3DS won't stay stay on - makes a popping sound

Hello,

Recently I changed my 3ds LCD screen.

But once I tried to turn it on, it made a popping sounds and turn itself off after a few secounds.

I read about lossen ribbons and stuff, so I tried to disconnect everything and turn the 3DS on just to see if the motherboard can light up.

The blue light turns on for a few secounds before shuts off.

Could it be a blown fuse? I saw once that with blowen fuse the nintendo won't turn on at all..

What could be the problem? I discconected EVERYTHING, even the mic, and still it won't stay on!

Thanks.

- Theres no SD card inside.

- Theres no game inside.

- tried putting the motherbord inside a fully functationing 3DS XL.

- It charges.