E10 starts, but then stops

by Iain
(Perth, Australia)

I have been having a problem over past week, which I cannot nail.

The dolphin will start, it will roll forward a few feet, then move back a few feet before stopping for good.

I have taken it out and checked all periferals, cleaned it, removed the filter box, waited the designated time before starting again. Again it does the same thing.


Any clues to where I should start?

Thanks

Iain