This problem has only recently started happening, and as far as I can tell, nothing has changed in the environment.
The TV was configured for DHCP, and was working fine. A week ago when I tried to watch HULU it said the internet connection wasn't working. When I checked the IP address it had reverted to APIPA link-local 169.254.x.x. I was able to reset the TV by unplugging it (power off/on did not work) and it reconnected with its old IP address (assigned by the DHCP server) and worked OK. Next day, same problem, same solution.
After the third time I changed the DHCP server to give it a fixed address not in the DHCP pool, and this worked for a few days. But then it failed again, with the same problem (169.254.x.x).
I have run my own Linux firewall/router/DHCP server for years and was able to check the DHCP server logs. When I cycle power on the TV it goes through the DHCP Discover/Offer/Request/Ack sequence and operates normally. When the DHCP server was configured to serve a dynamic address, the lease expiration was 1 year but the TV would go back to link-local after about a day. With the DHCP server configured for a static assignment, the same behavior is observed (Discover/Offer/Request/Ack) and again, after some time the TV reverts to link-local IP address.
I've tried updating firmware but it says I have the latest firmware.
Suggestions on how to troublshoot this further?
