Help needed - ignition problems after instrument cluster work

Hey All - I took my instrument cluster out this weekend to replace the step down transformer, in the hope of getting the fuel, voltmeter and engine temp gauges firing again. I replaced the old transformer with a solid state one (but didn’t replace the little technical paper underneath it). When everything was back in, she fired up, we had power and ignition - bingo. BUT! 2nd time, we just have power and on turning the ignition I hear a low volume click on the radio speakers but get no ignition. Any ideas of the problem - is my daily driver and need to make a quick call on what to do or how to brief a mechanic.