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#1
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Cause for power supply failure?
What can cause a pc power supply to fail?
I broke my power supply while reconnecting its power (unplug ac cord then plug it back in) about a month ago, and I think I did it again today...while I was doing the same thing. I used a power bar/power strip with no surge protector. Normally I would think that plugging in a power cord into the wall socket shouldn't terribly endanger my computer, but now I'm not so sure. Any idears? |
#2
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Cause for power supply failure?
das der die wrote: What can cause a pc power supply to fail? I broke my power supply while reconnecting its power (unplug ac cord then plug it back in) about a month ago, and I think I did it again today...while I was doing the same thing. I used a power bar/power strip with no surge protector. Normally I would think that plugging in a power cord into the wall socket shouldn't terribly endanger my computer, but now I'm not so sure. You're not doing anything bad. Maybe the power supply was designed or built badly. What brand is it? Better yet, what's its UL or CSA number? The UL number is in the form of Exxxxxx and is under a funny RU symbol where the "R" is backward". The CSA number is probably of the form Lxxxxx. You can usually find the actual manufacturer from those numbers at www.csa.ca and www.ul.com. Bad PSUs aren't designed very well to handle turn-on stress. www.JonnyGuru.com and www.HardOCP.com have info about PSUs, and the latter has a couple of reviews of budget models, including interior photos to let you see what good and bad ones look like. |
#3
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Cause for power supply failure?
On Mon, 05 Nov 2007 04:15:53 GMT, das der die
wrote: What can cause a pc power supply to fail? Too many things to list, but IMO the most common faults are in this order: Bad capacitors Poor cooling and/or fan failure Insufficient true capacity per system (generic PSU usually) Excessive current or heat on chopper transistor(s) I broke my power supply while reconnecting its power (unplug ac cord then plug it back in) about a month ago, and I think I did it again today...while I was doing the same thing. I used a power bar/power strip with no surge protector. Normally I would think that plugging in a power cord into the wall socket shouldn't terribly endanger my computer, but now I'm not so sure. Any idears? We'd need details of PSU and system but plugging it in would seem to be the excessive (inrush) current problem, but to really know you have to diagnose each one at the discrete component level. If you're buying generics then I suggest a better brand instead. |
#4
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Cause for power supply failure?
I see. Thank you very much.
kony wrote: On Mon, 05 Nov 2007 04:15:53 GMT, das der die wrote: What can cause a pc power supply to fail? Too many things to list, but IMO the most common faults are in this order: Bad capacitors Poor cooling and/or fan failure Insufficient true capacity per system (generic PSU usually) Excessive current or heat on chopper transistor(s) I broke my power supply while reconnecting its power (unplug ac cord then plug it back in) about a month ago, and I think I did it again today...while I was doing the same thing. I used a power bar/power strip with no surge protector. Normally I would think that plugging in a power cord into the wall socket shouldn't terribly endanger my computer, but now I'm not so sure. Any idears? We'd need details of PSU and system but plugging it in would seem to be the excessive (inrush) current problem, but to really know you have to diagnose each one at the discrete component level. If you're buying generics then I suggest a better brand instead. |
#5
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Cause for power supply failure?
Thank you for taking your time to reply. I found your information very
useful. larry moe 'n curly wrote: das der die wrote: What can cause a pc power supply to fail? I broke my power supply while reconnecting its power (unplug ac cord then plug it back in) about a month ago, and I think I did it again today...while I was doing the same thing. I used a power bar/power strip with no surge protector. Normally I would think that plugging in a power cord into the wall socket shouldn't terribly endanger my computer, but now I'm not so sure. You're not doing anything bad. Maybe the power supply was designed or built badly. What brand is it? Better yet, what's its UL or CSA number? The UL number is in the form of Exxxxxx and is under a funny RU symbol where the "R" is backward". The CSA number is probably of the form Lxxxxx. You can usually find the actual manufacturer from those numbers at www.csa.ca and www.ul.com. Bad PSUs aren't designed very well to handle turn-on stress. www.JonnyGuru.com and www.HardOCP.com have info about PSUs, and the latter has a couple of reviews of budget models, including interior photos to let you see what good and bad ones look like. |
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