I just bought a 03 disco hse with 48,000, the radio is the harmon kardon with navigation. After the first couple of weeks of driving the radio just stopped working, when pressing the power button nothing happened, everything else is working fine, I checked the fuse and it was OK, I turned the disco back on and the radio powered up, I got the code from the dealer and it has worked fine since then (about 2 months now), just got back from the carwash yesterday and on the way home radio was working fine, stopped at home for about an hour and got back in and the radio was not working, checked the fuse again and it was OK, radio will not power on now, does anyone have an idea what might be causing this, any help would be greatly appreciated, it now has 52,000 and I have an extended dealer warranty.