Cadillac cue infotainment Center screen is black

Hi there! I was told that the entire infotainment system needed to be replaced upon noticing that the infotainment cue system is completely black and the radio controls and DVD player are not currently working. I purchased the screen only and did the replacement myself... Only to find that the screen is still black… are there any other options for me to do it myself or do I just need to break down and take it to the dealer?