What wackymacs said. My first IIcx came to me via post from an eBay seller even further into rural NSW than I was at the time. It was filled with silt, had been through a flood, even leaves had come through the missing nubus slot covers and settled on the logic board. Mice had set up a nest underneath the power supply and filled the box with their droppings and corrosive pee.
A long clean later, it booted right up
.Dana