Problem with BLUE ELF 2

[Velho Barras]

I've bought a Blue Elf 2 (2009) v 2.0 some years ago and it never worked properly, always had image noise. So I set it aside and been using a 60 in 1 vertical game board that works perfectly. But now with this pandemic, I finnaly have time to sort this thing out. The thing is I don't have a clue on what I should do. Please look at the picture in attachment. Can anybody help me please?
Thanks!!!

Greetings from Portugal!!!

[the end melody]

Hi Velho Barras, welcome to the forums.
You've come to the right place for help.
My guess is, assuming that the Blue Elf unit is working properly, a malfunctioning power supply and voltage problem.
My second guess would be a harness problem of some sort.
I'm sure there are much more knowledgeable members that can help point you the right direction.

[Velho Barras]

Thanks mate!!!

The unit is functioning, it's playable, but besides that image noise I reported, I don't have the joystick "up" control. Probably a pin out problem on the harness.
Hope someone here can shed a light on this problem.
Big thanks to all the community for all the availiable info, hope to get some answers here.