The lightning may have fried the amplifier, even though it was off, so that no signal can pass through. Get a female to female coax adapter, remove the cables from the amplifier and connect the input to the output using the adapter and see if the TVs will work then.
2013 Silverado 2500HD LTZ CC 6.6L Duramax Diesel
2023 Rockwood 2445WS
Buster, miniature Dachshund
2023: 9 trips, 48 nights in 12 states, 2 provinces, 8120 miles
2022: 3 trips, 18 nights in 4 states, 2352 miles
2019: 7 trips, 43 nights in 6 states, 5336 miles