Hi, I am new to the forum and not really sure of the protocols so forgive me if this is not the place to ask for help.
I have just recently replaced the Columbus head unit with a refurbed unit as mine just stopped working one day (screen was blank feedback through speakers and constantly trying to load a cd). I have fitted the new unit but when I get out of the car I still get sometimes not all the time feedback through the speakers and sounds like it is trying to load a cd, when it is at this stage it never turns off so I have to remove the fuse. When it is ok I get a faint humming through the speakers and it powers down after 10 minutes. Has any body had this before and or know of any fixes or what could be wrong.
Peter