I recently replaced the bluray drive and board after my last board went bad. The drive takes the disk in but wont read. I'm running v4.11 and don't know what to do to get the drive keys to match again. I read about downgrading but don't want to risk messing up since it's not v3.55 or lower. It's a CECHA01 with a kes400a laser. Any help would be greatly apreciated!