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.