Greetings and welcome to the 68kmla forums!
After reading through your post, it is hard to say if on fact the capacitors are faulty, even though they are known to fail. To best determine if they are bad, you will need to do a couple things:
1) Remove every RAM (memory) card and the ROM SIMM (the card closest to the lithium battery), visually inspect for discoloration or corrosion and clean thoroughly (this includes all the SIMM sockets as well.
2) Visually inspect the logic board(s) for any discoloration or corrosion. Some of the capacitors have been known to leak electrolyte material and for it to flow and dry onto the PCB over time. If you see a white cloudy residue or green-like corrosion around any traces on the PCB, you can clean this off using a tiny wire brush and some Isopropyl (rubbing) alcohol, but not a whole lot. You can also use a pencil eraser on traces to clean contacts and traces, as well.
If after cleaning the logic board(s) doesn't fix the problem, then you may very well have bad capacitors. The ones needing replacement will be C1 through C13; this includes the two radial axis electrolytic caps, while the rest are (1) 16WVDC 1uF SMT (surface mount) and (10) 25WVDC 470uF SMT capacitors. If you need replacement parts, get in touch with 68kmla forum member Trag; he sells the SE/30 recap kit and can send it to you. If you need someone to do the actual replacing of parts, I am available for the work. I provide more details in this previous post. Just send me a PM (private message) and we can talk further. I've helped a few members here with successfully recapping their SE/30 logic boards.
Cheers!
73s de Phreakout. :rambo:
After reading through your post, it is hard to say if on fact the capacitors are faulty, even though they are known to fail. To best determine if they are bad, you will need to do a couple things:
1) Remove every RAM (memory) card and the ROM SIMM (the card closest to the lithium battery), visually inspect for discoloration or corrosion and clean thoroughly (this includes all the SIMM sockets as well.
2) Visually inspect the logic board(s) for any discoloration or corrosion. Some of the capacitors have been known to leak electrolyte material and for it to flow and dry onto the PCB over time. If you see a white cloudy residue or green-like corrosion around any traces on the PCB, you can clean this off using a tiny wire brush and some Isopropyl (rubbing) alcohol, but not a whole lot. You can also use a pencil eraser on traces to clean contacts and traces, as well.
If after cleaning the logic board(s) doesn't fix the problem, then you may very well have bad capacitors. The ones needing replacement will be C1 through C13; this includes the two radial axis electrolytic caps, while the rest are (1) 16WVDC 1uF SMT (surface mount) and (10) 25WVDC 470uF SMT capacitors. If you need replacement parts, get in touch with 68kmla forum member Trag; he sells the SE/30 recap kit and can send it to you. If you need someone to do the actual replacing of parts, I am available for the work. I provide more details in this previous post. Just send me a PM (private message) and we can talk further. I've helped a few members here with successfully recapping their SE/30 logic boards.
Cheers!
73s de Phreakout. :rambo: