i know when i did the quest the screen turned black but i could still here sounds, im not sure if this is what you are talking about but if it is just try to wait it out. i think my screen turned black for a little more than a minute then it continued the story http://elderscrolls.wikia.com/wiki/Death_Incarnate
PS3 360 . Sometimes, after entering the Night Mother's coffin, black screen will be seen, and the game will appear to freeze. It may take several minutes to go away. It is recommended that the game be saved right before entering, so it can be reloaded if problems are encountered. Also, if the player click the back button while there is a black screen and waits for an hour or two the quest might continue.
hopefully you get it working