On Odin, you will need to follow a few steps

RED:: Make sure your device is plugged in, and acknowledged by ODIN. It will Register as a COM Port. Once you see it displayed there, move forward

GREEN:: Load The AP file. This is your basic Firmware. (Device OS, Carrier Bloat ware, and other basic files) Unless you have other knowledge of this program, please do not load anything besides the AP. This file is located where you extracted your FIRMWARE downloaded from Sammobile.

PURPLE:: Verify That device is loaded. (Do not do anything until it says that the AP was Successfully loaded) It will inform you its ready for installation.

BLUE: Hit start. this will begin the Loading of the software. It will show you a progress bar at the top of the screen in the large box. It will come back as PASS, or FAIL. if it has failed, either you have downloaded the wrong software, or the device has a board level issue.