I have an Imac 233Mhz Rev A. motherboard populated with CPU and Ram (all tested working) and a power supply and VGA plug I dont however have the front pannel audio board. When I switch the machine on the green LED on the logic board lights up and the drive's spin there is however no VIDEO or chimes through the headphone jack. Is the front pannel audio board required for the machine to boot? If so does anyone know the pinouts are from the audio connector on the logic board?

Thanks,
Justin Moore.