Have a Dell 7130cdn which worked fine for about two years.
A few months ago it started locking up. That is, you'd power the printer up. It would run for a few minutes and then it would become unresponsive.
In fact, it would not shutoff when the Power Switch was turned off. You had to pull the plug.
Have not seen many (make that ANY) postings on the 7130cdn, but if you have some input, it would be appreciated.