Chosen Solution
I recently received an iPhone 6 Plus, with a cracked screen. The original screen did not work, but when connected to a computer, the phone would go into a bootloop, from the apple logo, to charging logo, then off I believe. I tried to replace the screen, however I mixed up with connecting the wires to the board. The screen cable was then useless, but the phone itself I have no idea what could be the problem. I think I damages one of the pins on the board. Would this mean I would have to replace the board entirely?
What you describe does not sound like boot looping. As Andre W. says, it could be a bad battery.If you have access to a multimeter, check the voltage coming out of the battery. It should be around 3.7V - 4.2V. As for the connector and broken pins, please post pictures as @oldturkey03 suggests. FPC connectors can be replaced without necessitating a logic board replacement. For that, however, you will need a repair shop that does micro-soldering repairs.
W A V E UltraTM if it is a pin that is bend or broken on one of the connectors, you can try and find someone that does microsoldering and will replace the connector for you. Right now @refectio would be the person I’d contact first about this. It should be cheaper than replacing the logicboard. Post some images of your damaged connector with your question. That way we can see what you see. Use this guide for that.
Sounds like a bad battery to me! If it keeps boot looping its sensing the iphone is there but if it’s not reading a functional battery then it wont boot.
