ecopenhaver:
I found another Mega2560 laying around and tried hooking that one up. It works just fine! Does this indicate that there is something wrong with the bootloader other board?
That or could be the USB serial converter chip. Next step is to run the loop-back test to see if the USB serial converter functions or not. There is a sticky around here somewhere on how to perform the test. If it passes then re-burning the bootloader on the 2560 chip would be the next step.
Lefty