Re: frozen rv
Since you have explored the fuses and replaced the battery, I would remove the monitor panel and make sure that no wires were disconnected.
I would check the fuses with a meter.
Although you have a new battery, is it fully charged?
Check it with a meter, it should have about 12.6 volts.
If the battery has been in for a week or so and you are not plugged into shore power it will have parasitic draw from a few things, and could be dead now.
Come back and let us know what you find.
Peace
Dave