Toshiba laptop won't turn up

I was using a Toshiba Satellite L505D-LS5007, i went to the kitchen and when i returned the laptop seemed it shutdown by itself so my thought was that windows shut down because low battery, but when i tried to turn it again after AC power was connected it won't turn on, except CAPS LOCK key, AC power and power lights are green, nothing else, no fan, no screen. When press the power i can hear the hard drive that try to spin once or to power up, but quickly turn off or at least won't power up properly.

I tried removing the battery and pressing for 60 seconds the power button, but didn't help.

If lights are on hardrive is spinning then it might be not that bad..
Maybe your display is out. Try to turn on the computer and and do what you really do like enter a hdd password or something like that that will get you to windows login.. And try to look at the screen closely.. Without lcd light things are also visible.. If you see things then your lcd is gone if nothing is visible then try to connect your laptop to external output by vga or hdmi to check graphics unit is ok..

The hard drive don't sound like it spin at all, it sound like it power up for a second and then shut off. I must add that i pressed the eject button of the optical drive and it eject and the light blinked.

Yes, i tried to connect external display but nothing showed up.

Try removing the HD, & post back.

Removed the had and also the memory one by one, but no luck. Seems to be the motherboard, but what a strange thing that for one moment i let it there working good and a minute later is off.

Do you use the Notebook on your lap?