Thanks everybody. I was eventually able to get the machine to boot, after removing the dead PRAM battery, and wiping away capacitor goo with a pencil eraser. But it's still got problems.
It boots fine from the keyboard's power button, but the power switch at the back of the machine still only does clicky-clicky when pressed. If I hold the power switch in, the machine will boot and run, but I have to keep my finger holding the power switch in the whole time. As soon as I release the switch, it shuts off.
No sound at all from the built-in speaker.
I'm assuming since it boots and runs okay from the keyboard power button, that means the PSU is ok? And it just needs a motherboard recap like everybody's saying? I've never done one before, so I guess I'm dragging my feet looking for other explanations.
It boots fine from the keyboard's power button, but the power switch at the back of the machine still only does clicky-clicky when pressed. If I hold the power switch in, the machine will boot and run, but I have to keep my finger holding the power switch in the whole time. As soon as I release the switch, it shuts off.
No sound at all from the built-in speaker.
I'm assuming since it boots and runs okay from the keyboard power button, that means the PSU is ok? And it just needs a motherboard recap like everybody's saying? I've never done one before, so I guess I'm dragging my feet looking for other explanations.