When you flash a new Rom I like to let the phone settle for a little bit. Once you reboot from recovery just set the phone down and let it settle for a bit. Im not sure if it helps but I never had problems doing that.
I do know some roms do have trouble waking up from sleep. I think it was synergy that I used it would take a while for it to wake up after I pressed the power button. Don't think you broke it, sometimes it is the Rom you are using.