console controls erratic while programming

hi all,
thanks for any ideas you can suggest...

4 month old hog4, latest OS:
saved shows will execute without problems, but while programming various controls will freeze. could be the external touch screen input, could be the keypad, could be wheels...

anyone else had these problems?

drivers? firmware? port faults?
could it be related to power faults in light groups?

any ideas of where to look would be appreciated

thank you!