 motherboard
Egosys waveterminal 192L
Super Flower case and power supply
Behringer TRUTH 2301A Active studio monitors

If anyone has any ideas I'd greatly appreciate it.

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Uh, getting shocked?
by Coryphaeus / July 19, 2004 4:09 PM PDT

Put it back the way it was!! Are games more important than your life?

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Re: Uh, getting shocked?
by mattcole99 / July 20, 2004 12:12 PM PDT
In reply to: Uh, getting shocked?

Shocks I can deal with - they aren't that bad! Games I can also live without, but it is noticable during music and movies also (though not as much). You get used to electric shocks in Thailand anyway - their electrical system is a joke at best! I can't really put it back the way it was anyway - the thing I changed was the case...

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Re: Uh, getting shocked?
by Coryphaeus / July 20, 2004 3:09 PM PDT

What you have is called a ground fault. Stray voltage in the power supply is touching the case. Probably a poorly insulated wire or one that is pinched. It really is dangerous. Stray voltage will destroy the PC. You really need to get it fixed before the PC literally smokes, or you get a good jolt.

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Re: Uh, getting shocked?
by mattcole99 / July 20, 2004 6:45 PM PDT

Thanks for the help. The other thing that someone said it could be is to do with surges in the dodgy Thai power supply building up excess static within the case. They suggested trying a UPS to help combat the problem. What do you think?

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Re: Uh, getting shocked?
by Coryphaeus / July 22, 2004 12:06 AM PDT

No, power surges will not energize the case. You have a loose connection or bare wire somewhere. A little static electricity is normal in some cases, but it should drain through the third wire in the power cord. But I believe you said there was no third wire/neutral ground available?

I don't think it's the commercial power. If the case is energized you have a wiring problem. And installing a UPS will not help. A UPS may flatten out the voltage spikes and drops, but won't prevent the case from being energized.

You really need to investigate the wiring.

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I agree with Cory, since you recently...
by James Denison / July 22, 2004 12:46 AM PDT

...changed the case it's probably something you did installing the motherboard which grounded it out, but that seems to cause more problems than you describe, often not even booting. Look for any loose screws that might have rolled under the mobo and be shorting between it and the case.

Although the molex plugs shouldn't normally short while laying against the case, occassionally one will land on a thin screw and short against it at times. A piece of tape over the end of those unused drive plugs will insure that doesn't happen.

Why did you change your case? Was it having the same problem? If so, did you use the same power unit (PSU)? If so, the problem could be there and it should be bench tested. There are instructions on how to do that on a google search.
Google it! Take your choice of articles.

Here's a good page about PSU's. The stock PSU that comes with most systems is barely adequate. They are prone to various failures. It's possible your problem could be there, but I suspect it's elsewhere since this involved a reassembly of the computer.
http://www.dansdata.com/top420p4.htm

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