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So, I disassembled my other Macs and this is what I found: 128k - Dual Logic Board 512k - Dual Logic Board All of them are different, but The position of the components is always the same. Concerning the sound issue, is there any suggestion on what to check? Sorry for the consecutive...

I will use isopropyl alcohol (99) to clean all the board. As far as I know It should be safe. The manufactur theory is intersting. I will try to analyse other 128k boards Thanks

I said upgraded, or reworked because the James'one shoulb be the first release: Link In the one I have Ram slots do not have the apple logo on the left side, but on the right. Cpu is missing the "Apple 83 etc etc" thing, and is also called HD6800. Maybe there were some revisions before the dual...

Hi This is mybsecon post, and my first thread, in this fanatstic forum. I read several discussions to repair my 800ks (or try to repair my mac Plus- still on going) By the way, I have recently bought on ebay a 128k for more or less 400usd (I live in Europe). Once arrived I opened it to see...

Hi, this my first post here. I resume this old thread because I have same problem faced by Will. A macintosh 512k 120v Connected to a 240v outlet. I replaced the fuse and the following caps: C33, C37 and C38 plus CR26. But when I turn the circuit on R44, R45 and R48 went on Fire. Now my idea is...