I agree with Edward, that sounds like it could be a connector issue. First off, you can buy specifically-made adhesive strips for your battery [product|IF428-002|here|new_window=true], and replacement display adhesive [product|IF428-004|here|new_window=true]. And if that doesn't work, I recommend that you try [guide|128034|replacing the battery|new_window=true] yourself. You can get a replacement [product|IF428-001|here|new_window=true].