My phone is slept down in watch and not started

@devendraso79171 the very first this you want to do is to STOP to charge, sync or otherwise use your phone. This potentially can make a bad situation worse.This may further damage your phone.

The next thing to do is to clean it. Disassemble your phone using something like this video. You must remove all EMI shields of the mainboard. After you remove those, clean the whole board, connectors and all with +90% isopropyl alcohol. Follow this guide, even so it was written for an Apple iPhone all the points are still pertinent to your phone as well. While you clean your board, check for any obvious damage, like burned or missing components etc. After it is properly cleaned, replace the battery. All these steps are to avoid delayed failure caused by corrosion. Best thing to do would be to clean it with an ultrasonic cleaner, but if you do not have access to one, this will at least help. Once all this is done, reassemble your phone and reevaluate. Until it is cleaned, everything will only be a guess. Even with all this, water damage has only a small chance to be fully repaired, but at least you can give it a try.

If during the cleaning, you should come across issues on your boards that you may have questions about, You can always post images of what you see etc, with your QUESTION. That way we can see what you see. iFixitでの質問に画像を追加する方法

While you work on your phone, take lots of pictures. Once you are done with it, take those pictures and create a guide for iFixit. That will help the next person that has the same problem as you do. It's easy and fun to create these guides. https://ifixit.com/Guide/new The iFixit community will appreciate this.