Motor problems

[dannyboy10]

Hi, I'm having some problems with me motor, it's a dark motor with a 1m dish. It's been working fine with no probs until yesterday. I was watching a channel for about 5,10 mins then the dish would move on its own, I went outside to look at dish and it seemed it was going through all sat positions stoping at each I have programmed in.this happened 3 times then it would after a while come back to the channel I had on, on the first time this happened I unplugged everything and reset motor but to no good.. This morning it happened again. I've tried using diff box on this dish but that don't work.. At the mo it is working fine but is there a problem with motor ? It is like some one is moving the dish lol.. Any help would be great thanks.

Thanks