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My vote is for either purple or black.

Probing the ADB data line I can see a stream of data, although things don't look good. Without the keyboard or mouse attached, everything has nice, 90 degree corners. As soon as I attach the keyboard, the waveform becomes jagged, although still has the same data. Pressing keys predictably does...

Found that the negative side of C13 had not been soldered on. Curse whoever did the recap! Oh wait... 😝 Checked all other caps and while my soldering work isn't the best they are all making contact and secure. Didn't help the ADB issue, but the light on the internal HDD now lights up on initial...

Yep. Although interestingly when booting to the system 7.1 installer from floppy emu, it boots successfully even with the keyboard connected. It doesn't do this for something like disk tools... how wonderfully inconsistent.

My thought too, guess I need to hop back in and check the ADB controller. Just thought I'd check and see if anyone has had this issue, whether it's with the software or hardware side. The boot hanging is what confuses me there.

This is an odd issue: On my SE/30, recently acquired and recapped, everything works fine up until you try to use peripherals. If there is a mouse plugged in, the machine will boot but the mouse is slow and jitters, no matter the surface, even if manipulating the rollers manually. If there is a...

My issue did end up being because of a broken vram trace. Now onto the ADB issue... My experience is limited, but your issue sounds like cap juice messing with the connections. Try poking around with a jumper anyway, to see if you can jump the ram chips to UE8 on vid 0 and 7. That's how I...

That's what I assumed :P

Interesting! Wonder if the ROMs are to blame, that would be an excuse to buy one of the cool reprogrammable SIMMs :D I reflowed the egret again to no avail (maybe a better cleaning is in order, flux residue is annoying), but I couldn't get the caps to look much better, although I'm pretty sure...

Came from factory. I always wondered why none of the boards I saw online had it. Were there even rom SIMMs made for the 475?

Sorry about the images, took them in raw on my phone and didn’t convert them down at all, just to png. I do have a hot air gun and flux, although I have to say I’m not particularly skilled with it. I did all of the caps and reflowing with a soldering iron and flux. Too worried about melting...

I think I've tried about everything that doesn't require sourcing parts or board-level repair; both of which I'm willing to try. Phipli walked me through a ton of troubleshooting in my other thread. I don't have a ram stick in mine, just vram, so nothing to remove :P Battery has been changed...

Board images if it helps somehow. I've got no idea where to go from here other than VRAM which I'm still waiting on. :/

Excited to see this come together, I've got a maxell bombed IIci that's probably beyond saving. I find it amazing that the community is still so alive to make things like these recreations happen.

This scope claims to be 40 MHz, but I may try to pick up a frequency counter. I don't have a VGA Adapter at the moment, I may have to pick one up. I've been using the Apple monitor I have to test. I'm pretty sure it works, it did a few months ago as I recall. That went over my head a bit :P...

Moving this from https://68kmla.org/bb/index.php?threads/wtb-lc-475-logic-board.46276/ to here. Originally wanted to just buy a new one but was given hope that this one is fixable. See trading post thread for more details, but in short I have a 475 with no activity beyond the chime. Board has...

Hello! I know this is a common question, but I just recapped my SE/30 and am getting the Jailbar pattern. The computer completely works, has sound, is stable, etc. Just an issue with the video circuitry. I understand that usually this pattern is linked to an issue with a trace being eaten away...