Thank youThere is nothing shown in the Cat system regarding the internal wiring of the monitor panel. It is simply shown as a box with a machine wiring harness connected to it.
Having looked at the price of a replacement ($4,400 from Cat, $3,600 on eBay) and been somewhat shocked I can understand why you are keen to try to repair it...............
Cheapest I found was $1,799. https://rebuildengineparts.com/prod...r-m313c-m315c-m316c-m318c-m322c-3054c-engine/
Here's a llink to a place in Spain that says they can repair it - http://www.agrotecnocar.com/novedad...7058-06-reparacion-de-monitor-caterpillar-cat
.......and one in Holland - https://www.diagcar.nl/reparatie/caterpillar/cat-243-7058-06