So, I started experiencing this issue lately. The video coming off my Pi 4 to my TV seems to have stopped working once the Pi has been turned off and back on.
I live in an area where power fluctuations are fairly common (yes, I know I should have a UPS, working on that), so when the power gets cut off to the Pi, I restart it, but can't see any video coming off the mini HDMI port, either one. I even re-seat the cable (also have tried it on both ports) with no luck.
Seems like the only way to fix it is to re-install by re-flashing the SD card.
Any ideas??
Thanks!
V/R
Rob