Honor 7A battery stuck 100% and charged

Hello, i have Honor 7A for repair with stuck battery at 100% and charged(when i remove the charger or plug in does not change only led lights up and off but the battery not charging). I tried with new battery but no result. Tried to disconnect the charging port but no result. Tried to hard reset but no result.

Anyone can you help me to fix this problem ?

Thank you.