Hardware New 3ds XL: Touch screen not working, circle pad not working, screen scrolling to the side

[rzyao]

When I boot up the system, for about 30 seconds the cursor on the home menu appears to be moving down and to the right, even with the DPad, touch screen, C-stick and circle pad unplugged. I tried replacing the motherboard and even that didn't help, and I have no idea where to look next. I think the issues with the touch screen and circle pad inputs may be bad ribbon connectors.

There's also a chance that the motherboard I got was damaged in shipping, and that it's just the same issue as it the old one.

 

[IC_]

The false circle pad input is normal when the circle pad is disconnected.

 

[rzyao]

The false circle pad input is normal when the circle pad is disconnected.

ah, so with a new circle pad and digitizer I should be good to go? the flex cables are visibly worn, so that doesn't surprise me.

edit: I just swapped in the circle pad from my o3ds, and it seems to have fixed the issue, so I know that everything else is fine.