Note 4 crash issues

[Traumatism]

I've had my note 4 for a while now on Omega ROM (Emotion Kernel) and never had any issues until now.

It started lagging first and then crashed completely. I've tried formatting completely (internal SD, Data, System, and both Caches however it hasn't fixed the problem with random crashes or inability to turn on from time to time.

When it crashes it vibrates and the screen goes black after a slither of light flashes in the screen.

Any one have any ideas or fixes?

 

[Traumatism]

Quick bump and also quick update to say I've tried removing the ext sd card and still same issue so I know it's not related to that.

I really could do with some help on this. The only thing I can think of trying is a full reflash from scratch and going from there.