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Old 01-12-2010, 03:36 PM   #1
Super TWiT
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My PCs smoking habit...


After installing a new sata dvd burner into my computer I turned it on for the first time. As I was admiring the new burner, something else turned out to be burning. Ozone was coming from my PC Power and Cooling Silencer!! Upon opening the case (after everything was unplugged) I found the wire to my pc fan melted. At first I thought it was my power supply but I started wondering if maybe the fan wires caught smoke upon melting and the smoke wandered into the power supply? That fan sometimes acted funny (like it would make grinding noises and I would hit it to make it stop.) Upon examining the sad remains of my fan, I found there was minimal dust amounts stuck in it so it wasn't that it was caked with dust. The power supply was rated for 450 watts and according to extreme vision's power supply calculator I should get by with a 270 watt one. Looking inside the power supply (not opening it so as to not void the 3 year warranty) I found nothing that looked to be exploded or anything. Was it the fan or the power supply, and can I trust the power supply enough to test it?
 
Old 01-12-2010, 10:06 PM   #2
bigrigdriver
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Quote:
That fan sometimes acted funny (like it would make grinding noises and I would hit it to make it stop.)
I'd venture a guess that the fan bearing is dried out and badly burned from overheating. As a result, it tends to seize up and isn't cooling things properly. That results in overheating of the power supply.

If you can replace the fan without replacing the power supply, do so. If the fan in an integral part of the power supply, it's time to get a new power supply. If you don't have the knowledge and skills to check it out safely, you had better have a service technician check it for you.
 
Old 01-13-2010, 03:42 AM   #3
business_kid
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In my experience, most devices swallow huge amounts of current when they fail electronically. Windings on such a fan could not go above 180c internally(best case) or the insulation would burn off. It is often difficult to figure out what happened first.

I doubt if it was ozone - probably flavours of plastic. Lucky you caught it before something else went up in smoke.
 
Old 01-13-2010, 08:38 AM   #4
Super TWiT
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Yeah, I am lucky. I should have been more clear bigrigdriver the fan I was talking about was a pci slot fan that I used to cool my video card. So, chances are then that the power supply is alright? I ordered a power supply tester to check it. Wasn't gutsy enough for the paper clip trick. And besides this tester thing will check the voltages anyway.

Last edited by Super TWiT; 01-13-2010 at 08:41 AM.
 
Old 01-13-2010, 09:18 AM   #5
portamenteff
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If the pc is smoking it may need "the patch." In all seriousness- don't run it again until you've solved this. It could cause serious damage to the board, and processor as well as wires and IDE cables.
 
Old 01-16-2010, 10:35 PM   #6
Super TWiT
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Yeah, it turns out that the fan was all the problem turned out to be. Power Supply tests out fine. Although I did have to use some electrical tape to tape over a nick in the insulation that occurred because of the melting.
 
  


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