Hey give it to a normal service technician he will open the case and then clean the mother board n others with chemicals they have and then dry it up. dont keep the phone with u for longer time as there s a chance of mother board being spoiled.And get it serviced as soon as possible. The red light mean ur battery is totally dried out. So once the service is being done connect the charger for 4 hours and then ull see that it is charged for 2% at the max. so then charge it for over night and it will work.
good luck