prob with my xbox 360 purple screen?

hi i would like to ask someting , a few months ago i was playing my 360 and it was great and the new day it was good then it turned purple but i could still see things, then i turned it off put it on , and it went all purple couldnt see anything , then i unplugged everything and pluged back and put it back on and then it was black with just sound, then it went to nothing at all no sound no on no nothing , ? but i didnt have a ring of death,... so is this a big prob or can i get new hook ups , i use a hdmi wire with it , and the wire works fine bc now i have it hooked up to my dvd player , the other wires the blue green red aka red white yellow dont seem to work aswell,,, whats going on , how can i fix this ?