MacbookPro 2.4 - Snow Leopard - 2 gig ram. Hi All Hope you can help me out here. The problem being if I start up my MBP, I get this: ( see pic ) I get no response from any keyboard input and to restart properly I have to pull the battery. I then press the power button holding down 'option', which gives me a choice of my 2 partitions ( this is on one internal hard drive partitioned into 2 drives - both have OS X systems ). I choose my main partition and it boots normally. A bit of background. I occasionally boot from a Linux CD ( GPARTED ). I do this so I can format / partition my phones MicroSD card. I have done this a few times with absolutely no problem. But this problem started after the last time I used it. I'm no techie - but it seems to me that on bootup the computer is looking for and not finding this Linux disk - and not then looking for other boot drives. So it gives me the 'No boot device' message. I have tried inserting the Linux CD at this point but that doesn't work. All help appreciated!