Just a problem I ran into that others might find of interest. My new one had the old firmware so downloaded the new. Went through the procedure and was told the file was bad. I downloaded four times, tried three different sd cards and still nothing.
Contacted Le Pan and got nowhere. They did tell me the only time that message comes up is when the firmware file is missing, or the sd card is missing.
That made me wonder if the class of sd card could be a problem. Checked the one that came with the unit and it was not marked. The others I had been using were class 4. I dug around and found a class 6, went through the procedure and it worked perfectly.
Evidently a slow card can cause the message as well.