Root desire hd

[p3p69]

hi guys i was reinstalling jelly bean and the process went way too fast and now its stuck on a X screen when i boot to the bootloader screen it only stays on for a second then goes black if i hit the volume keys it scrolls thru the options but goes black as soon as you let off the volume key.when you hit power to chose any option it vibrates one time and reboots back to the X screen again any help would be appriciated thanks ...phone is a htc desire hd