When I turn on my Apple II Plus, the system doesn't boot and the power supply makes a rapid ticking noise. When I disconnect the power supply, I can read the correct voltages on the Power Supply connector. At this point, I am unsure as to whether the power supply isn't putting out the proper current or there is a problem on the system board.
From +5vdc to ground, on the system board, measures around 218 ohms. I have all the cards removed, the power supply disconnected, and the keyboard disconnected. 218 ohms sounds rather low to me. Is this expected or did something blow out on the system board?