So, my iMac intel took a fall. It fell on it's side and has no visible damage, in fact it didn't even turn off or stop working till I rebooted a few hours later. Now when I try to start up the desktop loads as normal but the taskbar never loads, nothing responds to the mouse, and eventually the icons dissapear, the screen goes blue and it all starts over again, cycling till I shut it off. I attempted to boot into safe mode, but after the usual long disk check I got a rebooting blue screen, similar to the nn-safe mode boot up but without icons. I've booted from the startup disk with no issues and run verify and repair on the disk. It said there were no problems. Any idea how I can get to the bottom of what might be going on?