Chosen Solution

Water leaking out of my sisters tablet and I wanna know what to do

If it is an RCA then chances are you can replace it for less money than it would cost to repair it. You can take it for a professional repair which means they would take the logic board out and put it through a Ultrasonic Bath and then inspect it under a microscope looking for burns or obvious problems. Some microsoldering may be required if burned components are found. This type of repair takes a highly skilled tech and the cost is usually pretty costly. My shop will only take liquid damaged devices in for repair if the data on the device is what they want to save. We dont repair the device for the devices sake.