Toshiba Satellite A75-S229 powers off when trying to accept a Ghost image...

I ask this in hardware because I can't find a better place. If you know where this question will better fit in then please help me.

Anyway, I am trying to take an image from DVD and re-do this hard drive.

I have done it before but I always have to keep hitting keys on the keyboard every few minutes to keep the dang thing from powering down.

I have looked in the BIOS to see if there are any powersave options I need to disable but I can't find anything.

Why might this machine be powering itself down during an imaging operation? Like I mentioned, I can be successful if I hit keys from time to time, but I would rather not sit in front of this thing for 40 minutes while the imaging takes place.

Thanks in advance...