I just saw a similar issue with a x493. It wouldn't play USB or CD's, and continually flashed reading. AM/FM was fine. Pressing the reset button on the radio, fixed the issues. Worth a try, if you haven't already.
and you might want to check your ipod cable itself. i use the same deck, and have had it happen a couple of times, it was always the cord. the stock ones may be fine in the house, but i find they dont last very long in the car
The next generation of processing, the ZAPCO new DSP-Z16 HDR (16 ch.) and DSP-Z12 HDR (12 ch.). HD means these are not just DSPs but HD audio players as well. Zapco HDR processors go beyond today's normal 24bit, 96Khz high resolution standard. The HD player in the Zapco SHDR...