Macbook power problems

Macbook power problems - tom meritt shows you how to fix the following problems in macbook related to power.

please help me! here is wat happened, i shut down my macbook for a few minutes to eat. Then i come back to it, soon i turned it on and the screen is all white and u can't see the mouse, and it wont boot. i turned it on and off a whole bunch of times and a folder shows up with a question mark blinking. and from there i didn't turn it off to show my parents wat happened. PLEASE HELP ME ASAP