I need the rear system of the iPhone 13 mini.

Hi everyone,

I need a new rear system for my iPhone 13 mini. The phone doesn’t turn on anymore. When it’s plugged in, sometimes the Apple logo flashes briefly, but it never fully turns on. This keeps happening over and over.

I went to the Apple Store and a technician told me that the motherboard is dead, and that I should buy/replace the rear system of the phone.

Does anyone know where I could find a reliable replacement or have any advice on this?

Thanks in advance!