Phone left out in rain now doesn't work

I appreciate your response and the water damage link, but they talk about an iPhone water damage. Mine is a home phone. It's the single unit phone, not the mother unit

@sandra It will still work the same.

Yes it is a different phone but the main principals of diagnosing water damage are the same. Water damage is always different depending on the situation like how long it was exposed and such. If I were attempting the repair, I would disassemble and clean it first and see if that does anything. Then it comes down to the inspection. Look for the corrosion spots before you clean and that will show you what components might be ruined. If there are blackened or corroded places by the battery these are probably at fault. Try reflowing the joints on the questionable spots and removing any shorted components. If at any point you get some sort of sign of life out of the phone try to figure out what is working and what still needs fixed and work on those areas.

Hope this helps and wasn't too trivial or complex.

how do you disassemble the phone. I removed the battery. What else should I do?

Here is a guide for the phone model this was posted under Uniden Dect 6.0 Display Replacement . If its a different phone look for screws on the front and back also under the battery cover and under rubber feet if it has any. Remove all the screws you can find and start gently prying at the seams in the plastic. Hopefully they will separate easily, if not there might be plastic clips holding it together. In that case it will take a little more force and probably a twisting motion when prying. The main thing when taking apart electronics is to go slow and not use excessive force. If it still wont come apart try googling the specific model of phone and see if anyone has any pictures of it disassembled to give you more clues of how it comes apart. Good luck.