Linsn card with flickering problem

[nonkeldw]

Hi
I'm busy with reverse engineering of a LISN card, RV905H.
I use the card in standalone mode without any connection to a "server", when I push the button the LEDWALL steps to predefined patterns, this works!
But sometimes there is a white flickering noise... I measured already the power rails this rails looks good and stable.
When measuring the CLK (this CLK is generated by the FPGA and go through all the LED panels.)
I found some strangs signals... See picture below.

Have any of you suggestions how to future investigate this problem?

[StillTrying]

A silly question would be have you got the scope probe on X10.

[nonkeldw]

Yes, it's standard for me