Hardware I can't launch my New3dsXL after top screen changing

[890clon]

I accidentally cut the loop of the top screen when I was changing the top cover on my console. I bought the new screen from aliexpress and place it in the console. After assembly I tried to launch it, but it failed. After pushing power buttom, blue LED lights up, a couple of seconds pass and console sharply turning off with pop sound.
The video is attached below.
First picture- my previous screen.
Second picture- screen from aliexpress in my console.
In other picture you can chek the loops
Before replacing the screen, the console worked properly.
How solve this problem? In what part can there be a mistake ? (All loops conected, motherboard has't any damage, battery is ok)
How cheсk the top screen workable or not?
Where you recomend order the top screen?(If problem will be in the top screen)
Is possible to replace loop from new screen to previous? Because past screen has damage only on loop. The Matrix is Ok.

 

[KleinesSinchen]

3DS not turning on with that symptoms means it can't find a vital component. Most likely a screen backlight (no matter if upper or lower screen).

There is not much to say from just looking at pictures. Make sure:

• All cables are fully inserted
• No cable is upside down / wrong orientation (yes, this happens sometimes)
• The connectors on the motherboard are not damaged and hold the ribbon cables at the correct position

One connector doesn't seem to be okay (last picture):



Good luck!

 

[890clon]

I've reinstall all loops in the mother board and console has launch, but now I have a new problems.
First problem, in the first launch joystick didn't work. It not reacted on the moves. I put a small piece of paper in the loop to make a good contact and it worked partly. It is reacting on vertical moves ( up and domn), but not a gorisontal ( left and right). Joystick is workable, because it worked before I started reassble console. What can be a problem? The loop is installed tightly.
Second problem. At random times consle can start ifinit scrolling the cursor on desktop on the button screen. What does the loop do in the first picture in the upper right corner with duct tape? I think it related to this problem because it has weak connection and some of them may can mix up but I'm not shure. Please give a picture with all signuted loops because I do not know what some of them do.
The connector for the Home button loop rotted when I tried to connect them. How can this be fixed? The third picture