logo stuck

Hi guys, Been a samsung user since S2, unfortunately ive made people bring me their devices so i can polish them, if not fix. I got an i9505 at the moment with a very strange issues: It boots up, hangs on the boot logo. It boots in Download Mode, but volume up button wont work, i've opened...

first, excuse me for the english. ok, i installed the cyanogenmod and then i wiped the memory and the cash because i wanted to give the defy to other person. so i installed the cyanogenmod from the card - the stable version or something similar - and that was all. the phone get stuck on the...