Digital display garbled 2

Machine: k40

Firmware: I have a new board and I’m using the latest firmware (or i hope so)
Problem/ Question: My lcd sometimes look like this :

I’ve seen the other thread where someone got the same problem but this topic is closed and there was no proper answer. I can’t see myself wrapping my ribbon in aluminium foil inside all that electronic (that looks more a chinese solution to fix a problem). could someone help me find a solution please?