My 2016 24 ST also had no opening in the water connection compartment. I noticed on the PDI and had the dealer put a hatch in the bottom of the compartment (Thor covered it). Thor added that to later 2016 models according to my dealer. Should be covered under warranty.
For the TV check all the coax connections are tight, particularly those on the back of the amplifier. ( If you take them off don't let them slide back into the wall..Don't ask)
U.S. Coast Guard retired- 1956-1985
2016 Siesta 24ST
1972 Moto Guzzi Eldorado