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Sorry to hear that then  :( . I wish you the best of luck in finding a new board/machine.

Just a side note: if you're reasonably good at soldering, there's a chance you might actually be able to repair the battery-damaged board.

Couldn't find the SE schematics so I checked my own board. Turns out that both of the filters next to the floppy ports are connected in some way between the IWM and both floppy ports, so I'd replace both. According to this post on ThinkClassic they can be replaced by isolated, 16-pin 47-ohm...

Those filters are known to cause problems similar to this in the SE and SE/30.

If I'm not mistaken, the PSU voltages fluctuating the way you describe means one of the rails is shorted. If you're running any PDS cards or drives you might want to try removing them and then try powering on again.

Agreed with the others on replacing the caps. I doubt that the keyboard is the issue; there are different components in the soft power circuit for both powering on and powering off.

I believe the earliest 128k's used a black plastic sheet behind the analog board as opposed to the white one with red lettering that's normally found in Compacts.

The glue on that flyback looks pretty burnt, so I wouldn't be surprised if it's bad. The Dead Mac Scrolls also suggests that the flyback and/or horizontal output transistor are dead. Also, just because the caps look good doesn't necessarily mean they are good.

One of the leads on the AT&T DSP already looks like it's being eaten by the cap goo, although that's probably not the cause of your boot issue. Even if you aren't able to recap the board immediately, it would be a good idea to wash it as soon as possible to prevent more damage.

The IIGS's standard RAM is comprised of 4x 150ns TMS4464 ICs. Compatible parts can be found on eBay, just make sure the number after the hyphen (which indicates the speed) is less than or equal to 15.

Definitely recap it while it still shows some signs of life. The Q840av is notoriously difficult to revive once the damage is too far gone.

Yeah, it looks like the errors are 8 pixels apart from each other. The IIGS stores 4 pixels to a byte in this mode though and it doesn't look like entire groups of 4 pixels are wrong, so it might not be an addressing problem. You could try replacing the Standard RAM, and also reseating the VGC...

Replacement orange Alps can be had here on eBay for around $6 shipped. The Matias ones will work fine, but they might feel a bit out-of-place compared to the other switches in the keyboard.

Maybe there's a corroded trace on the LCD's PCB?

The CRT doesn't always implode if you break it. Usually you'll just hear a faint hissing sound as air fills the tube.

As Jinnai says, there are two types of yo-yo adapters. The one that'll work on the 1400 has a clear connector on the computer side, as opposed to the later one which has a translucent black connector (here's an example of a compatible one on eBay). All of the PowerBook G3 black bricks that...

I know you can get aftermarket 1400 power adapters on eBay from China that are supposedly compatible, but personally I don't really trust those. Don't limit yourself to just looking for a 1400 adapter though, the PowerBook G3's used a compatible adapter (some of the iBook "yo-yo" ones were...

Awesome haul! I don't have any spares, but I can measure the ones in my IIx so you can find new ones, if you want.

Jeez, I'm sorry. I should've remembered to mention not to do that when I linked the image from his site. :(

They both use practically the same board, so yes, the RAM will fit.