iPhone 4s will not power on...

OK, so its been a while since i used my iphone 4s. its been in parts for about a year and I just recently bought all new hardware for it. The hardware I replaced goes as follows:

Proximity sensor

Home Button cable

Charger port

Battery

LCD Screen

I pretty much replaced everything in relation to power. I kept it on the charger for about atleast an hour. At most, the IC's under the camera warms up, but no other responses. The computer doesn't even read it, which is how i know it has not powered on. There was no water damage because i strictly took it apart to replace the exterior, but just got lazy. I also tried researching the schematics, perhaps I can try to find out where the flow of electricity stops, but its really hard to find. Looking for suggestions...