I just purchased a used 7500 to be a backup for my existing 7500. Couple things when I got this... when I turn on the unit, it has what looks like a gunshot on the screen (my good one does not do this)... and of course, i want to take off the old commands and redo it with my own configuration files... but when I try to download it, it just gives me an error - and doesn't work.

any thoughts????