Wierd G4 Problem, Need Help!!

so I was switching IDE cables between 2 hard drive today, I went to plug it back into my 10.2 and 9.2.2 drive and it boot but there is a weird problem. In 10.2 they got rid of the smiley mac and you now have the grey apple logo, it doesn't show up. it boots but there is now logo, just a white screen. and if you hold down the option key you suppose to get the drive option screen, that doesn't show up. just a white screen. I have tried the following:

1 Zapping the pram

2 Repairing the disk

any ideas? I really want to get this fixed.