Jump to content

Recapping accident on Macintosh Classic :-(

Recommended Posts

Hi Guys,


I finally got lucky and scored a Macintosh Classic in good shape. It got (of course) the checkerboard issue due to capacitor leakage. The board looks pretty clean but looking closer revealed that the capacitors close to the power connector leaked (C5, C6, C8, C9) . The one worst was C6 and when I tried to unsolder him I managed to rip off the negative solder pad (the side with the black stripe on the cap).


Anyone able to tell me where I can wire the negative of the replacement capacitor to instead? Just hope I am not completely screwed now :-(.

Link to post
Share on other sites

Thanks Guys, under a strong magnifying lens and after unsoldering all of them I saw how the pads connect with the circuit. There was still that line left that lead into the pad. After scratching off a bit of the protective layer I was able to connect the negative side of the capacitor to it.


Replaced all 4 caps that are below the power connector and after the 3rd attempt turning on the Mac, it actually booted up. So it does start now but it takes a few attempts. It’s a bit funny, even when it boots it comes up with the checkerboard first. Then it disappears and it boots.


Still have two surface mount caps to replace on the logic board today. But maybe worthwhile to have a look at the analog board.

Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

  • Create New...