Hi, I am new to the forum, and I am looking for advice on how to go about changing the motor on my Dyson DC27 which is just over 5 years old. On powering up the motor makes humming noise for a second or two and goes silent. I am assuming the thermal cut out is operating. The brush arm is freely rotating so I am guessing the motor is burnt out , or requiring new carbon brushes. I would appreciate any advice on how to access and replace the motor. Thank You, Jackieg, Motherwell, Scotland