After my phone was exposed to rain, initially a purple dot appeared, which then spread into blue and eventually turned black within 2 days. I handed it over to a mobile expert who first changed the display, but it didn't work. They then replaced the IC, but the issue still persists. When the display is blue, I can see something, and all the functionality works well. However, after it turns black, nothing is visible on the display. When I plug it in for charging, it vibrates, the fingerprint sensor works, and I can hear the screen unlock sounds, but the display remains blank.