Garrett's latest activity
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Garrett replied to the thread LC575 computer killed LC520 motherboard! 😭.Hi James, here's another idea. I once had a Color Classic board which would power up, but never "bonged" or displayed an image. The fix... -
Garrett replied to the thread Mac IIci cache card.See my post in this thread. I included a few benchmarks from the Apple Diagnostics application...
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Garrett replied to the thread Identifying mystery macintosh SE Accelerator/upgrade card.That's the first time I've ever seen a 68EC030 in use on a Mac. Was the lack of MMU acceptable on a machine that shipped with a 68000...
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Garrett replied to the thread Color Classic Flyback Replacement from LC5xx.Are you using the High Res or VGA modded analog board? That may factor into the types of adjustments available. I've only ever done the...
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Garrett replied to the thread Color Classic Flyback Replacement from LC5xx.Yup, that sort of behavior is almost certainly a failing flyback. Replacing capacitors and/or the CRT isn't going to help.
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Garrett replied to the thread Color Classic Flyback Replacement from LC5xx.I couldn’t live with the improper size and removed the 575 flyback right after I tested it. Based on what you’ve said, it does sound...
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Garrett replied to the thread Macintosh II Advanced Diagnostic Techniques.I share the same feelings regarding the TechStep. I was so excited to get my hands on an original one when an opportunity presented. The...
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Garrett replied to the thread Opening an oscillator can to determine cause of failure.This is so fascinating. I’ve never thought to open one of these up for inspection. I don’t think my ultrasonic cleaner has killed any...