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This is an excellent guide! I've had the YLOD before about a year ago, and my brother shipped it off to get it fixed for me (his COD:MW2 was stuck inside). It cost him $150 to get it repaired because the warranty had run out. While it did work for an entire year after the repair (which is very surprising with most people saying theirs only worked for about a month after getting it fixed), I definitely don't think all that money was worth it. I am extremely pleased that I was able to fix it myself with absolutely no cost to me (I borrowed a heat gun and thermal paste from a friend). No cost is way better than $150 obviously. I do intend to sell my PS3 to Gamestop though and buy a new slim, which I hear is less likely to get the YLOD due to better cooling. I will most likely open it up at replace the thermal paste though, as I've heard the paste Sony uses is very cheap, along with a few modifications for better cooling.
Long story short, this guide just saved me $150 dollars. Also, my PS3 is the 60GB backwards compatible if that is of interest to anyone.