Healthy roots but dying leaf/stem on a Phal?

[WillisWill]

This past summer I purchased a nice phal in spike from a nursery; it ended up blooming quite well. I kept it in a east facing window, watered when the top of the sphag was dry, and gave it 1 oz/1 gallon repotme's MSU fertilizer every two weeks

After the flowers were done, the top leaf turned yellow over the course of a week or two and ended up dropping off. I repotted the plant, and the roots were as healthy and vigorous as any phal I've ever repotted. The stem beneath the top leaf appears dried over and dead. The plant has been in this state for 2 months or so, and has shown no sign of putting out a new leaf. Except for the first leaf, no other leaf shows any sign of distress.

Is this plant a goner, or is there anything I can/should do for it?

Thanks