I'm new here

A few days ago my tv screen started to behave strange. Is like an old CRT monitor with a low refresh rate (this behavior is not permanent 'yet'... but it occurs from time to time).
Now, I did some research and found this video https://www.youtube.com/watch?v=i-jQZ-TQdgU#t=45 (I've copied the link with the exact time where you can see the behavior). I was looking for wiring diagram just to see if this model (UE32D5000) has the same circuits (at least in the power block section) as the tv in the example (UN46D6420) but I couldn't find any.
I didn't try a master reset yet but since I didn't do any special configs I don't know if that will help at all.
You guys have any ideas or advices?
Thanks for your time and have a nice day!
