well i have a roku 3 with no hdmi display.
it did this after disconnection of the power.
i checked the hdmi cable on my second tv with another roku.
as well as the power supply.
both worked on the second unit.
i tried the reset, no joy....
i get the light on the front like it should, and the 10/100 lights are flashing like it is connected.
but the tv's both say no signal.
and yes they are on the right hdmi port..
was there an forced update that killed the unit?
what am i missing?
and yes a new roku ultra is looking good right about now!!