G flex 2 h950 touchscreen not responding after waterdamage

Last week I dropped my phone in the water. The day after, I disassembled it and put it in some rice. Everything is working fine except for the touchscreen (tested it with a computer mouse). Do you guys think replacing the screen or motherboard will solve the problem? Both are relatively expensive parts so I don't want to waste money if it's not gonna fix the problem. Thanks :good:

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