After a screen replacement, the iPhone turns on, but the screen doesnt
I have replaced the flex connector and the screen of my iPhone 6 at the same time. After fulkly reassemble it, I tried to turn it on and it worked great. I proceeded to charge the battery with the iPhone switched off and the screen never worked again. I have tried to replace the old screen but nothing worked. I know that the iPhone is on because it vibrates when I change the vibration switch position and also I connected it to a TV with the lightning to hdmi cable.
Thanks in advance
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