Wait

Edited 16 March16 Mar by Cairus

You have PM

For anyone stumbling across this issue, here is a FIX:

The problem was one of the cables not being connected properly (on the inside of the unit or display)

First I recommend unplugging all of the connections and cleaning them properly without taking the unit and display apart use a small brush and IPA or some sort of contact cleaner

If it's the same after connection you have to take apart the unit and display.

On the display and the unit, there are screws which you need to unscrew (photo of the approximate locations)

on the unit, there are 4 visible, and one under the warranty sticker

After the screws are out, you can clean the inside of the unit, mainly the inner side of the back connectors

the display needs these hooks to be unhooked (photo)

I used 4 plastic pry tools - first unhook the bottom or the upper half - then sides

- then it starts to lift and you can unhook the other half

Then you can lift it up and clean the inside of the display (mainly all of the connectors that are on the inside)

If all of this won't work, you have to check the continuity between the outer and inner connectors and your whole cable line.

Thanks @Cairus for helping me and guiding me.

Edited 23 March23 Mar by vvojta