My daughters have exactly the same fault. I have taken them to bits to find that it needs a new power lead, which is a sealed unit. Jamella refuse to supply one. I have found someone on ebay who will repair them for £17.99. Sending them away for repair tomorrow. He will fit a new lead but it will not swivel. If you go to ebay uk and type in 'GHD repair' in the search bar you should find it from there.
I will let you know how I get on.
Roy
June 2007