Hi, go to www.sparesaver.com and look at their 'Help & Support' section. They have superb full instructions including colour photographs of troubleshooting Dyson problems.
Jack
January 2008
Look where the cable enters the machine - you can see where the plastic moulding covers the switch area. There is usually one (torx) screw holding this cover in place. Undo it, take the plastic bit off and the connections will be seen.
howtomendit.com for free repair help, information and advice.
Try fixfault.com to fix vacuum cleaners.