Water damaged phone, turns on but screen is black

"David, Probable faulty display. Rice would have been of very little use and will not stop the corrosion that is happening in the phone. Stop charging or powering up your device until the liquid damage is addressed correctly, as you could be shorting out components inside the phone. You really should take care of the corrosion that is happening inside the phone from the water damage as that could be your problem. A tear down link for your device Link #1, disassembly guide will enable you to get inside the phone to remove the damage/corrosion caused by the liquid. Use the 2nd link as a guide/instruction on how to clean/repair the device from liquid damage. After this you will be able to power on the phone and see if further damage has to be addressed. Good luck. I hope this helped you out, if so let me know by pressing the helpful button.

Samsung Galaxy S II Teardown

Electronics Water Damage"

"Well if your puting it in rice you might aswel just boil the phone and eat it as rice does absolutely nothing.very bad idea.

The phone needa opened up and washed with ISO alcohol then dryed,then turn on if you can only hear sound then it's possible that you need a new screen"

"Hi David, before continuing reading this: Remove the battery as soon as possible and DO NOT CHARGE!

If a device is exhibiting symptoms of water damage the first step should be opening the device up to just double check that there isn't water still in it, shorting something out. (I have opened a phone up that got wet and was dried months ago, and still had water in it on the motherboard.)

1) Open it up, if water is there disconnect all power sources (including battery if possible), 2) next remove the water, (see footnote 1) this can be accomplished by drying with a hair dryer (not on high), 3: next put in a bag with some dessicants (see footnote 2) for 2-7 days, reassemble and voila!

Footnote 1: an optional but highly recommended step here is to pour 97% isopropyl alcohol in the device (but try not to pour on a screen, it can mess with adhesives) the benefit of this is the alcohol will often displace the water, meaning you now have a device that is now soaked in alcohol, still not ideal but way better because alcohol evaporates faster than water and is less corrosive)

Footnote 2: those little bags in food that say do not eat, can be purchased on amazon for cheap, for example: https://www.amazon.com/10g-Silica-Gel-De..."

Phone might need a new LCD or the connector on the board has corrosion on it.

"Open The Case Of Your Phone, Then Clean The Substances With A Thin Brush And Check If Its Now Working....

If Not, Proceed To These Steps

1.Shutdown Your Phone Let It Rest 2 Minutes.

2.Open Case

3. Remove Battery

4. Unscrew To Open The Board Processing Your Phone

5.Remove The Board

6.Reheat It With Heat Gun In 300 Degrees Celsius ( Be Careful On What You Going To Heat On Then, Kindly Revert The Steps

It Should Be Working Now.... If Not, Replacement May Be Needing

Its No Software Or Any Spy/Mal/Wares, Its Hardware

cheers, Erol

-Microsoft Community"

You have to change the display as same problem occurs in my Samsung Galaxy A70 phone and sensors are fully in operation even the touch panel in my my phone is working as i can receives the calls too but the display is dead might be due to moisture in the LCD as i tried every step and search everywhere none of them helps.