Originally posted by 99
if the logic board is damaged, what can I do?any way to check it?
it is a little unlikely that it would just break..
I can't think of a way to check it, it's more like check everything else before assuming it's that, which is what you've done. If cables/ribbons check out and the broken ps3 still has it's original logic board, there really is not much more to it (assuming the laser or actual assembly is not damaged - You can check this by seeing if it will play a dvd/cd).
You could try to install your new disc drive and boot the ps3 into recovery mode, then select options "restore file system" and/or "restore default settings" and hope for the best.
Otherwise, you could look into remarrying a new logic board/disc drive to the ps3, although,personally I don't recommend it. The information about all of that is very limited and outdated and you can brick your ps3..I don't know much about it but I have bricked one of my ps3s trying it a long time ago lol.
or
You could always just jailbreak it and go NObd (if its a model that can be jailbroken of course)...
I hope you figure it out..good luck