Macbook Pro 2015 with El Capitan went black screen after login I have macbook pro 2015 model with El Capitan.
Today when i clicked on reminder notification after login it fluctuated and finally went to black screen.

So I tried following steps till now:-
1. Restarted the macbook
2. Tried SMC reset 
3. Tried PRAM reset but no benefit.

Also on forced shutdown(by pressing and holding power button) and restarting the macbook apple logo is not coming at start now only sound of starting is coming.
Now login screen is also not coming just black screen in whole process.

Please give suggestions.
Summarizing the answer after getting issue resolved.

It was a technical hardware failure of motherboard in my case.
So the whole motherboard set was replaced.

P.S. - But before going directly to hardware failure please go through the steps shared in question and the comments above by @J.C. and @Tetsujin