FWIW, I have a couple of Cary pieces I bought used and have had good customer support convos even though the used equipment isn't covered under any warranty.
@rjsully0467 , you've had better luck than I have. Do you remember who you spoke to?
The last time I needed tech support on an amp (this would have been in the summer of '20) and I called them, I was told to email their tech support. Since they didn't reply to the email I sent them, I emailed them again, and then all they told me was basically what their shop rates for repair work was and to ship them the amp if I wanted them to work on it.