http://www.htcrepairparts.com/htc-desire-c-129_353_689.html shows you all the individual steps. I would print those out and make my own manual :-) this way you have it for the future. Good Luck
+
Okay here is the [http://www.youtube.com/watch?v=JfatoeWbMRk&NR=1|youtube] video for the complete disassembly. Hope this will give you all the information needed.
http://www.htcrepairparts.com/htc-desire-c-129_353_689.html shows you all the individual steps. I would print those out and make my own manual :-) this way you have it for the future. Good Luck