Unless it's like below like 17?F you should be fin I would think. But, maybe let it go above 40 to be safe. Your processor will run faster if it's cold, but other components may have some issues. But, why is your computer cold?
well i tried resetting the pmu as the first part...what i did was push the button for 2 second...then waited a minute..then plugged it in and tried to start