I got a PS3 second hand (so no returns) and it wanted me to restore the system, so I did. Then after I restored it I shut it down and turned it back on but it wants me to rebuild the database. I let it start but it never finishes. Right now it's stuck at 51% but it's been stuck at different percentages before (I've tried it a few times). Longest I've left it was 6 hours to see if it was just one long part. Is it broken or do I just need to wait longer? Is there anything else I can do to fix it?