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Hi all, I have a Mac Classic with a checkerboard pattern. I have recapped the analog and the logic board. I have proved the analog board works with a known working logic board (Board B) and I have proved the Logic board (Board A) also doesn't wok with the known working Analog board. The...

Hi all, can I use a 157-0121 Flyback from a Macintosh Classic AB to replace a Flyback on a 512k AB ? Same screen Clinton 5144.

Hi all, I am still trying to trace my no video issue on my 512k. Looks to me like the heater circuit on the CRT is not working as there is no glow when the unit has power. I can't find much information re how a CRT works but from what I can piece together the following pins on J2 are of...

Hi all, anyone know much about the circuit of the Monitor IIe A2M2010P ? I have one which hasn't been powered on for about 20 years. On power up it has a well lit screen (nice green on full brightness) but doesn't display any of the characters being presented to it. I am suspecting caps need...

Potentially a silly question but how are people connecting their FloppyEMU to the Color Classics given the CC logic board doesn't have a DB19 connector exposed on the back ? I was going to connect the ribbon cable from the internal Floppy straight from the machine into the FloppyEMU after...

Hi, I have experience with the Compact Mac range so IIe's are a new venture for me. I have two both enhanced, I have had one for a years and it works fine, I have just acquired another which has been in a cupboard for about 30 years. I decided to recap the power supply before turning on...

Hi all, I am trying to find a replacement Apple logo pin thing for the front of my M2115, s seems to be smaller than the ones on the front of the Computer cases. Does anyone have a link as to where I can buy one from ?

Hi all, What is the difference between the 630-0102 and 630-0108 Analog boards ? I thought it was that the 102 was a 110v and the 108 was a 240v board but I have recently seen a photo of a 108 board with a 110v sticker.

Hi all, I have just acquired a Color Classic and thought I would take the PRAM battery out until I have time to clean up the machine in case it leaks. To my surprise when I opened it up it has this pin setup where the PRAM battery goes. Does anyone know what the 3 pins are for, I am assuming...

Hi all, Does anyone know of a version of this doc (especially the power circuit section) for the 240v international board for the 512k Analog board ? I am still trying to diagnose a flup flup issue.

I am trying to diagnose a problem with vertical bars on a 512k and want to know if anyone has seen a documented boot sequence for a 128k/512k Mac so I can work through the sequence. I don't have any visual issues on the logicboard so I am down to trying to work out which chips may have problems...

I have acquired a 512k 120v model.  On first inspection the fuse was blown and diode at CR24 was burned out,  I have replaced these and done a complete recap of the electrolytic on the analog and logic board plus the RIFA CAP at C38.  On start up I get no bong and vertical bars as per the photo...

Hi all, I have a Performa 5260 that is dead on power on,  no noise, no smells. no activity.  I am more used to Compact Mac's so this is new territory for me.  I was going to start with a complete recapping of the power board and video board and see if anything changed.  I have pulled a few...

Hi all, I have a Performa 5260 that is dead on power on,  no noise, no smells. no activity.  I am ore used to Compact mac's so this is new territory for me.  I was going toast with a complete recapping of the power board and video board and see if anything changed.  I ave pulled a few resistors...

Hi all, I have an interesting problem with an SE/30 I have just acquired.  It looks like the logic board has been recapped,  so assume good.  When I boot it, it gives me the disk and question mark symbol so doesn't seem to boot from HDD,  when I put either a single system 7 disk or an install...

Hi, I have a Classic and Classic II. I have a problem with the Classic II analog board that I can't fix. It was leaking caps which I have replaced. The Molex connector on the HDD was reading 4.52 and 11.32 volts on the classic II analog board. On the Classic analog board they are reading 4.98...