Do you really think the average farmer can repair a GPS guided combine?
Could you repair the technology on a high end Cadillac?
ANY repairs.
No, of course the more complex systems need a trained and qualified technician with access to specialized tools and parts.
For well over a decade farmers werre unable to fix ANYTHING on their own John Deere equipment due to restricted access to repair information, tools, and software, which often limited repairs exclusively to authorized Deere dealerships.
Furthermore Deere also warned that any attempt at repairs at other than an authorized dealership voided all warranties.
Tractors still do HAVE internal combustion engines, with equipment and accessories found on any motor vehicle.
After all, it is still just a tractor.
In 2008 my wife and I decided we simply HAD to be early HDTV adopters and we spent 1800 bucks on a 40 inch ViewSonic HDTV set.
The set came with an eighteen month warranty and almost exactly eighteen months later the set went kaput.
When we tried to get it serviced
(out of warranty of course!) we were told it HAD to be serviced at an authorized ViewSonic facility, which informed us that the specific repair parts (inverter board) were unavailable.
Thus we had an eighteen hundred dollar paperweight that could not be repaired at all.
Five years later, long after we had tossed the set, I found the exact inverter board needed to bring the set back to life on eBay, the part being sold by a former ViewSonic repair guy.
It was 38 bucks on eBay.