itunes error -1 stuck on itunes logo

to start, I am a phone repair store, and a customer brought mt a 5se stuck on itunes logo. its never been opened and shows no sign on moisture. the only info i have is when they tried to update it failed and got stuck on itunes logo. i havent seen error -1 on a se yet but i know on newer models its a base band issue usually. im just wondering if anyone has had this problem on a 5se and if so did you find a solution? right now im thinking its either baseband, bb pmu, or tristar.