Liliana

My smart TV disconnected itself form WIFI and now it will not accept the password?! I bought it a few months ago and had been very happy with it except for the horrid voice that comes on with the volume. WIFI is working fine so why does it tell me is the wrong password when it is actually correct? Thank you in advance for any help oh and if anyone can also let me know how to remove the annoying voice it will also be appreciated!