Camera stopped working last week

I have a Netvue sentry 3 about 6 months old
Last week day time is pure white. Still sound but no picture.
In the night is very fuzzy and difficult to make anything out ?
Ive checked the lens nothing seems wrong
Any ideas ?.

Hi, Friend,
Sorry for the inconvenience brought.
Could you please try to unplug and plug in the camera back again if it works?
We will replace the camera for you if it can not be fixed.