Switches on only download screen

[saxonac]

Hi,
I just had my S3 Galaxy cleand in the washing machine when it was on. I openned it and by surprise there was little water in it. I cleaned it and let it dry.
After a few days I switched on and the screen shows DOWNLOADING DO NOT TURN OFF TARGET. Even when I connected the power supply , the same massage occurs. There is also a massage saying 'USB control inti' and 'USB control inti END' Could you kindly help?
Thanks

 

[meyerweb#CB]

Unfortunately, your phone is probably toast. You could try taking out the battery and sealing the phone in a bag of uncooked rice for a week or so, but it's probably too late for that to help.