If you've turned off the circuit breaker and then turned it on again, I'd next look at your GFI outlets. One GFI outlet, with the 'Test' and 'Reset' buttons often protect other outlets on the same circuit. If it's tripped, all the outlets on that chain are also dead.
If you have a TV that is in the driver's eyesight, it might have a 12 v solenoid that turns off power to it while the ignition is on, but that doesn't explain the other two TVs not getting power. You should check the outlets for power using a multimeter, it would be odd, but perhaps the TVs have been zapped by a power surge.
Another possibility could be that the TVs are powered by an inverter so they work without shore power or generator. If you have an inverter, check for a tripped circuit breaker on it.