Chosen Solution

I am going to install a new logic board in our late 2011 15" Macbook Pro, but wondering if I am going to lose everything on the hard drive. When doing the resets will that wipe the hard drive, and is there any way to save the info on hard drive now? Thanks

Certainly not. Just reset Prams by keeping pressed option+command+P+R at startup until you hear the second chime. That’s all, you won’t loose any data.

WHY???its wipe hdd??? . Open it and remove hdd.conect it to pc and copy your data. Whats os? Dont hurry?