Before looking for the complicated answers lets ask the obvious question.
How are you powering the circuit?
Have you checked the power supply voltage when this fault occours to see if your supply is overloading or near overload?
When fault finding always start with the basics.
Also, since you are dropboxing could you put a video of the display flicker there so we may see it.
A picture speaks a thousand words, a video (i dont know) but its better.
By the way thats a lot of wires/antennas to have in a box with hight AC voltage.
Daz