Possible solution to screen flicker when going back to an app topic

Hey Guys,

so I'm on my 3rd nook HD+ and all 3 had some sort of flicker when i open an app that's already running (CM10.2 and CM11). I've been tinkering with the Nova options and as soon as I switched the opening app from stock to slider (I believe it's on nova prime only) there were no more flickers to be seen. I'll post a video sometimes this afternoon.

Black flicker, no kernel logo & rom logo topic

Hi!
Sorry my bad english.

My X8 rooted, bootloadered
I used a lot of ROMs and Kernels, but i had screen cut and black screen, but the touch screen worked because the phone vibrated, when dissolved in.
Since I restarted my phone, the phone just blinks but no picture no sound.
Display is certainly good, because I changed, but it had no pictures.
What could be wrong with the hardware or software? Fixable?

Thank you in advance for your response.

Best Regards,
Lacc86