This is what’s known as a Master 4 module in a LHM550 Liebherr harbour crane.
Earlier this week it was hit by lightning causing the module to output a combined 8 volts out on the can line 3 circuit.
The rest of the module works fine, all functions work except anything related to can line 3.
Can line 3 output is the 2nd white plug port on the top left of the photo.
I know it’s probably a long shot but does anyone have any familiarity with these kinds of things?
I have added a couple more photos in the comments.
I couldn’t visually see any sort of obvious fail point.
Unfortunately they need to be separated due to the logic and control system.
Can line 3 is independent of the rest of the machine to allow recovery when it fails.
If it’s linked with the rest ordinarily and something like this happens then it would be dead with no simple way to recover it
You’re not wrong about lightning though as a crane technician i see lightning strikes far to often and it’s always expensive and time consuming