I've been using Dictation in TextEdit for several months now. Yesterday, out of the blue, it stopped working. The microphone icon appears and it responds to my voice, but no text appears. I've been using it with "Use Enhanced Dictation". I tried unchecking and checking again,turning Dictation On/Off, and switching languages (English (United States) and English (United Kingdom)) but this did not help. What is wrong?
I know you said you already tried restarting, but here are some specific steps, in a specific order, for you to try.
Try turning off dictation.
Restart your computer.
Then turning dictation back on.
Let us know if that helped.