Default [Q] runny kitkat stuck on splashscreen

Hello gents pls help out a noob.
I think i may have rushed into flashing a rom on my xl before i knew enough to try it.
Unlocked at htcdev ok and flashed clockwork recovery
Downloaded runny kitkat and flashed. all seemed to be ok on install, device rebooted and got cyanogen splashscreen ......for several hours.
pulled battery as i didnt want a flat battery.
booted into recovery and removed kitkat and tried kingcobra v9 again seemed to install ok untill reboot then just a black screen.
Any advice on how to get a working phone again would be helpful.

is it an s-off problem, how can i get s-off with no working rom installed.
Is it a root problem, again how to do with no working rom.