I have a 55 inch Samsung 7000 series LCD in my office that is approx 2 years old
Over the weekend there was a major power failure: when I powered the display on this morning, no HDMI input worked: the component video input still works
I tried all 4 HDMI inputs: I know the sources work
How to troubleshoot the HDMI (from the service manual for a 2010 'C' model 7000 series.
Alternatively, you can replace the Main board.
Thanks for the info: that is what I thought
also noticed the Ethernet connection is dead : and when I power it up on an HDMI input the panel resets itself
The panel is 3 years old and came with a one year warranty so I will use the component video input for a while until I decide what to do: I don't think I want to put any money in it for repairs...
You're very welcome.
Repair at the component level is a PITA and requires specialized skills/equipment and component availability.
A replacement main board for your set, from the usual sources, would run around $100 and very much a DIY project.
There is also also the remote possibility, that the power failure corrupted the eProm firmware or a setting.
However, I never recommend entering the service menu, unless you have the procedures/settings in the service manual on hand.
Note: broken HDMI, Ethernet and eProm firmware, all point to the main board.