I have an avic f90bt . when it powers up there is a black screen for about 10 seconds or so then it shuts down but the fan runs still.

I bought it from a so called "friend" and i dont have the backup files for it. If anyone can help, it would save what sanity i have left because

i drive a lot and with no music, I have already ran out of things to talk to myself about. LOL.