I have a mid 2009 macbook pro that won't boot. I tried using the system recovery cd and it doesn't find the drive. Tried single user mode did the /sbin/fsck -fy command and it says the drive is ok. Tried the diagnostic cd to check hardware and it all came back good. I bought a new hard drive and put it in. The new drive is found but I can't install OSX 10.6 on it. I also bought a new copy of snow leopard and tried the install and it failed also. I have installed these drives in my other macbook pro and everything worked perfectly. Not really sure what to look for next. Does anyone have any ideas of what I should try. I really don't want to buy a new computer as I think this should be a easy fix.