[Q] Xperia P doesn't turn on after installing Phantom Kernel topic

After i installed Kernel in CWM Recovery, the phone didn't want to turn on.
Phone gives few signs. Whenever i press power button, phone vibrates but screen stays off. If its connected to pc, it will show light red light for some second and won't vibrate. If it's connected to pc and i hold power button and down button, it will show green light for some seconds and i could hear some noise from pc. What should i do please help, thank you.