Hi @ezzgen
Maybe check if you can find the problem on the motherboard before replacing it with another.
Here's the [document|31704|service manual] for the phone.
Go to p.84 Sect. 8-4-6-1. to view the ''Cable Charging Part (Normal/Fast) troubleshooting flowchart.''
Use Ctrl +f to find the components mentioned in the flowchart in the board layout images on p.76-p.77 (you will have to zoom in to 400%+ to find and see them :-).
The parts list is on p.29 -p.42 so if you find a faulty part the part's ID and part number can be found there. Search online using the ''part number only'' to find suppliers.