How to fix an iPhone 4 black screen?

So my iPhone 4 got water damaged a few months ago and I did put it it on rice and everything and it started working again. Well on my first day of school I put it in my book bag and I had perfume in another pocket. Well some how the cap twisted off and spilt so my phone got wet and did exactly what it did last time. So I got home and put it in rice I couldn't turn it off because the screen was frozen. Well after 4 days I plugged it in and it showed the dead battery sign which meant it was working and charging. Well it turned on and it was black. But since I know my iPhone screen I managed to unlock it with a black screen. The sound works fine. I put it in rice for another day but that didn't help. What should I do? I also held down for 11 seconds and the Apple sign pops up for a second and then goes away.

Seek help

Its a hardware damage. If the screen is completely black and your phone won't turn on, it means that your phone's internal SD Card has been short fused by the water. Rice will not work, so I suggest that you go to a professional phone repairer or Geek Squad.

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