Had the YLOD in my original launch model back when FFXIII came out. I remember because it kept me from finishing (thank god) and I had to disassemble it to get the disc out since I had borrowed it from a friend.

I never bothered trying any of the supposed fixes, though maybe I should have since it was out of the warranty period anyway, and even if it wasn't, I had to void it to get the disc out (call me crazy, but I did not trust Sony to give it back if I sent it in). I also didn't really need any of my save files so it didn't bother me. I just bought a slim and said screw it, hoping the issue had at least been fixed with the new hardware iteration as they often are.