Problems after screen change

[stix145]

I have an iPhone 4S (CDMA). After replacing the screen and LCD such features as the side volume controls, vibrate switch, proximity sensor, ear phone jack, speaker phone sound and video sound have stopped working. I double checked to see that all of the connectors were pushed on correctly and they were. Is there a possible grounding issue or piece of the hardware that I may have damaged that controls all of these functions (i.e. logic board)? I tried cleaning the hole next to the ear phone jack it still does not work, will be trying the proximity fix soon. Any help or insight is appreciated. Thank you.