Question [Q] Can I still save it?

Hi people,

I got the Windows Phone 8S from my brother. He said that it no longer works, Whenever I start it up and the boot screen is ready always comes a black screen with gear wheels

I do not come in the bootloader or any where else.

has anyone an idea how I can fix the problem?
Samsung Gallaxy S4 | Stock ROM | Android 4.3