Trying to restore iPhone on iTunes

I've been having a lot of issues with my iPhone 6 Plus. Started with the screen flashing white, then disabling the screen. It also kept restarting. When I would get it to come on, the initial passcode screen, I would put in my passcode and the phone would freeze and restart. Now, when I connect my phone to iTunes, it gives me the option to restore and update. The process starts, then after a while it gives me a error code. (theres been several, 2009, 4005, 4009 etc.) I've updated itunes and my computer, and I deleted iTunes and redownloaded it. Same problem. Also have tried switching cords, USB ports. Any suggestions?