It won't turn on (blue light doesn't turn on either)

Hello!! Yet again having problems with this 3ds.

I've replaced the top screen, and now it won't turn on.

I haven't done anything with it after replacing said screen and now nothing works, I don't know if I broke something or forgot to plug something back in or if it just managed to break by itself.

Here's some extra details:

It will charge for a few seconds (Meaning the charge light will turn on and turn off after a few seconds)

When I press the power button nothing happens, no power light, no popping noises, no nothing.

The system does not have custom firmware (CFW) installed.

I have tried booting it in safe mode already.

I have tried taking out the SD card and turning it back on, I have also tried taking the SD card out and putting it back in.

I have tried cleaning the battery plug in thingy (the little yellow rectangles on one of the batteries sides) with some rubbing alcohol and it still won't work.