68kMLA Classic Interface

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another Mac liberated, but this was a tough one

Posted by: bengi3 on 2018-07-27 15:28:32 After the usual motherboard combo dishwasher-recap, along with full recapping of the analog board, the thing kept showing horizontal white and black stripes. To make it brief: the ROM chip that I had removed for the cleaning, did not make full contact. I had to bend the pins towards the inner part of the ROM slot. The Classic could then boot, but after 10’, smell of burning circuits and dark screen. I tought I had toasted the analog board, while,after a careful inspection I noticed that the SMC in C10 was burnt. I replaced it from a donor logic board, carefully cleaned the logic board with isopropyl alcohol and... bing! Tested the boards with an IR camera: fine, voltage fine. Wonder why the C10 got shorted. Ben

Posted by: bengi3 on 2018-07-28 00:45:42

Posted by: bengi3 on 2018-07-28 02:13:14 https://youtu.be/YmkMjWisI5w

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