The ones I had that had the same issue were either the battery or the charging port. Both are relatively inexpensive on Amazon and come with the necessary tools. Make sure that you are purchasing the parts for the correct model as they can differ slightly.
Do a Google search on how to do the repairs. If you have the patience and fine motor skills it’s really not too difficult.
If you know me in real life I can do it for you.
A Gutten Moed and Good luck.
Avi