well suzie it sounds as though the heating element or t.o.c. are faulty and need replacing , have a look in fleabay for ghd spares it may give you some further ideas
keymatic, December 2011
So, your GHDs are purple 4.2, and expensive, and, they don't heat up up. So what should you do? go on, have a little guess. What do you do when something is broken, thats it, you throw it away and buy a new one, simples!