fan upgrade macbook pro early 2011 13 inch

Updated to 10.7.4searched every discussion I could find on this matter. If I get it back the fan returns to normal functioning.What I did:checked the temperature sensor values, they are finechecked for crazy background tasks, there are none, CPU usage is at max 7%it does the same thing even in safe modereset PRAMreset SMCreinstalled OS X (Lion). It only does it when I open the lid more than 90 degrees. No system processes consuming high CPU, just idling.There's a twist to this issue, though. My Macbook Pro (13', early 2011, Core i5 2.3) started to behave weird, its fan (only the exhaust one, since it's a 13' Macbook Pro with the Intel HD integrated graphics) is running at top speed (6200-6208 rpms) with no reason at all. I am thinking about saving up for a 27-inch iMac, which would then be my primary machine, but if I were able to buy one, it wouldn't be for awhile.MacBook Pro :: 13' Early-2011 Fans At High Speed May 14, 2012 Now, since the MacBook Air is smaller, I know that it displays just as much as this laptop does, so I don't think that the screen size would be that big of a problem. How much would I be able to sell this laptop for on Ebay? Is the MacBook Air weaker or stronger than the laptop I am using now? Screen real estate is something that matters a lot when using a music program, which is why I initially went for this laptop. I was wandering if this would be a good idea. I really value battery-life I would probably upgrade the RAM to 8 gigs, and maybe upgrade the processor to 1.7 GHz, maybe upgrade the SSD to 256, but I might not. The laptop is a little thick and heavy, and its battery-life is nothing compared to the MacBook Air. I was wandering if I should sell this laptop on Ebay, and buy a brand-new Macbook Air, 13-inch, 2013 model. I also do some other small things on my laptop, like word-processing, web-browsing and I bring it to school everyday. I'm really into producing music, and I use Reason 6.5. It was in perfect condition when I bought it, and it still is. I bought it off of an Apple product store on Ebay about 3 and a half months ago.

It has 8 GB of RAM, a quad-core, 2.3 GHz i7 processor, hi-res, anti-glare display, an AMD 6750m and Intel HD 3000.

I currently own a MacBook Pro 15-inch, early 2011 model.

Fan upgrade macbook pro early 2011 13 inch