Thank you so much for reverting back. But I have resolved the issue with the help of this article.

Mainly the black screen was getting due to not updating the graphic driver. So as per the article's suggestion, first I updated the graphics driver and steam client. Then reinstalled game and now I have no longer any black screen on Steam.

Hi, I need some help friends. There is a serious problem on my Steam account. Today I opened Steam for launching a game, but strange, after opening Steam, I am getting a black screen! I cant see nothing on the screen.

Then I logged out and logged n again, but still getting the same issue. Has anyone faced this kind of similar issue before? Please help. Any kind of help would be highly appreciated.