Screen won't turn on after replacement
After I fixed my iPhone 6 about a month ago from water damage it suffered around 2 years ago, I bought a replacement screen(some cheap one on eBay, more on that later) because my phones original screen got a little orange mark on it on the inside of the screen. After using this screen for less than a month, it starts going weird. I start seeing green dotted lines while I was at school today, and thought "No big deal, I'll just check on the connectors when I get home." This is where the problems start happening. After checking the connectors and seeing the screen works fine(still the cheap replacement one), I go and start to close my phone. When it wouldn't close, I realized there was still a screw just rolling around in the phone, and it had put a dent in the loud speaker. This also resulted in a black line going across the bottom part of the screen. This black line was MUCH worse than the small orange mark on my OEM screen, so I just switched the screens. After I plug in the connectors of the OEM screen, the screen wouldn't turn on. It is recognized by iTunes and it does make a sound when I plug it in to charge. After trying the replacement eBay screen, that didn't work either. So, where did I go wrong? Did that cheap eBay screen permanently ruin my logic board's LCD connectors, or do I just need a new screen replacement? If so, can someone link me to a reliable screen, one that can last a while(under $40). Thanks!
TL;DR: Phone screen didn't turn on after replacing screen.