Hi waynehulgan,
You left out some important details - like what kind of trailer, what generator, is it gas, diesel or LP?
Since you mentioned "no sound of pump running" I'm guessing you have a toy hauler with gasoline genny.
I doubt the guy at Camping World caused the problem by starting the gen with camper plugged in. With a built-in generator, the generator prep includes a transfer switch that automatically switches power sources so that the camper is supplied by one or the other, but not both at the same time.
If you have an Onan, some models have a fuse (probably located on the front panel). If blown, the generator won't crank. Low voltage and bad connections are the other likely causes.
You should probably try starting it from the front panel of the generator to eliminate the remote as a possible cause of the problem.
Also, the generator starting power probably goes through an 12V automotive circuit breaker near the battery. If you're currently plugged into shore power, you could have a low battery and not know it because the Power Converter is supply enough 12V power to run your internal lights and other 12V systems. The generator, hydraulics, stabilizer motor take a different path and have a greater dependence on the battery being charged. It's possible that the circuit breaker between the battery and Power Converter has tripped and needs to be manually reset for the battery to charge.
Here's a link to our
12V troubleshooting guide located in the manuals section of the forum. If the battery is low, this will help you figure out why.