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Legacy Personal Blogs Another vintage Macintosh restoration
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  • Author Author: zuctronic
  • Date Created: 4 Mar 2017 1:18 AM Date Created
  • Views 384 views
  • Likes 5 likes
  • Comments 2 comments
  • restoration
  • vintage
  • capacitors
  • apple
  • macintosh
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Another vintage Macintosh restoration

zuctronic
zuctronic
4 Mar 2017

I like to keep my eye on Craigslist and eBay for good deals on old computers. I get pretty excited when I see something that says, "not tested, AS-IS" or even if it's just straight up broken - because that gives me an opportunity to fix something! So last week when I saw a Macintosh SE/30 with "no video" for cheap just a few blocks from my office in Chicago, you bet I ran to get it

 

So after I got it home and opened it up, I noticed the video board was not plugged into the back of the CRT. This would obviously account for the "no video" ... but would it be the only problem? I plugged it back in and tried turning it on (for the first time) ... lo' and behold! It booted right up with a floppy disk in the drive.

 

image

 

But wait a minute, there's no audio! Or maybe there is... (I flipped the switch on and off a few times) there is a faint chime, but something is wrong. We're going to need a closer look.

 

 

image

 

Ok, first of all - I'm lucky that battery hasn't leaked or worse. It is the original, nearly 30-year-old, PRAM battery. So that's going to come out and be replaced, I keep a few spares on hand. Secondly, every SMD capacitor on this board is leaking... there is corrosion on the legs of several ICs, so this is going to need emergency treatment.

 

image

 

I replaced just these three caps with tantalum caps from Newark and the sound is loud and proud again. I've also installed (temporarily) a BMWOW ROM-inator II so I can quickly test RAM and copy an OS over to a new hard drive. This really a great tool for testing old Mac II and SE/30 computers. You can boot from it and there are even a few games pre-installed on the ROM/RAM disk!

 

imageimage

 

Stay tuned for part 2 as I replace the rest of the capacitors and install a SCSI hard drive!

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  • mcb1
    mcb1 over 6 years ago

    Nice to see someone resurrecting old hardware.

    While they may never perform like newer technololgy, our next generation should be able to see where we've been, just as we have with transportation, etc.

     

    It looks like it has a good collection of dust, but must have been kept in a dry place.

     

     

    Mark

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  • clem57
    clem57 over 6 years ago

    What a find! With care and a little spit and polish you done great. Looking forward to part two.

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