No top screen display, even after replacing
Going off of a previous post, I've been attempting to repair a friend's 3DS XL. After doing some work, the 3DS turns on but the top screen has no display. I replaced the top screen, but still have the same issue, it's as if nothing changed. I acknowledge that I may have messed up the ribbon cable to have the same issue, but I'm not sure what else to try. Is there anything else that could cause the top screen to have no display?
Is this a good question?