Brick cannot statrs boot mode
I have install robotc firmware and it works fine. I tried to reinstall nxt-g 1.03 firmware and the message 'Brick cannot statrs boot mode' appeared. I 've install the last usb drivers. I made several resets for 1 to 7 secs and tried again but nothing. I removed batteries and pressed reset too. Nothing. I tried nxt-g to install firmware but it stuck when writes "prepare NXT...". But robotc still works fine. Any ideas???