Hello, My name is XXXXX XXXXX I will be glad to assist you.
I'm sorry to hear about the problems you're having with your TV.
When there is a storm, surge or lightning strike, the HDMI board is usually the first thing to fail. It is a sensitive connection and carries 5 volts of bus power down the cable which can easily get damaged by the surge.
What you can try is a reset by unplugging both the Cable Box and TV from power for 15 minutes. During this time unplug and replug the HDMI cable. Then plug both units in. Power up the Cable box first, then wait 60 seconds and turn on the TV.
Do you get HDMI signal this way?
If not, then the HDMI connection on either the Cable Box or TV is faulty and needs to be replaced. Do you have another device you can connect to the TV via HDMI to test it?