Hubby, HK and I took my phone apart yesterday and when we put it back together I found the LCD was busted! So after that, HK took it apart again and put the replacement LCD in and it was working. And after all that I forgot to mention, it was the touch screen which was broken initially, NOT the LCD!!!!
I should have realised that. if the LCD was broken I'd have a rainbow swirly screen. /smacks head
Anyway, there were some good instructional videos on the HTC website which showed us how to take the phone apart. It was very useful. I'll link them here in case I ever have to do them again.