|Water used in the construction of computers is very clean water. It is like de-ionized water. |
Normal water leaves residues.
Also not all parts can be dropped in a lake.
One might be able to take it apart and use distilled water and a blow dryer to try to fix it.
If it was powered on when you floated it, then it may never work again. Even some standby status is just like powered on.
Hang up and live.