Mac Classic Analog Board - Clicking sound with oscillating 12v and less than 1v on the 5v rail

[oliviaiacovou]

Recapped this analog board because it took minutes to charge up the caps and to get to a working voltage, however since recapping I only get the issue described in the title. The same issue occurs with and without the logic board, and I’ve also recapped that too. Any ideas?

 

[GiGaBiTe]

If there's less than a volt on the +5v rail, something is probably shorted out. You'll need to probe around the analog board for more faulty components.

You can try to work backwards from the +5v wire on the PCB and check everything back to the transformer.

 

[Timo W.]

however since recapping I only get the issue described in the title. The same issue occurs with and without the logic board, and I’ve also recapped that too. Any ideas?

Check your work. Might be a solder bridge somewhere or a cap installed backwards.