There are many symptoms of this issue as in you may notice the following things
1)) Note is not booting up at all.
2)) Light on the keyboard, power cable light, wireless light etc are glowing but nothing on the computer screen, its completely black.
3)) The arrow "cursor" is there on the black screen & nothing else.
Whenver we face this kind of issue, suppose we are facing the issue when there is no light/LED glowing on the computer, check the power cables & make sure that there is no problem with the connections.
The step is to go for POWER DRAIN
The second step which should be followed to get rid off this issue is to go for HDD & RAM RESEAT.