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if it's an extension or control panel, can't you just locate the suspect file after booting without extensions and then drop it in the trash?

congratulations! it's so much fun finding hidden surprises like an accelerator card in an SE. 

You might be trying to shove an IDE drive into your SCSI SE. For a SCSI Mac, I would recommend just going SCSI2SD and call it done. As for memory, the SE goes all the way up to 4MB of RAM using (4) 1MB 30-pin SIMMs. These are super cheap so you might as well "max it out." Also, if you have a...

Looks like my most from last night got nuked. I checked the voltages and they do not fluctuate under load. The only weird thing is that pin 9 on both headers is +12vdc and not +5vdc as described here: http://www.hardwarebook.info/Apple_Macintosh_Internal_Floppy_disk_drive Another twist, I was...

hrmmm, I will have to check. that sounds like a reasonable place to start. I haven't tried this board/drives with a different power supply. Will check loads. Thanks for the tip!

Yes, painfully familiar! It will boot, but takes 5 minutes or so. Hrmmm, maybe the mainboard is a good candidate for a single floppy 800k SE then. :) Another strange twist, if I plug my floppy emu into the external floppy port and try to use the upper connector with an 800k drive, it runs...

I've got this dual 800k SE with a peculiar floppy issue. Both 800k drives work great when plugged in by themselves to either the upper or lower connector on the mainboard. However, when I connect both up at the same time, the floppy drive connected to the upper connector is very, very, very...

"He's dead, Jim."

Congratulations Huxley! That black hardware is so sexy isn't it? 

I ended up picking it up but it's in pretty bad shape. figured I'd rescue it from further harm. the frame is solid, but the desk had been stored in a damp location and the melamine coated particle board has swollen a lot. gonna see if I can get replacement melamine from Home Depot and rebuild...

Been looking for one of these for a while, and one showed up locally for $100. Thought I'd offer him $80 -- decent enough deal? Thought it would look nice with some Macs on it. The Scanco MacTable!

I believe C10 and C13 have traces running UNDER the SMD as well that can get rotted from the electrolytics. Sometimes you have to remove the cap, clean, and then bodge the trace before replacing the cap. 

Indeed! That bottom pic is leaky caps. I'm sure the IIci has leaky caps too. Just because you can't clearly see it, it's there. if you remove a cap and look with a magnifier, you will see it. I don't recall if the Iici needs batteries to boot. I use these from...

With any of them, you probably want to start by replacing all SMD capacitors on the motherboards and cleaning up any leakage and inspecting for damaged traces. Then try them out and go from there. On the IIci (dunno about the IIcx), there are SMD caps back near the power circuit that can wreck...

(almost) anything is fixable, but that looks like a lot of damage. Lots of corrosion on IC legs and eaten traces. Myself, if I had a board with that much damage, I would give up and donate it to science. But my threshold for pain is low. :)

Thanks superjer2000.  Were the diodes on yours visibly damaged? They appear OK on mine, probably should test them before placing my next component order. :)

 Thanks ScutBoy, I don't think you need to salvage them from an existing board, you should be able to buy them new. If you have some in good shape though, plz let me know. Here's where they are at:

This is a dumb request, but I'm hoping someone here has replaced 1 or both of the 74HC132 ICs in the IIci and can point me at the correct IC to order. I purchased a couple from DigiKey and they ended up being the wrong size. Derp. Thanks!

oh yeah, if you were in the US, I'd be knocking on your door with a briefcase full of cash for the Radius. :)

Nice work @Kai Robinson -- thanks for posting your progress!