techknight's latest activity
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Board Nominations
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Hey Guest, MARCHintosh 2026 is upon us. Check out community projects, join GlobalTalk, and have fun!
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techknight replied to the thread PowerBook power adapter compatibility?.The Portable is a unique beast because all the voltage regulators take its reference point at the battery, and NOT the AC Adapter unlike...
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techknight replied to the thread PowerBook power adapter compatibility?.I ended up fixing this machine, and the more I dove into it, the more I realized that I think someone shoved a 12V or even a 19V adapter...
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techknight replied to the thread PowerBook power adapter compatibility?.Its the batteries. NiCd/NiMH/Lead Acid batteries want to consume as much current as it can when deeply discharged to start building a...
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techknight replied to the thread My SE/30 has developped distorted sound in 2026.Missing one-half of the waveform. Either the upper or lower transistor failed in the audio output stage, or you are missing the -12V.
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techknight replied to the thread PowerBook 180c TRACKBALL Repair Help Needed.They're sapphire point bearings, it allows the ball to roll around smoothly.
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techknight replied to the thread Reconnaissance: Modern Diagnostics for your Classic Mac.Woah this is amazing! PLEEEEASE Add the portable!
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techknight replied to the thread Dynamic Engineering Portable PDS RAM Card.Here they are:
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techknight replied to the thread Dynamic Engineering Portable PDS RAM Card.Pretty sure I have the schematics and PAL code (on hardcopy) for this card. I cannot recall if i ever made that public or not. I think i...
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techknight replied to the thread Who Am I... The Power PC Performas.I kinda wonder if it should just be "Power Macintosh" consolidated at this point, with the split being only old world/new world?
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techknight replied to the thread Advice wanted: epoxy replacement on flyback.Not only that but audible ringing. if the core is loose, it'll vibrate at the line frequency as well as all of the harmonic/fundamentals...
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techknight replied to the thread Fixing a Macintosh Portable - What worked for me.It absolutely was a flaw, and what I find even more interesting is some portables do this, while others do not. I think its crap getting...
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techknight replied to the thread Fixing a Macintosh Portable - What worked for me.I have occasionally had to bypass the high-side load switch MOSFET for the sound circuitry because it gets noisy if not, 12V hovers...
