I saw this in another forum about LG Oled tvs, (I don't know if this relates to your issue but it's worth taking a look and playing around):
Go to settings with a long press of the gear icon
- connections
- device connections
- choose your device
- choose HDMI port
- press right on device reset
- press next, and next again
- choose the brand in the search field, press next en do the configuration.
I translated this from Dutch to English and I don't own the eclipse yet so not sure if I choose the correct words, but let me know if it helps.
Another tip, In order to hard-reboot the WebOS:
Go to General, About this TV, User Agreement. Change the agreements to outside EER off. The TV tells you that the license have been changed and needs to reboot. Now this will hard reboot the TV, withouth having to unplug the power.