red streaks on monitor after upgrade to 4.2

Seeing red streaks across monitor. They look like refresh collisions since upgrading to 4.2. Tried two monitors and cables same problem.

Could you attached the picture here for better understand.
Also does it the a 4K monitor?

It turned out to be another computer too close to the hdmi cable. Its a long one so it will reach the rover sitting on the floor. I need to clean up my lab :)