If that plant lost its leaves due to crown rot, I'd imagine the chances of there being a viable growth point being slim to none. I'd personally toss it unless it had sentimental value, but others would say that where there's life there's still hope.
If you do want to try to coax new life out of it, best course of action would be to keep it warm and with high humidity.
__________________ Camille
Completely orchid obsessed and loving every minute of it....
I don't think it makes a difference if it dried or had rot, with rot there is no chance of saving it but even if it dries out I don't think there is any saving it. I have to awkwardly admit I had a phal I forgot to water for too long recently and its lost all its leaves too. There will be no saving it, crown went yellow. They do need some sort of energy supply but like camille says I will keep it around and try to save it till it completely croaks it. If it does miraculously survive I will update this post in a few months but the chances to me look in the region of 1%
Fran ----- regardless of how the orchid lost its leaves (rot etc) ...... you can still significantly boost chances of some new growing activity by providing a life support system, such as even a home made version of a humidity tub.
When this has happened with mine it’s been stem or crown rot that went undetected until leaf drop. I always try to save them as long as there are green roots, but I’ve never had one in this state recover or show any positive progress: just continued decline and eventual death. I think this happens to just about everyone sooner or later.
It's important to try and figure out what led to this so it doesn't happen again. If you go to the left yellow menu and choose Forums then Beginners, look near the top for a sticky thread The Phal abuse stops here.
__________________ May the bridges I've burned light my way.