Why can't my iPhone X display anything after I replaced rear casing?

So I've got an iPhone X with a very broken rear glass, and I got a new casing and moved everything to the new one. I did everything perfectly and neatly and when I turn it on, it won't display anything. I mean, I can hear sound when I plug it in and the Taptic Engine works and everything. I replaced the screen and it still won't display anything. Any ideas?

Update (06/13/24)

Update:
Well I checked again and it seems that the motherboard was messed up because everything else worked. Actually, Now I only want to know how it broke, because I handled everything pretty carefully and there doesn't seem to be anything wrong with it. The pins weren't bent and everything is perfect. Also, There's vibration when I charge it and when I flip the mute switch. iTunes also recognize it. However, it now heats up when I start it. Or when I connect it to iTunes. And restoring it doesn't help. it just wouldn't display anything.
This is getting very strange and curious. Any ideas?

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3 commentaires:

Is it a cheap copy backhousing? Try to put it back in the original housing, if the dasplay works then you know the replacement back housing is causing this issu.

sorry for my poor english

par

Nah it was definitely stock and perfectly working. My phone connects to iTunes and everything but the screen just wouldn't light up. I've tried a screen that definitely worked but it still wouldn't display anything. So now I'm at a total loss of what to do.

par

The ribbon cables connecting the screen to the motherboard are very very delicate, and the pins are even more delicate, I am rather unfamilier with a back casing replacement but when doing it what did you unplug if you can remember

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