Oddly enough, we’ve seen these tractors have all kinds of electrical problems. Due to these problems, things like the PTO do not engage at all. This also directly affects the operation of the tractor. However, all of these problems may simply be due to a faulty drive.
This could be more likely if you are facing multiple problems at the same time. If this is the case, then your best bet would be to get the tractor replaced. Although you can still repair it, there is no guarantee that problems will not reappear.