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Getting Started: a Tale of Two SE/30s
- Thread starter DaMadFiddler
- Start date
Mac128
Well-known member
Osgeld, he has swapped out the logicboards. The video and sound issues go with them.
Well you will definitely have to recap at some point. These Macs are old and had some of the most notoriously bad caps of any of the compacts. So you are not out of the water. best to learn how now.
Sound is an easy fix, and the video may as well.
First thing I would do is stick one of them in the dishwasher and see if that makes any difference. I'd do the video one first as that's the biggest problem.
Also, on the sound, have you tried to plug in headphones to see if that is functional?
Well you will definitely have to recap at some point. These Macs are old and had some of the most notoriously bad caps of any of the compacts. So you are not out of the water. best to learn how now.
Sound is an easy fix, and the video may as well.
First thing I would do is stick one of them in the dishwasher and see if that makes any difference. I'd do the video one first as that's the biggest problem.
Also, on the sound, have you tried to plug in headphones to see if that is functional?
DaMadFiddler
Member
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 I did today.
The dishwasher thing is intriguing; I've never heard of such a thing before. However, we don't have one, so that's not an option.
I did notice a little bit of oxidation where Q1 and Q2 are joined to the logic board on the edge of the no-sound board (though I guess that should be the "faint-sound" board now). That board overall was a little dusty (I've cleaned it up as well as I can), but that was the only point at which I noticed any oxidation.
The pinstripes board looks pristine.
The dishwasher thing is intriguing; I've never heard of such a thing before. However, we don't have one, so that's not an option.
I did notice a little bit of oxidation where Q1 and Q2 are joined to the logic board on the edge of the no-sound board (though I guess that should be the "faint-sound" board now). That board overall was a little dusty (I've cleaned it up as well as I can), but that was the only point at which I noticed any oxidation.
The pinstripes board looks pristine.
phreakout
Well-known member
DaMadFiddler,
One thing I've always had to do after making a set of System 6/7 floppies is "bless" the System Folder. To do that, you go into the Disk Tools floppy, open up the System Folder and then close it again. This "blesses" the System Folder so it will boot.
Another tip, if you have access to it, is to get a Mac model that is currently booting 6 or 7 and use that to create sets of System disks. If not, then you can try and pull it off with a Mac emulator like Mini vMac or the like. For example, I own a Power Mac 7500 and it boots into OS 9.1. But I use it to make boot floppies all the time, since it is at the level closest to understanding and dealing with Classic OS resources.
As for both SE/30 logic boards, at this stage I would recommend replacing all of C1 through C13 capacitors using Trag's recap kit, since cleaning didn't fix the problem and swapping SIMMs didn't help, either. If you's like me to do the recapping, send me a PM (private message) and we'll go from there.
73s de Phreakout. :rambo:
One thing I've always had to do after making a set of System 6/7 floppies is "bless" the System Folder. To do that, you go into the Disk Tools floppy, open up the System Folder and then close it again. This "blesses" the System Folder so it will boot.
Another tip, if you have access to it, is to get a Mac model that is currently booting 6 or 7 and use that to create sets of System disks. If not, then you can try and pull it off with a Mac emulator like Mini vMac or the like. For example, I own a Power Mac 7500 and it boots into OS 9.1. But I use it to make boot floppies all the time, since it is at the level closest to understanding and dealing with Classic OS resources.
As for both SE/30 logic boards, at this stage I would recommend replacing all of C1 through C13 capacitors using Trag's recap kit, since cleaning didn't fix the problem and swapping SIMMs didn't help, either. If you's like me to do the recapping, send me a PM (private message) and we'll go from there.
73s de Phreakout. :rambo:
DaMadFiddler
Member
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.
It's still exactly as before; sound works, but the lines (as pictured above) are still present.
Mac128
Well-known member
Well, now you know. At this point, if you want to salvage the board, you have to escalate to the next step and recap the board. Of course the possibility exists that a leaky cap destroyed something on the logic board, so if re-capping still does not solve the problem, the next step is a thorough investigation of the board under a magnifying glass. Since the caps are the most likely culprit, and will need to be done eventually anyway, that's your next step.
Go ahead and wash the board with the sound problem as well. That may fix the problem even though it did not on the video problem board, but it will eliminate possibilities. The sound circuitry is a little more localized, so you might be looking at a much smaller fix. Of course it too could have board damage, but again, much easier to isolate.
Hopefully some of the SE/30 folks with the experience with this will weigh in and offer more help at this stage.
Go ahead and wash the board with the sound problem as well. That may fix the problem even though it did not on the video problem board, but it will eliminate possibilities. The sound circuitry is a little more localized, so you might be looking at a much smaller fix. Of course it too could have board damage, but again, much easier to isolate.
Hopefully some of the SE/30 folks with the experience with this will weigh in and offer more help at this stage.
TheoryBoy
Member
I had the exact same problem with the jailbars, it was faulty memory chips. I replaced them by taking them off an old mac II video card. I just snipped the legs on the chips and joined them.
http://68kmla.org/forums/viewtopic.php?f=7&t=1047
http://68kmla.org/forums/viewtopic.php?f=7&t=1047
