Box Model PX032ANI.
Symptom: Turn off the box using the remote or allow the power-off timeout to turn off the box. Press all on - TV comes back to life with blue screen saying no signal found. Press any/all buttons on the box and the blue light blinks, but no signal on the HDMI. This is a new problem. Nothing changed in the setup. I can confirm that that the TV input is correct.
Things I tried:
I have a second, similar box that my wife uses. She reports the same problem - has to cycle the power to get a signal on her TV.
Did you ever find a solution to this? I suddenly started having the exact same issue. Only power cycle of the box fixed it. I tried rebooting the TV, replacing cables, and so forth.
Only a power cycle of the box restores the picture.