What Dave said is essentially correct. 1. Make sure the tank has gas in it. Shake it, and if you feel liquid sloshing around, you have fuel.
2. Check the solenoid. Have someone flip the switch inside while you're at the solenoid. It should make a distinct clip and get warm. 3. Check the stove and when trying to light it, you should hear the distinct should of air/gas coming out of the burner(s). Note that depending on the street, you may have to hold the knob in or do something else to override the safety to start the burner. Once it is started, there should be a thermocouple that heats up to allow the flame to keep burning. If you hear gas/air, you may have to keep at trying to start the unit for a minute or two to purge the air out of the system. If you're getting the hissing sound, it's probably not the regulator. 4. If the solenoid clicks, but you're not getting gas, its probably the regulator. They're easy to get online or at a RV store. 5. Once you have it working, use the pressure gauge to check for system leaks. Leave the solenoid on and pressurize the system. Turn off the tank valve. The system should stay at the same pressure for 5 to 10 minutes. If not, you have a leak somewhere you need to find. Good luck! Bruce Whitmore 1994 C&C 37/40+ "Astralis" Madeira Beach, FL (847) 404-5092