Sounds like you have no 12 VDC. If connected to shore power make sure 110 VAC breaker is on for the converter. If not connected to shore power 12 VDC comes from your battery, as stated make sure Battery Disconnect switch is in correct position (on) which will connect your battery to power distribution panel
Also
to The Forum From Western PA
Congrats on your new to you rig!! Enjoy !!
BE Safe and Happy Camping.
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2013 RAPTOR 300MP w/Rear Patio Deck NO Folding Side Ladder
2013 Silverado 3500HD LTZ CC LB 4X4 DRW
Duramax 6.6L Turbo Diesel; Allison Trans
Reese 20K; Carlisle Radial Trail RH/HD; TPMS (12 Tires)
Veteran
PSU (GO LIONS)