L502x performance is degrading badly

Hi, i just registered here, because it looked like this one is more active and obviously more helpful than the dell offical forum.

Anyways, i got my 502x on christmas, so it's pretty much 10 months ago.
Everything was like a dream until around july or august..

Then i started to cap the games down and all that. I used to be able running all the latest games at 1600x900 on medium/high the minimum..

Now i'm at 1280x720 and everything turned down@45 fps, pretty much every game. Also at august, ''the sound'' came.

It started out as short durations of a little whirring of the fan, like something is interrupting the fans work. It got worse with time, until i could trigger the noise(by now alot louder than couple whirrs) by turning the laptop 30 degrees in any way.

Then i took the laptop to the local warranty.(i live in estonia) They reportedly fixed it, saying that it was full of dust, also they said they couldn't find any problems with the fan. I took it back, it felt a little fresher, but everything was pretty much the same still. I didn't get alot of performance boost(nowhere near the original performance, like i said earlier) and the fan thing was still an issue.

Oh and did i mention that including the fan issue, the ''electrical burning'' smell was coming from the fan?


I took it apart a week ago, also took the fan totally apart and cleaned it thoroughly, the noise is gone now,
But now i think that i might have something bad, like heatsink intake being clogged or something like that. The worst thing is that i did not order it from dell, and i think the only warranty i have is by the local little shop i mentioned earlier.

I really cant think of what to do anymore.. help, guys?