Phone won't power on after screen replaced

I have replaced the screen and battery in my iPhone 5c and the device will not power on I have tried to hard reset the device leaving it to charge and still nothing before I replaced the screen and battery in the phone. it worked great until idroped the device and the touch screen stopped workings of I replaced the screen I left it in my draw for about a week and after that the device will not power o and device will not power on so I replaced the battery and the device will not power on at all