Mac mini dosnt boot with the programmer

i use some minimacs with automatic boot every day. But one dosn't start yesterday. it is blocked. I started manually and woked again. What is the cause? solution?
Can be a power supply fail ? on/off in few secons?
there is any update solution or option to put of this kind of protection?
i haven't acess to the minimac every time that this happend...
thanks,
/a

Hi Peggy
Thanks for your reply and information.
However maybe I wasn't very clear about what I was asking.
My Mini has only Windows 7 installed on it and I'm not trying to get OS X installed.
I know I could auto boot at a specific time if I had OS X installed and this maybe my only option, but it needs only Windows 7 on the Mini.
I was wondering if there is a way to auto boot the Mini without OS X. I can do this with a regular PC BIOS, but was wondering if there is a solution for Windows 7 on a Mini.
So really this isn't a Mac Mini question but a Bootcamp/Windows problem.

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Mac mini dosnt boot with the programmer

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