Hello hello, I wonder if anyone can offer any advice please
I have had my Rio Car for over a year and it's very well used and has been in several cars. I have just installed it another and noticed the left rear line out has no output. Then I noticed the line out wiring insulation is damaged so presumably it has been making short circuit to the un-insulated earth for quite some time.

Can anyone advise if it's something I can tackle myself? I am a mechanic with some experience of handling electronic things but none of actually repairing them

Is it as simple as a fuse inside that blows?
If not, can anyone recommend anywhere in the UK to repair my beloved machine?

Very many thanks

Fergus