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johnnie7 wrote:
I'm having a problem here that's a bit scary. Often I get electricuted by just touching the chassis of my computer. I've changed to a new PSU and a new chassi, but it still happends no matter what combination I'm using. Leaning over it to fix a cable behind it, just touching it and similar often results in a bad chock, sometimes even so bad that it shortcuts the computer and it goes black... This CAN'T be good for the hardware (I know it's not good for me!). Anyone have a clue where to start looking for a solution, what ahve I done wrong in both machines that cause this? Is it related to the PSU, the case, the motherboard, what?? have you got a scanner conected to your pc? Nope, external connections are ethernet to a ADSL modem, VGA cable to monitor and line in/out to my stereo amp. Best Wishes Thomas |
#2
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Electric shocks, please advice!
have you got a scanner conected to your pc?
john "Roger" wrote in message news:1jbWa.51152$zy.23767@fed1read06... spodosaurus wrote: Thomas Andersson wrote: Hi! I'm having a problem here that's a bit scary. Often I get electricuted by just touching the chassis of my computer. I've changed to a new PSU and a new chassi, but it still happends no matter what combination I'm using. Leaning over it to fix a cable behind it, just touching it and similar often results in a bad chock, sometimes even so bad that it shortcuts the computer and it goes black... This CAN'T be good for the hardware (I know it's not good for me!). Anyone have a clue where to start looking for a solution, what ahve I done wrong in both machines that cause this? Is it related to the PSU, the case, the motherboard, what?? Best Wishes Thomas You might want to post this to alt.comp.hardware.pc-homebuilt...nevermind, I'll do that now... You have a short somewhere in there. If the motherboard and components are not already fried (I'd bet they've already sustained damage) then I'd suspect the short is in the power supply itself, or you've managed to damage a wire coming out from the power supply and this is contacting the case. Either way, don't use the computer anymore until this is fixed. I am not an engineer, so there is probably better advice elsewhere. But I think an outright short would fry something. One possibility is you are charged up, not your PC case, and you should be able to duplicate the static shock by touching the screw on a nearby outlet cover. The other possibility is your case is charged up because it is not properly grounded. Somewhere there should be an electrical contact (just metal to metal) between the neutral wire on your power cord, the power supply, and the case. This contact should drain off any static charges caused by spinning fans, etc. In the unlikely event you have two problems, both a grounding problem and a wire short, fixing only the gounding problem should cause something to fry, hopefully not yourself. Roger |
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Perhaps there is no ground at the outlet, i.e. no connection between the
ground pin and the real ground. -=- Alan On 07/31/03 12:13 pm Thomas Andersson put fingers to keyboard and launched the following message into cyberspace: Hmm, but as I said this occurs in both my brand new system as well as my old one, or any combination of the two (cables, PSU etc). I'm gonna experiment with all external cables today and see if any single one is the culprit. |
#4
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spodosaurus wrote:
You have a short somewhere in there. If the motherboard and components are not already fried (I'd bet they've already sustained damage) then I'd suspect the short is in the power supply itself, or you've managed to damage a wire coming out from the power supply and this is contacting the case. Either way, don't use the computer anymore until this is fixed. Hmm, but as I said this occurs in both my brand new system as well as my old one, or any combination of the two (cables, PSU etc). I'm gonna experiment with all external cables today and see if any single one is the culprit. Have an electrician check your outlet. Maybe it's not properly wired? |
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Thomas Andersson wrote:
spodosaurus wrote: You have a short somewhere in there. If the motherboard and components are not already fried (I'd bet they've already sustained damage) then I'd suspect the short is in the power supply itself, or you've managed to damage a wire coming out from the power supply and this is contacting the case. Either way, don't use the computer anymore until this is fixed. Hmm, but as I said this occurs in both my brand new system as well as my old one, or any combination of the two (cables, PSU etc). Same power cable from the wall to the computers? Do you scuff your feet when you walk? I'm gonna experiment with all external cables today and see if any single one is the culprit. Best Wishes Thomas -- Are you registered as a bone marrow donor? You regenerate what you donate. You are offered the chance to donate only if you match a person on the recipient list. Call your local Red Cross and ask about registering to be a bone marrow donor. spam trap: replace shyah_right! with hotmail when replying |
#6
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Or buy one of those home socket testers before spending huge cash on an
electrician "David Matthew Wood" wrote in message ... spodosaurus wrote: You have a short somewhere in there. If the motherboard and components are not already fried (I'd bet they've already sustained damage) then I'd suspect the short is in the power supply itself, or you've managed to damage a wire coming out from the power supply and this is contacting the case. Either way, don't use the computer anymore until this is fixed. Hmm, but as I said this occurs in both my brand new system as well as my old one, or any combination of the two (cables, PSU etc). I'm gonna experiment with all external cables today and see if any single one is the culprit. Have an electrician check your outlet. Maybe it's not properly wired? |
#7
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Hey Johnnie, what has a scanner connection got to do with getting shocks
when touching a case? I'd really like to hear the explanation of your reason for asking. You should be asking him how old the wiring in his house is, or is the wall socket an old 2wire socket, which has no grounded conductor, or a modern 3 wire socket, which is supposed to have a properly grounded ground wire connection. The potential difference above ground from static electricity on one's body is discharged when a properly grounded case is touched. Short circuits from motherboard to case provide different kinds of electrical shocks. "johnnie7" wrote in message ... have you got a scanner conected to your pc? john |
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i had a pc to repair once....dood had a HP scanner...the scanner was live
and took it earth thro the pc case.... must been a wirein fault...scared the **** out of me ... "alvin york" wrote in message ... Hey Johnnie, what has a scanner connection got to do with getting shocks when touching a case? I'd really like to hear the explanation of your reason for asking. You should be asking him how old the wiring in his house is, or is the wall socket an old 2wire socket, which has no grounded conductor, or a modern 3 wire socket, which is supposed to have a properly grounded ground wire connection. The potential difference above ground from static electricity on one's body is discharged when a properly grounded case is touched. Short circuits from motherboard to case provide different kinds of electrical shocks. "johnnie7" wrote in message ... have you got a scanner conected to your pc? john |
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