As someone who recently did a recapping on his own SE/30...
Try to clean up all that gunk as much as possible where the old caps were.
Go slow and be patient, especially if you got the same "replacement" caps as I did, as they're larger than the old electrolytics and so there's very little...
It's true that 7.5.3 boots on a stock SE/30 without patching, if you use one of the 32-bit rom-simms (I use a GGLabs not Rominator, but probably the same rom in the end...) you actually do need to do a resedit patch of the System file and System Update file to get it to play nice.
Seriously, color me COMPLETELY shocked.
I was using the Zip Drive on my SE/30 to rescue all of the data that have been trapped on some zip disks I have since the late 90s and in the process I came across my old MIDI and MOD/S3M music collection.
I haven't yet succeeded in finding a good MOD...
Have you checked that your bootstrap HDA has the proper hash, maybe there was a download issue? I was able to install from that onto my SE/30. Note that it was a ShrinkWrap 3.5 image. I just double-clicked and it opened up on my desktop. It doesn't work through DropDisk/Disk Copy.
Also, I have...
This morning was the first time I heard my SE/30's boot up chime!
It was a bit of a painful recap, as the tantalum caps I got were larger than the original electrolytics so getting enough pad space to solder took time.
Also along the way I learned that if I'm going to attempt this again, I need...
All part of the learning process I guess. At least this gives me a solid guess as to what the issue probably is.
Also, oddly enough, things look a lot dirtier in that photo than they do just looking here at the board in person...
Thanks again all!
Then I have been lied to!
I believed it due to some of the caps being notably smaller than the outlines on the board which I know is sometimes the case when using newer components. Guess that tells me what my next step is.
Awesome this is all super helpful.
Attached are some shots of the mainboard front and back (with maxed ram, but stock rom-simm as I was playing w/ A/UX on it which didn't like the 32-bit clean rom...). Started looking through that circuit diagram and so far all of the connections that should be...
I've been enjoying my SE/30 for a bit now, but the audio is lacking. I can get quiet audio from my headphones if I set volumes to max. If I try to run it through powered speakers I have to crank it to the point where the signal gets rather noisy and unpleasant. Needless to say the built-in...