I have a 2 month old 21.5 iMac. I shut it down last night and when I tried to start it up this morning it was stuck on the initial white start up screen with nothing but blank white on the screen. I reset the SMC and reset the P-Ram, ive tried booting it off of the disc but nothing seems to be working. I dont have anything else plugged into it besides the power cord and the wireless keyboard and magic mouse. I dont know why it wont work but I am in desperate need of help.