I dropped my iPhone replaced the screen still doesnt work

The most likely cause is damage to the motherboard. The fact that a new display has the same issue as your old display makes it almost 100% certain. Replacing the display was a very good, logical first step. You eliminated that as a possible fault. Now you know that its a problem after the display, which is basically the logic board. The problem is that logic board repair takes special tools and skills. You have to ask yourself if its really worth paying something over $100 or buying hundreds of dollars in tools to fix.