I will try and re-seat the chip this evening and report back tomorrow.

Did it work for you?

Sorry it took so long to get back...took me a while to get around to testing - all other ports work except for D0. I tested with servos and other devices as well....nothing! I checked my cable with a meter...scoped everything, etc.

Unfortunately that is the one that I need to control my Roomba base for my bot.

I was hoping that I could get the EZ-Robot team to send me a new chip...but they asked me to send the entire board back...not sure how long that will take.

But that is where I am at right now, so no, it did not work. Thanks, Wayne