Macintosh Classic boot – is this normal?

[chadseld]

I replaced the capacitors, but that did not fix the issue. I also ran a small rewire at the pin where I noticed the discontinuity (after verifying that this same connection has continuity on the working logic board). I suspect that there are more broken connections that I have not found. Without a schematic I don't think I will locate any more since I get cross-eyed trying to follow the maze of traces.

 

[Macdrone]

I do not think the traces will be reflowed by the oven trick but just be careful you dont melt the plastic on the motherboard is all.

 

[Elfen]

You need to have the over at over 400°F to reflow solder in an oven and that would thermal shock the logic board (more traces will break!) and you may even burn out some chips too. It is better to do it spot by spot a trace at a time.

 

[chadseld]

You guys were totally correct. My oven reflow went badly. I'm ashamed to say I overcooked the board and made things worse. This classic will have to live as a sculpture on my bookshelf, and not as a working Mac.