I used to have one of the big, fat PS3's, but gave it to my brother a long time ago.
Now it doesn't work for him because I think the laser is shot because it doesn't want to play any discs. It could be another issue, though, because those versions of the PS3 are so damn old now.
Don't you have a local video game shop that could repair it for you?
cacodayum
The proper repair method is: Buy a replacement device.
Because consoles.
Hyptosis
I already bought a replacement, but I want my old fat one working again. :P