How do I fix a white screen on my straight talk zte?

[Carolsuelewis]

About a month after buying this phone the phone started having a white screen on waking. Increased steadily until one day I Dropped my phone in water. Grabbed it out in secs. Dried it off. It was still working. After screen went to sleep and was awoken the screen was completely white. After restarting it, I can hear the start of tune but cant see anything.