My screen is not working anymore

Hello.

My ME572C tablet has almost always had some screen problems, as it sometimes didn't detect my fingers on it, or detect them but on a wrong place.

Tonight, as I was playing with it, the tactile function stopped working, but this time completely and definitively.

I still have images, I can navigate through the menues etc, but only with a pad plugged in the micro USB. I cannot use the screen at all.

Do I have to change the whole screen or is there just a small cable inside tha I have to plug again?

Thanks for your answer, and sorry for my English!