I am facing the same issue with my Moto G5 Plus. The mobile was drawn into water and instantly I pulled it back. I tried drying the phone with raw rice and sunlight. After 3-4 days the phone started working. I used it a whole day but as the better was discharged, the phone was switched off and unlimately dead. The moto service center declared that the motherboard is dead now. Please suggest if it can be fixed?