screen replacement now won't connect to PC

Hi

could someone please help me, I have done a screen replacement for the iPhone 6 put it back together, but phone blocked (was told got blocked as the screen is not genuine apple one) and needed to connect to iTunes I plug in and it loads but does not show on computer I have tried different cables and computers but nothing I hear it loud but not show, I thought could be charged port but the phone charges just not load to PC/laptop