My display doesn't work after opening.

I followed S4's tear down guide perfectly. After tearing down, I tried to make my S4 normal and it's display doesn't work though LED and lights for back key and menu key work. Someone told me that connect a panel cable whose color is orange, but I did it completely. There was no accident which might give damage to mother board. There were no pins which is broken or bent. Touch-function doesn't work, either. Help me or say if my mother board is broken.

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Solución Elegida

Did you separate the glass from the LCD screen? There is a chance that the LCD is damaged / cracked and will not display anything. When you try to turn the phone on, does it vibrate for a second?

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