Hello,
I'm not sure if its called sleep, or hibernate when your computer stops working (all noises stop) and monitor goes black. A few days ago when i started my laptop i was checking my e-mail,social network etc (the usual stuff ) the laptop went into sleep/hibernate mode all of a sudden without me doing anything out of the usual.So i had to click on the power button( to resume my work and this started happening occasionally (even while I'm writing this post). Sometimes after i click on the power button the laptop wakes up (fan starts etc) but the screen is still black and it takes 1-2 mins to turn on or doesn't turn on at all. In addition once after it went sleep/hibernate it turned on itself. Also there has been like an interval of 2 hours when i played a game and it was fine . Then i started watching a video and it went sleep/hibernate. Im forced to shut it down by holding the power button for couple of seconds and sometimes it happend after the windows welcome message (before my desktop loaded)
Regards,
Hratly