I am a robotisist so I know about these things
do you have access to a multi metere?
cant type too well lol
what has happened is that there was a bit of a power surge when the power either went off or back on
That has caused the memory in the robot to "glitch"
but can easily be fixed in most cases
What you need to do is remove the batteries and wait 10 minutes, then replace the batteries and the charger, wait one more minute then turn the ubit on, and set the clock and re program it.
That should take care of this issue.
if not the unit will need service because of a bad prom IC that has gone bad due to the power surge as I was saying.
Its not expensive and the repair shoundnt cost you much either.
thanks will try it