Chosen Solution

how i can repair it?

Well you’re going to need to take it apart, clean it with isopropyl alcohol, 90 proof. Most likely you’ll have to replace the battery. But could be something else. Won’t know til you get in there and start trouble shooting. Just use some q tips. Don’t skimp on the isopropyl alcohol. You want 90 proof. What model phone do you have, so I can find a guide for you?