Had the same happen to me on occasion, then it packed up all together and the 5 beeps.
I'm no expert but I looked at the motor and noticed the brushes were completely knackered.
All's I did was turn them around complete swap because of the arc of the leading edge would be enough to make contact and to see if it was the problem.
It was the problem and I forget to head up town and replace, b*gger me 2 months later the same thing again and her in doors told me "get up town and get some brushes" I did as I was told and it's working fine now, touch wood... (well me head) ;)
Tony Morris, July 2009
