Today i gave my Macbbok (2.4 latest aluminium 3 months old)to the genius bar as the DVD burner was not working and i was getting a dim light when trying to charge it (on the magsafe led it was dim green). I though ok at least i have my iMac(6 weeks old) to do my work on. I get home, press the power button on the imac and nothing, no start up sound and the screen does not even turn on. I tried holding the button combinations to reset the vram (i think thats what its called) i tried holding c and having it boot from install disk nothing. I am soooo angry, i spent £2500 at the apple store and both computers are broken. I am going to call my local apple store tomorrow and DEMAND that they see me tomorrow as their site says they have no appointments available currently. Why should i have to wait till the end of next week considering both computers where under three months old. Can anyone explain to me what the usual cause is for the screen not turning on on the iMac please.