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    Is there a way to run a PB100 without a functioning battery?

    I just got my PB100 booting, but it boots and immediately brings up a message saying the reserve battery power is depleted and it will go to sleep in 10 seconds. Which makes sense since the battery is dead as a doornail. But this makes the machine unusable. Is there a way to run the machine...
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    Powerbook 100 - sound but no video before recap, video but no sound after recap

    I got a PB100 recently that booted and had sound, but with a constant black screen (not blank). I then recapped both the display and the logic board, and now I get an image on the screen, but there's no sound. Any idea what the culprit could be? Are there schematics out there?
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    7100 with various problems, namely no video

    I got my hands on a barebones 7100, in not the best shape. I cleaned the logic board, but have not yet recapped it (I'll do that eventually, but caps take a few days to arrive and I want to make it work before then if possible). I'm using a modded ATX PSU since the stock one immediately turns...
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    Replacing a 68030 in a IIci?

    I have a IIci board which apparently had a dead 68030, which was removed leaving a clean pad.  I'm trying to figure out what I can use to replace it. I know the IIci ran at 25 MHz, but for some reason 25 MHz 68030s are expensive on eBay.  However, 33 MHz chips seem to be far more plentiful. ...
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    Having trouble with A/UX on a IIfx

    So I've had success with A/UX on all my other machines that can run it except this IIfx.  All I get out of it is a gray screen after it bootstraps, forcing me to reboot.  This happens both when I use the installation floppy coupled with a SCSI2SD with the CD-ROM on it (which is how I installed...
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    Bunch of dead floppy drives -- can they be salvaged?

    I wasn't sure where to post this as this spans Mac categories (these drives came from a II-series, Portable, and SE/30). I have 3 drives that are dead and am wondering if any of them are likely to be fixable, or if I should just toss them and not spend hours on a futile effort. Two of them...
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    My IIfx's tantalum C1 spectacularly released its magic smoke

    I recently acquired a IIfx that was sold as totally dead.  When it arrived, first thing I did was remove the old batteries and swap in new ones (since this machine won't power on without them).  I then tried to turn it on.  Clearly the batteries were the cause of the "totally dead" issue, since...
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    A/UX -- how to fsck a large disk?

    I have A/UX installed on a 4GB disk, which I recently found out is not a good idea since the Startup fsck can't fsck it.  But I really don't want to start over with a fresh A/UX installation.  At the moment the disk was unmounted dirty, but now it won't boot because the disk needs to be fscked...
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    What's wrong with my SE/30?

    It works sometimes, but is unstable, and upon a reboot, I'll get a garbled screen, as shown in the photo.  It does chime, but does not death chime (but the memory checks are probably being skipped due to the ROMinator II that's installed).  It seems to me like this is some sort of RAM issue, but...
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    Are there any NIX OS's other than A/UX which can write floppies?

    I'm trying to set up a headless machine I can download floppy images to, and then write them to disk using dd or equivalent.  I was planning to use a Beige G3 for this, since I figured it probably has the widest variety of OS choices.  Do any of the various NIXes out there (NetBSD, Linux...
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    Please help me figure out what the deal is with this IIx RAM

    I'm trying to upgrade my IIx past 8MB of RAM.  The issue is that none of the RAM I've tried seems to be accepted.  I know the PAL is needed, and SIMMs with less than 8 chips are also no dice.  I got four SIMMs similar to the ones...
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    Mac IIx intermittent RAM issues

    I'm having trouble with RAM being intermittent.  The machine currently has 8 sticks of 1MB each installed.  The problem, however, is that about half the time, it only detects 4MB of RAM.  If I remove the upper bank, it still only detects 4MB, which leads me to believe the problem is in the upper...
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    Problems with Macintosh 12" RGB Display and Mac IIx

    I'm trying to get a Mac 12" RGB display to work with my Mac IIx.  The IIx has a Mac II High Resolution video card installed, which according to this supports the weird 512x384 resolution the monitor demands.  However, I get the weird pattern shown in the attached photo.  This seems to be some...
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    How do I get a 400k boot disk for a 512k?

    I have access to a Mac SE, non-FDHD, a Mac Plus, and a Mac Classic II.  I currently have 400k dsk images for System 4.0 on the SE, but Disk Copy 4.2 doesn't recognize them at all, and Disk Copy 6 refuses to write floppies claiming that I need a drive that can write 400k floppies, which the SE...
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    Please help me resurrect a dead 512k

    I'm currently trying to resurrect a dead 512k that until this morning gave a good chime and displayed a Sad Mac with vertical stripes.  However, after replacing one of the LS244 buffers, the chime is now distorted, as are the visible parts of the screen.  I put back the original LS244, but...
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    Resurrecting a totally dead 400k floppy drive?

    In my other topic I discovered that there was a dead short across the +12v and ground rails of the 400k floppy drive out of my Mac 512k.  I've traced the short from there to the cable that leads to the PCB surrounding the platter motor.   Is this something I can realistically fix or would I be...
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    Dead 512k, rapid clicking?

    I'm working on a dead 512k that's making a rapid clicking noise when turned on.  I took an audio recording and uploaded it here: https://drive.google.com/file/d/12m4cIr_g4gwdeV6ooGvvR8RU5sfe1Vt7/view?usp=sharing I get no chime and no video.  Probing the 5v and 12v lines going to the logic...
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    Replacement power switch for 512k?

    So I'm working on resurrecting a Mac 512k and I think I've stumbled across my first problem -- the power switch seems to be dead.  I measure no continuity across it in either position; I've tested for continuity between each leg and other spots on its trace.  Does anyone know of a suitable...
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    IIci floppy drive troubles

    I'm working on a dead IIci floppy drive.  I already disassembled the floppy loading mechanism and lubricated it, and now it moves smoothly (it was totally jammed before).  Now I seem to have two problems, and they may be related.  The first is that the auto inject motor seems to be stuck.  I...
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    IIci with potentially dead 50MHz oscillator.

    I'm trying to resurrect a IIci which had a Maxell bomb go off, which I caught before the damage was too bad, and only really ended up eating a couple of traces which I patched; I then recapped the entire board.  Using the ATX power supply mod, I'm able to get power to the board, but I have no...
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