LEAR25 FLT CREW FAILED TO PROPERLY NAVIGATE THE SID AND THE CAPT DISCOVERED THAT THE NAV RADIOS WERE OFF.

Narrative

FLYING WITH NEW FO; VERY LOW TIME; 1ST TRIP OUT OF TRAINING. BRIEFED THE SID; STARTED ENGS; AND CALLED FOR BEFORE TAXI CHKLIST. I THOUGHT HE HAD TURNED ON ALL THE RADIOS ON HIS SIDE OF THE COCKPIT PANEL AND DID NOT VERIFY SWITCH POS. NO LIGHTS TO INDICATE RADIO STATUS ON/OFF AND NO MARKINGS ON KNOB TO VISUALLY VERIFY -- THE ONLY WAY TO CHK IS TO PHYSICALLY ROTATE THE KNOB. THE NAV RADIOS HAD NOT BEEN TURNED ON; NOR HAD COM #2. PROPER RADIO WAS TUNED BUT; AFTER TKOF; NO NAV OR DME INFO WAS DISPLAYING. I WAS TRYING TO FLY AND TRYING TO FIGURE OUT WHAT WAS WRONG; AS THE FO DIDN'T KNOW WHAT TO DO AND WASN'T HELPING. NOT KNOWING WHAT WAS WRONG BUT KNOWING THE VOR WAS CLOSE AND REQUIRED A TURN; I INITIATED THE TURN L PER THE SID. ATC SOON ASKED 'HOW ARE YOU NAVING?' I RESPONDED WE WERE FLYING THE SID AND HE REPLIED 'YOU'RE NOT EVEN CLOSE; TURN 30 DEGS R.' VERY SOON THEREAFTER; I FOUND THE PROB AND TURNED ALL NAV AND COM #2 RADIOS ON. WE WERE APPROX 1 NM E OF COURSE. NO TFC CONFLICTS AROSE; NO FURTHER EVENTS ON THE SID NAV.