Hi Sue,
sorry to hear about that!
I cannot say for sure what's wrong, but I assume there is still some water which causes current flow where it shouldn't be. Maybe on the RAM chip contacts or the processor contacts.
What I'd try:
Take the unit apart entirely and put the critical parts into an oven at aout 40-50 degree Celsius, preferrable with air circulation. Let it there for some hours, maybe an entire day. That should dry almost every remaining water even under the ICs.
This procedure has helped me to make some kinds of eletronics work again after they met water.
Be careful about the screen, it may not stand much heat. The mainboard should not be a problem. Any in case the screen module comtains some electronics, too, which are seperatable from the screen itself, then put thee into the oven, too.
To make sure the temperature does not go beyond about 50 degrees, you can also put a thermometer into the oven and check it every hour.
Oh, and what you can do additionally, BEFORE using the oven method:
Buy a can of compressed air and try to blow away every drop of remaining water, especially under the ICs. This may help a lot, because the heat / air circulation has less to do then.
Good luck!
daniel
