Original post by: Ken ,


If you are installing a new drive and it does not want to come up after you install the system software,  Try restarting the computer and hold down the shift key until it comes all the way up.  Log in and see what happens.  Sometimes on new installs the system is confused and needs to boot in safe mode to figure out what it is doing.  
If this works and the desktop comes up all the way including your menu at top just go under the apple and select restart and see if all works.  Good luck