Hi @jac1728
Is it the LCD that has the water damage or is the water somehow in between the digitizer (touchscreen) and the LCD panel?
If it is the LCD panel it will have to be replaced as it cannot be repaired.
If it is between the panel and the digitzer maybe all that needs to be done is for the display assembly to be removed from the tablet and the two components i.e. LCD panel and digitizier separated and cleaned and dried.
i don't know the tablet but the above is based on that the [https://www.amazon.com/Screen-Replacement-VK700-Digitizer-Include/dp/B08DCP46PC|digitizer] (example only) is available as a separate component or you can get the LCD + digitizer as a [https://www.amazon.com.au/Screen-VK700-Digitizer-Assembly-Black/dp/B0C4X2XT9F|complete assembly] (example only)
Here's the ifixit [guide|50388] guide that may help.
All the above is based on given that there's water damage, it has only affected the display assembly and not the systemboard in the tablet as well.
To minimize any further possible damage from occurring until you have opened the tablet and assessed the situation regarding any further water damage ''***do not try to charge or to turn on your tablet*** and then ***remove the battery as soon as possible*** (see tablet repair link below) from the tablet''.
''The impurities in the water causes corrosion and provides circuit paths for the electricity which were not in the tablet's operating design and could damage the components. The corrosion starts immediately and is ongoing until it is completely cleaned away''
If there is evidence of water damage on the systemboard you need to dis-assemble the rest of the tablet and clean ''all the affected parts'' using ***Isopropyl Alcohol 99%+*** (available at electronics parts stores) to remove all traces of corrosion and water. If possible do not use "rubbing alcohol" as in some cases this is only 70% IPA or less, can contain additives which may leave conductive residues and is not as effective. If you do have to use it check the label to verify the amount of IPA. The higher the percentage of IPA the better
Here is a link that describes what happens. [[Electronics Water Damage]]
As always with electronics, especially surface mounted pcb be gentle when handling and especially when brushing away the corrosion. You do not want to remove any components from the board. The ends of any flex cables and their connectors need to be cleaned as well
Hopefully after you have done all this the tablet ''might'' possibly work correctly again.
Here the ifixit [[Topic:LG G Pad 10.1]] repair guide.
If this process seems too daunting, take your tablet to a reputable, professional mobile phone or electronics repair service, experienced in liquid damage repair and ask for a quote for a repair. If you decide to do this, ''do it sooner than later''.