Screen going black with video

[iPhone4UK]

http://www.youtube.com/watch?v=RLqnwPunWm0&feature=youtube_gdata_player

As you can see when moving the screen is goes black. Have done a SMC and makes no difference. I'm willing to fix my self much cheaper than apple just need know what to fix!

 

[Detrius]

Verify that when the screen is dark that there is still a picture on it. If so, it's the inverter cable.

 

[iPhone4UK]

Verify that when the screen is dark that there is still a picture on it. If so, it's the inverter cable.

No there is no picture. its just black.

 

[Detrius]

Are you sure? Did you shine a light on it?

Try pinching the LCD around the edges. Does anything change? Try flexing the LCD itself. If the LCD is fine, suspect the LVDS cable.