Display blank, key board light not working, won't wake up if sleeps.

Hi. I just bought a Toshiba Satellite P850 and after two weeks I had the first big problem.
It starts normally first time but after a shut-down and a few hours later start,the display is blank, any light on.The back light keyboard the same - only the power button and battery/wireless-connection have the light on.
If I shut it down again and then restart (by pressing the power button) nothing happened same screen and no light.
Tried to do this.. remove battery,press pow. button for 30-60 sec,plug charger,and the restart. it works. but after a shut-down and a few hours later restart,I have the same problem. If sleep mode it won't wake up.
Don't know what to do.. it's a brand new Toshiba Satellite. used a few hours a day for two weeks.

It sounds like the computer is going into Sleep mode or Hibernation and not coming out of it. Go to the Control Panel and select Power Options. Whatever your current power setting, select the Advanced settings under it. Check out your Sleep and Hibernation settings. In this case, I would disable them. You might want to enable the Screen Saver and let that kick in if you're away from the computer for any length of time.
In cases of mysterious computer issues, the best policy is to simplify. Reduce the number of attached devices. Keep the number of open applications down to a minimum. See if you can figure which hardware or software is causing this problem. And you should be able to fix it.

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