I have a power mac g4 that I have found recently that when I have started it it goes toa blue screen and stays there. I can go into safe mode and it works but now sound or other benefits of course.. I bought a new harddrive today after trying to archive the other and when I go to install OSX it asks to choose the hard drive and nothing shows up .. do I need to to hold a key down or something to make it recognizable .. thanks for any help