hello, my xbox 360 slim gets stuck on the opening swirling xbox 360 logo screen when it starts up. usually it only stays there for 3 or 4 seconds, but lately i haven't been able to get it past this screen at all. it used to be in poor ventilation, but i moved it to a better location, still to no avail. i only have the 4gb console, so i can't remove the hdd and see if thats the problem. i have already disconnected all the cords and whatnot and tried taking the power out and then putting it back in, and that didn't work either. cannot get to any point past the opening splash screen, so i can't clear the update cache. any help? please?