The heat gun method will work for 1 year MAX. It's best to get it repaired by a Pro like mushy mentioned.
If you use liquid flux with the heat gun the fix will last much longer. My son and I used the heat gun method a few times without flux and it would always YLOD after a few hours of intense playing. BUT after using the flux it has been over 17 months WITHOUT a YLOD.
Good luck with what you choose to do.
I might try that , the first time I used the heat gun method it worked for a week, I tried it again and it didn't work at all.
The key to using a heat gun for any type of repair is preparation and patience. There is a difference between the heatgun used to strip paint off of a car and the one used to work on PCBs. As was mentioned above, pre-heating the entire board to prevent warping is a must. You also need to carefully cover parts like capacitors and connectors with a heat shield like foil to prevent damage. Take your time and SLOWLY heat the components necessary to re-flow their solder points.
If you get is a hurry you'll turn your board into a taco, and ruin any chance of fixing it. Lastly, for the love of god, never NEVER put it in a household oven. Yes, there are ovens for PCBs, but they are specialized for exact temperature control and heat profiles to prevent damage. Attempting to "bake" your board will only result in a melted pile of plastic.
I have repaired many many xbox 360's with RROD using the correct heatgun and a lot of practice. You can do it, if you take your time.
Quartz pre-heater - £90
Aoyuo 998 INT SMD Rework system - £100
Flux, solder & stencils - £50
IPC-J-STD-001 Soldering training - paid for by my workplace
I charge £50 per console & offer a 6 month warranty on my repairs. In the last 2 years I've had 3 consoles returned within the 6 months - all coincided with me changing the liquid flux I was using.
5 console repairs = kit paid for + 2 years experience in reflow/reballing
When you get to where I am you're no longer afraid of breaking things
BTW I'm NOT selling my services....
Exactly what im talking about mushy409, a lot of people think of a Ryobi 1100 degree automotive heatgun when this topic comes up, but a good rework station like that is exactly what I use and is, IMO, the only way to do it right.
you would probably be better off using a liquid soldering flux that you can get at any radio shack i beleave and following the directions of it using a heat gun as mushy409 said is the worst thing you can do bc if you over heat it it dead, if you even bump the table the mobo is sitting on it dead, pretty much unless you do stuff like that for a living your gonna kill it wat beyond repair try selling it on craigslist for parts or ebay and get yourself a new ps3.
As i mentioned in my last post, i used the heat gun and gilksys guide and that brought my PS3 back to life after YLOD.
A couple of days later i noticed a local computer vendor had a half price day for PS3 repairs. Knowing that a reflow YLOD fix wouldn't last, he re-balled the GPU for £30 which includes a 3 month warranty.
so he reballed it for £30 most people here charge like $60.00 here ? to me that a good deal.