CX-5 2016 - Infotainment screen Blacked Out! Test Screen Help

[DBATCX5]

Hi everybody!!

Why im posting:
I think i ****ed up something, taking the blame and have an issue I hope charitable souls will help me with.

Problem now:
Screen is black, no nothing at car start, no rear-view camera for example.

Why i did what i did below:
Suddenly yesterday, the gps started to not show my position (first time did that since ownership in 2016). I heard it might be gps antenna connector corrosion over time and in salty conditions. Before fiddling with the connection...I was advised to ''reset factory settings''.

What I did to get the black screen, now i need help

:
After no success with reseting factory settings, I wanted to reestablish the speed restriction setting to be able to use the screen at all speeds, maybe expecting this would force the GPS to work again.

So I did the button combo Music, Mute, Favorite to access the Test Screen...Then:
1/3 ) Did Del 20 sec., then 11 & Enter...

2/3 ) I pressed by accident the Reset Map maybe thinking it was related to the GPS map...

3/3 ) Then screen seems to lost signal and went...

Now it stays black all the time, what should I do guys and girls?

Things I have tried so far:
Combo of reset buttons Back+Nav+Mute = did nothing
Prey = did nothing
Swear = did nothing

Things I have not tried so far:
Unplugging the battery (would that help for sure?)
Talk with Mazda dealer (since Test Screen)

A BIG THANKS in advance for any advice.

DanBat

 

[DBATCX5]

Problem of black screen solved by using the trick in this video; -> Mazda 3 CMU BLACK screen problem fix (reaching blindly the menu that contains the reset factory settings option). Now, the only thing left is the GPS data.