Hello,
This is a way you can try if your MIO gps port is blocked or frozen:
Because as i have many freeze problem on the GPS port after a sleep mode of the device with garmin xt, igo, or amigo too, or because i have the original software disturbing the one i want to use after a kill(smart_ce.exe).
You know that all the software are differents and have there "original .exe" name as "igo8.exe", ...