Unable to boot my Mac Mini after power failure

My Mac was turned on when the power went off and then on again briefly today, I've tried several times to start, it's starts up to the greyish screen with the apple in the middle, then goes to a light blue screen with a pinwheel that appears then disappears over and over. I tried to boot with Snow Leopard installation cd but CD is getting ejected immediately.

check out this discussion.
you should definitely get a decent UPS to protect your investment.
something like the APC Back-UPS ES 700 should suffice.

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    Hi,
    In Summary:
    ==========
    I have Mac Mini (late 2009) which does not boot anymore and I need to install Snow Leopard using retail DVD (version 10.6). The OS/installer from the DVD does not seem to boot either. I always very much appreciate the efforts of true geeks. So please, any casual beginner, please do not demoralize with something like "cannot be done" etc.
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    keg55 but youyr suggestion uses the Power button too.
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