Regarding PC repair issue, please check below questions;
1. Is this problem reason with main board?
2. If change main board, can use this PC?
3. If Change main board, installed program soft will disappear 100%?
4. If program soft will disappear 100%, no need to repair main board.
5. If program soft still exist, and if can use PC after main board change, please repair it.
Please check 4 points.