laptop black sreen

Hi guys, I'm new here and really hope I can get some help :) I was using my laptop normally (Samsung np-sa31, Bremen - M motherboard), I turned it off, by pressing the power button and then closing the lid if I remember correctly since I was in a hurry. After coming back to the device, the...

Im having a Hp pavillion dv6 laptop and it was heating up because of the dust inside the fan..so today i disassembled the whole laptop cleaned all the dust, also i removed the heatsink and applied a little bit of thermal paste after removing the dried one..after that i reassembled the laptop and...