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So I vaguely recall seeing another thread or post about the reset and interrupt button being the issue, so i decided to test these and there seems to be something weird going on, when the button is released, there's actually continuity, setting the multimeter to resistance, makes it reads 770...

Well i tested the connections on the ROM SIMM to the board to rule that out, and there are no problems there, man this makes me feel really defeated, it seems almost everything has been tested by now,but i still get the simasima pattern on the screen and no startup chime so i guess it's probably...

I get 5.6v and 12.3 on the HDD power cable,  and i took a look at UJ2, UJ3, and UJ4, there appears to be corrosion on the solder itself, but i cant see any damage to the joints, maybe i should reflow them with the iron just to be safe?

Which pin on the HDD connector is +5V?

I believe I found the culprit, unless there's any other reason why it is like so, so i decided to test the voltages on the board , going by the floppy ports, the +12v seemed unstable and there is no +5v, it's just completly dead, multimeter reads 0.00 So that's an analog board issue then, are...

Here are the pictures you asked for  https://imgur.com/a/pu4k8

Seems I cant edit the post anymore, but now it's 12 hours later and I removed the battery holder from the board, but I cant see anything resembling a broken or damaged trace, maybe I just need to wash it again? https://imgur.com/a/fO0G8

Here are pictures of the board itself https://imgur.com/a/YIb77 To clear any potential confusion and unnecessary extra posts, yes the ROM and RAM was inserted when i tried to boot

So, I got a SE/30 for free since it was in pretty bad condition, screen burn in, dead HDD, and horizontal bars and no startup chime, now I've never had to restore a mac like this, my Classic II has never given me any issues (and of which i have removed the clock battery to prevent leakage) ...