Plastic burnt smell

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NoNameExe

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Feb 15, 2016
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Hi here is my config 1 years old :
Thermaltake berlin
Msi h97 pc mate
I5 4460
Kingston hyperx fury 2x4gb
Msi gtx 750 ti tf
Recently I installed the Tx3 Evo cooler. My temps are fine, 30 celsius in idle. Everything runs fine but I get a strange plastic burnt smell coming from pc. He is not coming from the PSU, but the smell is coming from the fan-side area of the new cpu cooler. There are not signs of burnt stuffs like condenser or cables.
What could be the problem?
Any help is appreciated. (and sorry for my bad english).
 
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riccardi50

riccardi50

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Nov 27, 2010
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If it is coming from the heatsink then I would take it off and inspect it carefully. If something is burning, you should be able to see from where. Also, see if there was something that accidentally got put on top of the CPU when the new heatsink was installed, like a piece of lint or something. That would certainly cause a smell.
 
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NoNameExe

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Feb 15, 2016
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Hi and thanks for your time. When I opened the case I found the 24-pin connector that was not completely plugged in the motherboard for about 2 millimeters and now I fixed it. Can this cause the plastic burnt smell? Did my PSU damage something? Am I paranoic? :p
My voltages (3.3, 5 and 12) were fine.

However I uninstalled the tx3 evo and sent it back for missing screws. Now I have my CPU without any cooler. I am waiting for the new cooler. Should I cover it for 3/4 days?
Thanks.

Edit : I didn't find extraneous body on the top of my CPU.

Edit 2 : After some searching I think the smell was coming from ozone formations from electric sparks or arcs in the 24 pin connector.
 
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NoNameExe

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Feb 15, 2016
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Ok. I am now waiting for the new cpu cooler. I hope I fixed the problem plugging-in the 24 pin connector that was causing bad smell. Did you ever have problems like this?
 
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NoNameExe

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Feb 15, 2016
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Up. I removed the 24 pin connector and now I can confirm at 100% that the smell (like plastic/metallic burnt) is coming from it. The pins aren't burnt or bent. The plastic cover is ok. Should I be worried?
I didn't try to turn on my PC after I have fixed the connector.
 
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riccardi50

riccardi50

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I think you nailed it. If the connector wasn't plugged in tightly it could have been arcing some and burning the plastic some. It still should be fine and I would go ahead and try it once you get your heatsink.
 
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NoNameExe

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Feb 15, 2016
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Ok. I installed the new CPU cooler and all works fine. I replugged-in the 24 pin connector but I still get a slight metallic plastic burnt smell from the connector (i think it is ozone).
It isn't a strong smell but it is strange.

Up.. Do you have any ideas? What could be the problem?
 
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NoNameExe

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Feb 15, 2016
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Thanks for your answer. I can smell it around the motherboard like near cpu. When I unplug the atx connector I smell the "common electronic smell" like tv or monitor smell from it. My PC works very well, motherboards circuits and condensers are fine. I really don't know what is wrong.
 
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