Wifey went to wake her 4-core Mac Pro (running Snow Leopard, 14 GBs RAM) and found that Adobe Bridge hung itself. Suddenly, the Mac told her she failed to eject a drive properly. It wasn't specific. She then went to close out all the other programs from the tray, and did a reboot. The Mac now hangs to the gray screen with the apple logo and sounds like it's trying to access the main HD repeatedly.
I unplugged it for 15 mins, then plugged it in for 15 seconds and then turned it on (trying to do an SMC reset). No effect.
I hit D while booting, trying to get to Apple's diagnostic. No effect.
I hit option while booting, trying to point the boot process to the DVD instead and try to run from it. The computer came to a gray screen with the mouse cursor and nothing more.
I tried to go to safe mode, hitting Command+Shift+V. Got a black screen, with the computer trying to boot from "\System\Library\CoreServices\boot.efi" and it was loading kernel cache file something something. Four periods with a blinking cursor... Then nothing for about 5 minutes. Nothing but that sickening sound of it trying to access the hard drive again. Then it reboots itself. Gray screen, more noise.
I want it to be the main hard drive failing, but since I can't get to diagnostics via D I'm concerned about the mobo. Any help? Heading to the Apple store tomorrow so please pray for Marty (the Mac).