The display panel is ruined by ultraviolet rays that burn the panel out. It was a known problem that Komatsu supplied a filter plate for to prevent the issue way back in the nineties. Once burned there was no repair, only replacement.
I agree with that, thus why I have been covering my switch gear with a towel. It appears this is an LCD not LED display and those are more tricky to repair as I would need to verify actual display specs for replacement, and that certainly is not a DIY type project. Those would use a solder header on the PCB. Still worth the effort on something like this IMO.