New 3DS XL won't boot

I’m trying to fix my New 3DS XL. The system turns on with a blue light, makes a pop sound, then the blue light goes out. I just replaced the top screen and speaker cable with a new one and made sure all the ribbon cables for the other components had no tears or damage and that everything was installed correctly. If someone can tell me what I’m doing wrong or if something else is causing the problem, please let me know.