VERONIKA K, as with any fluid immersion time is vital to prevent corrosion. Rice will '''not''' help you. It does not prevent corrosion and will not repair your phone. Use [http://www.ifixit.com/Device/Samsung_Galaxy_S4#guideList|these guides] to disassemble your phone. Use some sterile water and rinse all the part. Use 90%+ isopropyl alcohol and a small brush and clean every part, including the ribbon cables as well as the connector. Pay particular attention to the LCD connector. Check for any missing, burned or charred components. Once it is properly cleaned, let it dry. Then reassemble your phone, and it is possible that you have a shorted backlight circuit. So you may have to start with a new display assembly.
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VERONIKA K, as with any fluid immersion time is vital to prevent corrosion. Rice will '''not''' help you. It does not prevent corrosion and will not repair your phone. Use [http://www.ifixit.com/Device/Samsung_Galaxy_S4#guideList|these guides] to disassemble your phone. Use some sterile water and rinse all the part. Use 90%+ isopropyl alcohol and a small brush and clean every part, including the ribbon cables as well as the connector. Pay particular attention to the LCD connector. Check for any missing, burned or charred components. Once it is properly cleaned, let it dry. Then reassemble your phone, and it is possible that you have a shorted backlight circuit. If you are handy with a multimeter, we can give you some testing points where you could check the voltage to see if you have power to the LCD. So you may have to start with a new display assembly.
VERONIKA K, as with any fluid immersion time is vital to prevent corrosion. Rice will '''not''' help you. It does not prevent corrosion and will not repair your phone. Use [http://www.ifixit.com/Device/Samsung_Galaxy_S4#guideList|these guides] to disassemble your phone. Use some sterile water and rinse all the part. Use 90%+ isopropyl alcohol and a small brush and clean every part, including the ribbon cables as well as the connector. Pay particular attention to the LCD connector. Check for any missing, burned or charred components. Once it is properly cleaned, let it dry. Then reassemble your phone, and it is possible that you have a shorted backlight circuit. So you may have to start with a new display assembly.