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there is no prominent damage from battery acid. But I'll look at the traces and vias in that area.  thank you for the advise.

When I turn on the board I get a fast error chime, no video. When I install a ROM sim I will get a green striped screen. Jumper is in . All memory populated or 4 RAM populated makes no difference. swapped for other RAM it makes no difference, either. The Power up circuit seems fine. So what is...

I removed the SIMM sockets and will be replacing them with new ones. BTW  The memory SIMMS are always to be populated by entire banks of 4. So that was of no issue.

thanks, that's probably good advise.

I am leaning towards the RAM SIMMS as well. I have Single row SIMMS with the metal clips. I don't like them too much. I'll shop for double rows. So far I have scrubbed the pins with alcohol and baking soda. Then I have touched up the solder pins . It didn't make any changes.

Here is a curious issue I am having. I turn on the IIci and the board gives a chime, then a gray boot screen but the corners are still there and then the death chime comes in. I can replace the RAM with different models and get different results. The NEC for instance give a different error than...

awesome thank you

Does anyone have the logic board schematics for a Iici? I have the IIci start up circuit but I need them all.

Yes

This board shows the capacitor leakage really nicely thanks to being so dusty

I would assume so

As per my first post, I replaced the speaker jack

between C2 and R10, and between R10 and J23 is continuity.

Yes the speaker is good I use it for many tests.

All caps replaced, traces seem ok, replaced the speaker jack, but the issue is still there. Any thoughts? There is either no sound or sound with the external speaker plugged in.

That was a good guess. So yes, Faulty RAM

There is only one Video ROM or VROM, as it's sometimes called.  you can see it in the picture of the Logic Board I have posted in my last post. It's the chip next to the Silk screen label , which reads 'Video ROM' That's how I found it first, anyway.

in this next challenge for you, I have SE/30 logic board that has a good screen at first with a start up chime. You'll notice that there is no mouse pointer and after a second or two there is a short melody followed by a death chime.  

So here is what I have done. I first took off the Sound chips and cleaned underneath them and checked the traces beneath the chips. Then I installed some double wipe sockets. After that I reconnected the 12v+ to the sound chips from C2. I coated the spaghetti wire with conformal coating to...

see my post above yours