Hardware 3ds popping sound??

[Geration]

Hi, i just finished doing the hardmod to my 3ds and when i closed it and re-powered it it just shuts down with a popping sound.
I red online that should be because of the speaker ribbon cable or something like that, so i changed all the upper screen with a replace part i had apart but it still does that popping sound and shuts down.
I checked the fuses of the mobo and are fine.
What else should cause this?

 

[Ryccardo]

It means it's not detecting the backlight(s), double check the top screen audio+video+light cable* and the bottom screen light cable

* At least on a DSi, what appears to be sufficiently inserted isn't

 

[Geration]

It means it's not detecting the backlight(s), double check the top screen audio+video+light cable* and the bottom screen light cable

* At least on a DSi, what appears to be sufficiently inserted isn't

Which one is the bottom screen light cable?

 

[Ryccardo]

Which one is the bottom screen light cable?

Hard to say without knowing the exact model, but the bottom screen should have 3 cables - 1 brown large for video, a 4-pin one usually transparent for touch, a 4-pin but 2-wire brown one for the light

 

[Geration]

Hard to say without knowing the exact model, but the bottom screen should have 3 cables - 1 brown large for video, a 4-pin one usually transparent for touch, a 4-pin but 2-wire brown one for the light

It was that one, thank you very much! Just "fixed" it

 

[Byokugen]

Same problem with 3ds xl, tried re-seating cables, nothin

 

[jmhannz]

Sounds like the cables, you need to reseat them over and over, its a pain trust me I've been there, you could try cleaning them too, make sure the connectors are tight

 

[Geration]

Sounds like the cables, you need to reseat them over and over, its a pain trust me I've been there, you could try cleaning them too, make sure the connectors are tight

Fixed!

 

[Byokugen]

Sounds like the cables, you need to reseat them over and over, its a pain trust me I've been there, you could try cleaning them too, make sure the connectors are tight

Tried like 15 times, still, screens are black and after second or two POP