Graphic Vanished

[MahaB82A]

Manul running of playhead shows graphic in comp panel but loop running vanised the graphic in comp panel. What is the reason? video is attached.  

[ShiveringCactus]

A black screen like that suggests to me your graphics card has crashed in the background.  Not enough to fail, but something has screwed it up.  I would have expected the manual dragging to also fail to update, but that's my guess anyway.  Try completely shutting down your computer and then starting it up again.

[MahaB82A]

It is a recommended graphics card by dell.

[MahaB82A]

I tried your way of completely shutting down the computer, but it did not work. Also APPr works fine. Therefore, I assume there is no problem with graphic card.  

[MahaB82A]

Please see & use this new link to provide any solution.  

Please Solve Issue