O.k then as I said this is difficult to diagnose in this context , that is without being there with tools and meters .
For example if you had told me it makes an arcing sound , the colors go fuzzy etc. that would give me something to go on with .
What I can tell you is that this is not something that is caused by settings or equipment wiring but is internal and you will need the help of a local tech. on this.
A service call will cost you somewhere around $125 so if you could possibly take it to a repair shop yourself then you would save that and many shops will give you a low cost or even free estimate if you take it there yourself and the you could take it from there .
Wish I had an easier solution for you today like some sort of reset but this is not the case I`m afraid , I know those pioneers very well and this one needs hands on approach .
By the way , the model number should be PRO-620HD , use that if you want to contact repair shops near you
If you need to find repair shops near you then look at the links below and enter your zip code ;
Or this one;
This will give you a list of repair shops in your area.
You could give a call to different shops in your area to get an idea of their rates , it pays to shop around.
If that answers your question please do not forget to rate so i get paid for my time helping you and you can use the reply button before or after rating if you have other questions or need help , thank you