Question Device not turning off?

Hi guys.

As i recently installed TwistedKat and charged my phone over night because the battery was empty i couldnt turn off the screen via power button anymore. Longpressing it still shows the menu but i cant turn off the screen at all. What was also quite amazing is that the bootscreen doesnt come up anymore, its just a black screen instead of the twistedkat logo.
Im on TwistedKat 2.6
Using the Icecode Kernel from the 28. march since i cannot download the latest version.

Any ideas what this could be?
(Wiping caches also doesnt help i tried that a few times)
Edit: the problem also happened while i was on another rom - vanir - i solved the problem by doing a fresh install but since its happening again i would love to know what causes this problem.