Mac Mini will not boot up - Poss due to Mavericks?
I've had a MacMini since Nov 11 and it's never caused me any problems until lat night.
I updated to Mavericks on Fri afternoon and everything worked well until last night (Saturday).
On start up the screen had the Apple logo, a small revolving pattern thing and a progress bar.
The progress bar took about just under 5 minutes to finish and the screen went black and the Mac had no power.
I tried to reboot about a dozen times with the same result.
I have -
tried numerous key combinations to open safe mode (i only have a Windows keyboard)
disconnected all usb's except the keyboard and mouse
tried to reboot with keyboard and mouse disconnected
Nothing has worked
Does anybody have any ideas
Should I have left Mavericks alone?
I don't have any start up disk or external hard drive
Thanks
Mac mini, OS X Mavericks (10.9.2), I'm presuming it was 10.9.2 i updat