David Cook's latest activity
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Hey Guest, MARCHintosh 2026 is upon us. Check out community projects, join GlobalTalk, and have fun!
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David Cook replied to the thread LC575 computer killed LC520 motherboard! 😭.Holy moly! Check out that second picture from @Oelmuvun. I did not expect so much grime/tarnish. -
David Cook replied to the thread LC575 computer killed LC520 motherboard! 😭.Thank you for your perseverance -- even in sickness. When you're up to it, bump the speed back to 33 MHz. I'm almost positive that the...
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David Cook replied to the thread Fixing a Macintosh Portable - What worked for me.I have reached the end of my Macintosh Portable pile. The final Portable did not power on and did not change current usage (as displayed...
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David Cook replied to the thread LC575 computer killed LC520 motherboard! 😭.Hope you feel better soon! I don't think the clock speed has anything to do with it. Thanks for cleaning the fingers. It will be...
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David Cook replied to the thread First 100 personalized Mac's.Paul Tavenier (left Apple end of 1984) has one. He's responding to forum posts if you have any questions...
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David Cook replied to the thread LC575 computer killed LC520 motherboard! 😭.I know exactly your concern about DeOxit. I think you should play it safe and just use IPA on the motherboard for the first attempt...
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David Cook replied to the thread LC575 computer killed LC520 motherboard! 😭.Attached is Apple's Color Classic schematic. See page 12 for the connector pinouts. We assume the LC 520 pinouts are the same, even if...
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David Cook replied to the thread LC575 computer killed LC520 motherboard! 😭.We are making progress. We have seen a number of things that are working. The fact that audio worked and the CRT worked briefly means...
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David Cook replied to the thread LC575 computer killed LC520 motherboard! 😭.One more thing when you get home from work. Confirm that you hear a sound from the floppy drive during test step 5 SWIM test.
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David Cook replied to the thread LC575 computer killed LC520 motherboard! 😭.I got my reproduction TechStep from @max1zzz during the following thread...
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David Cook replied to the thread LC575 computer killed LC520 motherboard! 😭.What have we learned? Your CPU is working. Your ROMs are good (checksum passed). Your bus is working (memory and ROM tests). Your CUDA...
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