i know there is a way to restore it, ive read about it a few times online....maybe try a google search...or see if maybe the disk reader needs to be cleaned
You can replace the lens. youtube it. I had the issue but ended up selling it to someone who fixes it which did that fix. I had another friend selling his modded xbox and picked it up for the price I sold the ps3.
I might end up selling my PS3 slim since I don't play it but it is like new and played it probably a total of 3-4 hours.