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Well the Mac Classic 2 is currently booting reliably (still off the internal drive for now ) using my number 1 board. I reflashed the blue scsi but the system refuses to boot from it even if I externally power it so not sure what is going on with that . So I inspected my 2nd Mac Classic 2 logic...

Annnd we are back. The Mac decided to boot again last night with my one good board . So now I think the black screen no chime may not be about the logic board , may be the analog board . Voltages are good ... so tonight I will try the other board again . I am a bit suspicious of a blue scsi I...

The board is recapped , the opto's replaced (thanks to @pocketscience for that tip !) also a couple of diodes . It booted fine a dozen or so times (30 year old hard drive came back to , that was a surprise!) but now black screen and no chime but the fan runs . Going to run some voltage tests...

Thanks will do! My good logic board went the same way last night so now I am looking suspiciously at the Analog board.

So I have 3 classic 2 LB’s . 1 works perfectly after a recap and bath . The second one does not chime and the screen stays black . It’s been recapped , the traces look great , little or no cap leakage I can see. Where should I start looking to get it going ? Thanks in advance !

Thanks ! not sure I will be plating anything just want to arrest the rust so it doesn't get any worse !

Anyone have a preferred treatment for rust on classic macs? Keen to treat it on my classic so it does not get worse.

I have the same issue with a mac classic 2 board . Consensus is that it may be bad rom . But I am checking my recap to make sure.

No idea but I have found them on mouser so going to give them a try …

Sure is , that’s very lucky . Good to know there is another Tinkerer nearby in case I need to borrow a cup of Flux!

Wow that would be great! I can come to you or borrow the machine . I am in Lane Cove.

Yes so much for the new normal and all our extra time ….. feels like the old normal! Oh well will just have to slog on with getting the analogue board working!

😂

Hi All, I am repairing 3 Mac Classic 2 logic boards . Yesterday was meant to be ‘Chime Day’. Well that didn’t happen. I think it’s the analog board, but that’s another story. I have recapped ,inspected and cleaned the logic boards with my ultrasonic cleaner . I am keen to try them out in a...

Morning! I have to replace these caps . Does anyone know where I can buy a suitable replacement? I had done all the others Bruce recommended but these 2 sneaky buggers were hiding. now going to ultrasonic this board and get inspecting!

Yes I put them through a little isopropyl bath . They look like new! Drying nicely in a warm room.

Going to air dry for 4 days then put them in the sun for an hour . Thursday I hope wil be Happy Mac day . This project has taken hours of Branchus videos and a lot of gear purchasing (you need a hobby she said …..) . Very glad to have found this community!

Hi all , I came into a couple of ‘ not working. For parts ‘ power mac G3’s (blue and white. ) Any suggestions on resources I can read to get to grips with issues . I’m comfortable with component level repair, just not sure where to start with these!

Yes completely fine ! This is a hobby after all. This forum is great very responsive.

Thanks , yes I have IPA and will do a shallow jiggle bath . I just find the idea of putting the Ana log board in the cleaner a tad radical ! Good to know the drying process is much the same, maybe just a bit longer ….