HI there my laptop has done the same thing
and the three main things it could be is the motherboard, the battery or a disk

First of all GENTLY shake your laptop to see if you can hear a rattiling noise. If you can hear a rattiling noise then it is likely that your motherboard has broken. Because the rattiling might be from a loose screw. And when a screw comes loose it can damage yor motherboard. So that might need replacing.

Or it could be the battery thats broken. You can either get a new one. Or put your exisisting battery in a tubaware then put it in the freezer overnight. And try it the next morning.

Finally it could be a disk. If you have kept a music disk or game disk ect in your laptop before you shut it own that could be the problem. But you would probably have to get a proffesional to take it out.

Hope this comes in handy

I have a similar problem. We have a so so Toshiba laptop. The blue adapter LED glows a steady blue when plugged in; the battery light glows a steady orange. When the power button is turned on, it usually makes some noises and then cut off by itself. However, it sometimes will go into the DOS [F2 key] or boot [F12] windows. It has twice gone to a DOS type window which talks about new or lost equipment and tries to repair the damage. I would greatly appreciate any assistance one can provide. thanks