Power Management IC replacement

My phone just turned off one day and didn’t turn on. I got it checked out and it seems that it is still receiving power but not as it should do it won’t turn on. Replacing the battery and transferring the mother Moses to another phone didn’t work. The local technician checked the motherboard for any shorts in the circuit and it seems like there are not any. And it looks like it may be an issue with the power management IC. I have a lot of data on there in the form of signal messages, multiple browsers with tons of open tabs, bookmarks and etc. that do not get backed up. I really need to the phone to turn back on so that I can transfer my data.

Does anyone know what the process would be to replace the power management IC? Or where I would be able to get a replacement? Also has anyone had experience with this happening and it being repaired?

Thanks