Hi, I got up this morning and am having exactly the same problem as the guy above.
I have a foxsat 500GB HDR plugged directly into a HDMI socket (1 of 3) on my Toshiba Regza 42ZV555D tv.
I am almost positive thats the model of my tv anyway. I've had it since 2009 and no problems at all.
Anyway, ive had the humax box since april and there has been no issues like this until today.
It was working yesterday morning then today i turned it on and it booted up and worked fine until about 5 seconds in when the screen went green.
The sound and picture stopped. If i change the channel i get the sound from that channel but no picture. This does not change when you click menu or anything.
I shut down the box and booted it back up and exactly the same thing happens again.
It was before i left for work so i just tried that a few times quickly and unplugged/replugged the hdmi, which made no difference.
Just from a search on google i see this is a well known issue there just seems to be no solid answers on my exact circumstance.
This guy seemed to have the same issue close enough so thought id check how his was going or if anyone has any helpful knowledge please?
I'll have a fiddle about when im at home tonight.
Change sockets, change hdmi, unplug from the wall, attempt factory reset of the box if needed (which i dont know how to do without viewing the menu).
Any help would be appreciated please.