suddenly my ps3 stops playing all blu rays

[DonRSD]

i bought a 40gb from craigslist....worked for a week then it stopped 1 hour into ironman blu ray.

i went to blockbuster and got the dvd version to complete the final hour or ironman.

well ahyway, eventually(a day later) i got some sort of error code that meant my blu ray laser was done for.

i called playstation but playstation wants a receipt when you go to use your warranty.....i didnt have one due to buying it on craigslist.

so i went to walmart bought an 80gb ps3...swapped out the reg controller for dualshock, swapped out 40gb ps3 for new 80gb and returned it within 2 hours

told them "my wife says we cant afford this" and WHAA_LAA got all my cash back.

i feel bad for the next guy but i tried to return it to playstattion and the stupid 'we need a receipt" made me do what i had to do.

i dont understand why they cant know by seriel # when it was bought as they scan the box seriel # when you purchase the system

luckily at walmart the videogame mgr was cool and laughing at my "made up situation" so he didnt even open up the box!!