Mac: Option to boot from different disks on boot

I'm asking this question for my brother. He has a 15-inch MacBook Pro (late 2011). He recently reinstalled OS X Lion but now every time he boots his computer he ALWAYS gets the option to chose Macintosh HD or Lion Recovery disk. I'm tech savy but I've tried resetting the PRAM and everything else I culd think of but he still gets that same screen. He is not pressing the option key when booting it just does it automaticlly. Should I do reinstall OS X Lion aain for him or just take it back to Apple and have them look at it? Thanks in advanced