Hey guys i am having a weird problem with my brand new imac.. I bought it custom made last friday with ATI Radeon HD 4850. Now here is my issue.. Every time i boot up it takes a while for the screen to turn on. I hear the start up sound and HDD working and all that but screen stays off for another 5+ sec. before finally going grey before apple logo comes up. Now I thought this isn't an issue since i did order it with ATI card instead of standard Nvidia. Figured different cards react differently. However, later on after playing a game for few hours and doing a restart it would do the same thing, but the screen would never turn on. Just stay black forever until i shut it down and wait a minute or two then power it back on. So to clear this up. What happens is, i push power button, start up sound happens, then black.... like it is off, not even the back light. This only happens every few days, not every restart.. I reset SMC, PRAM, ran hardware test, spoke with apple on phone, went to genius bar, and after all that and being passed around now the apple engineers are looking into my problem and i am expecting a call back from them. So i guess my question is, is there anyone else with this setup (ATI Radion) that has this issue? BTW besides that it run like a dream..