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All right... With the help of a friend I tried the "dishwasher trick" on the pinstripe board, and there was absolutely no change. It's still exactly as before; sound works, but the lines (as pictured above) are still present.

Hm... there is (low-volume) sound with headphones. And now that I listen for it, there is some barely-audible sound coming out of the speaker if the volume's all the way up, though I'm not sure whether it was always there or if it's just a result of all the extra cleaning and component swapping...

Okay, it's not the RAM or the ROM causing the video issue (drat!) It's definitely something on the logic board itself. I have tried swapping out every component that is user-replaceable, and none of it has any impact on the pinstripes. So I guess unless I recap, I'm stuck with one computer that...

That's part of why I'm thinking this may be the way to go. As I said, I don't have anything besides these two SE/30s that uses floppy disks at home, and I threw out all my old floppies seven or eight years ago. Since I can't seem to get this machine to accept the floppies I'm making anyway, they...

I've tried three different methods I've found on the forums for making Mac boot disks on a PC, and so far the SE/30 is rejecting everything. I may just have to bite the bullet and track down a legitimate set of System 7 disks. I also saw a thread about replacing the hard drive with a CF card...

Well, I guess that depends on your definition of better. Previously, the pinstripes were one dead column and one flickering column each. Now it's just two dead columns each. Also: I have the non-pinstriped SE/30 at work with me, and I tried making a boot disk using resources I found on the...

Yes, the problems traveled with the logic boards. The swapping I did was to see whether the problem was on the logic board or the analog board; and since the problems traveled with the logic boards, that answered that. The logic board with pinstriped video always has pinstriped video, and the...

All right, I've done a more thorough inspection of both logic boards, and there doesn't seem to be any visual evidence of capacitor leakage... though I know there's no foolproof way to tell a bad cap other than to remove it and throw it in a tester. I did some very light cleaning with rubbing...

Thanks, everyone, for all the information so far! I know this must be the sort of thing you go through each time someone shows up for the first time with a "new" compact Mac, but I really appreciate the help. So, let me double check all this: 1. I'd really like to have greyscale graphics, but...

Thank you for your help! I didn't see any noticeable leakage in either machine, but I'll give both of them a more thorough run-down tonight (including a proper cleaning of the SIMM and ROM sockets; in my initial testing, I re-seated but did not clean). I'm a little nervous about trying to recap...

Hi, everyone. I'm new. This board was recommended to me by someone on another forum, and I'm just looking for some help getting started. I recently came into possession of two Mac SE/30s, each of which has a slightly different set of problems. One has a 160MB hard drive and four 1MB SIMMS. It...