Burning Smell, then Smoke from Vent

So yesterday I was playing this game that my friend convinced me to buy on the Steam Store called "The Binding of Isaac", when I smelled a burning smell. I went downstairs to the kitchen and nothing seemed wrong, so I ignored it thinking it was something outside and went back to the game.
A few minutes later I smelled it again and looked up to see a puff of white smoke coming from the vent of my iMac. I quickly unplugged it and let it be for a few hours.
I've been using it very cautiously since yesterday, but everything seems normal. I'm super paranoid now. >.<
What could have caused it? Our air was off at the time and it was somewhat hot, so could it have been the game (Which I don't think is really that intesive... It's 2D.) + the temperature of the room?
And mainly, what should I do about it? Continue with normal use? Take it in to get it checked out? (I'd rather not do that as the nearest Apple Store is an hour away) I just got the iMac in December and it's the first Mac I've ever owned, I rather not say goodbye to it so soon.

A strong possibility is that one or more electrolytic capictors blew out. What you saw may have been steam from the cap dying. It may continue to work but there has been some damage that should be repaired so that one problem does not cascade into multiple problems.
Check your warranty status and if you did not purchase AppleCare when you bought the computer you must buy it while your normal warranty is still in effect. That is one year from the date or purchase. AppleCare provides fopr three years total of coverage. Otherwise you only have the one year coverage on your hardware.
Seven or eight years ago a supplier of these style caps changed their electrolyte formula. The caps ran okay for a couple of years but then started blowing out, When they did any numbver of problems would appear from bad video to shutting down and not powering up. The last series of the old Power PC chipped iMacs suffered from this capacitor plague. The problem has since been corrected but, like anything, it is possible that a cap in your system may have slide by quality control and now you see the results.
You may want to call AppleCare and see if on-site repair coverage is available for your system. Look at the Apple Support web page to send an Express Lane case with AppleCare to schedule getting a call from AppleCare. The number is 800-APL-CARE or the web site is: http://www.apple.com/support/contact/

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My iMac is in this serial number range, however I noticed this:
from linked page:
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Hello ashish15188,
Well it might be a hardware issue, and I would strongly recommend to get in touch with HP support, if you bought it recently (less than 1 year), even if you feel safe enough to go deeper and open your laptop to check the hardware.
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Cheers,
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ryip10, welcome to the forum,
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Andy ______________________________________
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When I asked how did they tested it, reply was that they kept playing games on my iPad and they didn't find any issue.. Rediculous answer..
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Greetings Catluver:
I truly hope that Mr. Jobs himsilf or his PA (personal assistant) is reading this site and particularly your post.
I started with Apple when Steve was in his garage first designing the Apple I...... I still own my Apple II+ and IIe. I drifted to the Wintel side when Apple no longer would support the II series of computers. I absolutely love Apple and all their unique products BUT....I have a similar issue which raises serious CONCERN.
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Apple iMac G5 Design Flaw:
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THE SOLUTION:
I tried figuring out a way to keep my iMac G5's internal fan on ALL the time. I can hear it cycle on and off. I assume the engineers were worried about noise. Guess what? I would rather hear noise from an efficient INTERNAL fan anyday rather than have to cool my iMac down with a fan from WalMart.
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Good Luck With Disney....Hopefully you can restore my faith there too. Ever since Walt passed it has never been the same....if you know what I mean.
Regards,
Jeff
iMAc G5 Mac OS X (10.3.9)
Message was edited by: JCGray49

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Lets make 2015 the year of the #DO
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hi Abdul_Ahad,
Im sorry to hear what happened,
I suggest you call Lenovo Technical Support for assistance, the system needs a thorough check before replacing some parts,
http://support.lenovo.com/en_US/feedback/detail.page?LegacyDocID=MIGR-76613
I think the computer can't effectively cool it self down, causing the issue.
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Solid Cruver
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Message was edited by: AnttiS

Burning Smell, then Smoke from Vent

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