How do I fix the problem with my iphone?

my iphone crashed from it being jail broken this is my Second iphone that i've jail broken, and both have crashed however the first iphone I had I was able to have someone restore and it started working fine. As for my second one it did exactly what my first one did it was working fine when it suddenly froze and shut off. I'd try to turn it on but it would only show the apple logo ive tried restoring the one I have but no luck what should I do ?