Video noise on display

[Submarine]

Kindly help me to verify your A2 screen:

While the wallpaper is disabled and the menu style (appearance) is set to "simple", you should see the screen has the gray color background when you are at the menu root.

Did anyone of you see occasionally there is video noise appearing like few bars shifting from bottom to the top or vise versa?

It's not so abvious and sometimes you cannot notice that, seems like normal and looks like some electronic interference.

Appriciate any comments. Thanks.