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I've now tested the SE/30 with a different logic board, one from an SE. The board looks fine and I'm fairly positive it works, but the SE/30 is behaving the same: black screen with the vertical line, one plong from the speaker, fan spinning, but otherwise dead. I suppose I need to do what eR1c...

Another question -- if I put a working SE logic board in a faulty SE/30, is there any (reasonable) risk that the working logic board will be messed up by incorrect voltages and such from a broken PSU/analog board?

Thanks for the replies!

Can I take a logic board from a Mac SE and put it in an SE/30 and it'll work right away (given that there are no defects anywhere) ? It would be useful for debugging purposes on my compact macs.

Thanks for the quick replies, and Elfen - thanks for the thourough reply. I suppose I should start with what bibilit says: check the PSU outputs to make sure there's power there at all. I did adjust the brightness control now, and noticed there is a faint vertical line straight through the...

First post here ... hope you don't mind me asking for some help. I was lucky to get my hands on an SE/30 for free last week, but it won't boot. The fan runs, and it starts with the familiar bing in the speaker, but the screen is dead ('cept for some glow in the tube in the back) and there is no...