old 3ds dim screen

[MaRC5]

The original 3ds top screen is dark. The problem is in the motherboard - I tried to install another one and everything is fine with it, but what exactly failed on it is not clear. Flexible cable connectors are all clean, without oxides.

 

[rip-it-up]

ive only seen this when the blacklight is broken in the top screen, i normal use a smashed screen and pinch the blacklight from it.

i cant remember the 3ds mobo, but possiblily a buck regulator not boosting the voltage for backlight

i would also swap out the flex cable for a speakers, if you haven't already, and inspect the zif

 

[MaRC5]

No, there's nothing wrong with screens and flexible cables. The problem is in the motherboard, but it is unclear what exactly to look at it - the connectors all look intact and without oxides.

 

[ghjfdtg]

Same problem if you boot any of the homebrew FIRMs like Luma3DS (hold select on boot) or GodMode9?

 

[MaRC5]

Same in godmode.

 

[ghjfdtg]

Then you have to replace the mainboard or ask someone to attempt a repair. Never heard about an issue like this so chances are probably low on a mainboard fix.