My cell phone went into the water

Hi @bruhunknown

If the technician couldn't fix it, you could try another one and see if they can, as a lot of repairers won't touch water damaged devices as they can't guarantee that it will stay fixed for long if they can get it working again.

The impurities in the water causes corrosion and provides circuit paths for the electricity which were not in the phone's operating design and could damage the components. The corrosion starts immediately and is ongoing until it is completely cleaned away.

Using rice to fix water damaged electronic devices is a myth. It doesn't work. Rice is for dinner, not repair.

If you want to try to fix it yourself, do not try to charge or to turn on your phone and then remove the battery as soon as possible from the phone to minimize any further damage.

After this, you need to dis-assemble the rest of the phone and clean all the affected parts using Isopropyl Alcohol 99%+ (available at electronics parts stores) to remove all traces of corrosion and water. If possible do not use "rubbing alcohol" as in some cases this is only 70% IPA or less, can contain additives which may leave conductive residues and is not as effective. If you do have to use it check the label to verify the amount of IPA. The higher the percentage of IPA the better

Here is a link that describes what happens. Electronics Water Damage

As always with electronics, especially surface mounted pcb be gentle when handling and especially when brushing away the corrosion. You do not want to remove any components from the board. Remove the shields that may be covering some components as the water may have got in under there. The ends of any flex cables and their connectors need to be cleaned as well

Hopefully after you have done all this the phone might possibly work correctly again. You can only try.

Here is a teardown video that may help.