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Anyone?  I'm just trying to find out what's inside the piece of heatshrink wrap on the wire going from the positive terminal of the 9V battery clip to the switch.

US Mac analog boards use those RIFA caps as well.  Older ones like the 128k and 512k have one big Rifa PME271 type at reference C28, later model Plus boards use one of those smaller ones IIRC.  Most Apple II power supplies have them as well.  You don't hear about them exploding as frequently in...

My Mac Portable's battery wiring harness looks like somebody tried to put on a new connector but didn't have the right tools so they just haphazardly twisted wires together and taped them.  I have 9V connectors and want to fix this the right way, but when looking at a picture of an apparently...

I've seen some sources online suggest bending the metal contacts in the holder.  Note that when I say holder, I mean the thing on the Portable that the pack slides into, not the plastic box that the cells are inside (which obviously has to be 'modified' by opening it to replace cells).

I didn't mean to make a useless thread, I've just heard a lot of people say that the original batteries are hard to get.  Admittedly, $50 is more expensive than $15 for a cheapo UPS battery, but it doesn't involve modifying the battery holder on the machine and these are probably better quality...

I recently bought a nonworking Mac Portable as a restoration project, and the first thing I decided to do was replace the battery.  I know some people have had luck using off the shelf rectangular 6V lead-acid batteries and modifying the Portable's battery holder, but since the original cells...

I wonder if the different variations of Indigo were from different factories, or if it was just subtle differences in plastic batches.  G3 iMacs were built in different places on different continents, I've seen at least: XA (Apple Elk Grove, CA USA) RN (LG Mexicali, Mexico) SG (Apple...

It may very well be a bad flyback, tray-loading G3 iMacs were rather notorious for eating them. A bad transistor or cold solder joint is certainly possible, but the fact that you heard arcing at least once may mean that shorts are starting to form in the flyback. If nothing else, they can still...

I would think CF would be far more reliable than your average microSD card.  I work for a manufacturer of high-performance storage servers who used CF cards as boot media for many years, and data getting corrupted or cards getting worn out is extremely uncommon and usually caused by a power...

Exactly.  Any battery can leak given the right conditions.  The Maxells appear far more prone to doing so, but given the potential for very severe damage I think "remove all PRAM batteries" is the best strategy.  Apple isn't making any more logic boards for these, and even if you can repair the...

Not ejecting sounds like a bad drive to me, possibly a bad IWM chip (it's socketed, next to the 2 ROMs).  1.44MB drives will work in a non-FDHD SE, you just won't be able to read/write 1.44MB disks in it.  I had a 1.44 out of an LC in my SE for years and years until I needed a 1.44 for another...

The MR824 diode that is a recommended replacement for the GI854s used at CR1 and CR5 on compact Mac analog boards appears to be discontinued, does anyone here know of a suitable replacement?  To me it looks like Vishay EGP50G-E3/54 might be a suitable replacement (see datasheet at...

I'm repairing a 512k with video issues for somebody, and when I disassembled the machine to get at the analog board, I discovered that the white plastic shield with the adjustment labels on it was held on with double-sided tape rather than the usual plastic push pins.  Has anyone seen this...

I'm not sure how many people here are familiar with the demoscene, but the basic idea is: some programmers want to show off their mad programming skills and/or how good their hardware is, so they write a "demo," a graphics/sound program. PC demos are everywhere and tend to have some pretty...

So, I've recently discovered that Carnegie Mellon's computer club owns a Lisa 2/10 (unfortunately with Mac XL mods). I'm trying to get this machine operable again, but we want to bench-test the power supply before we attempt to boot the machine with it. Does anyone here know the pinout for the...

Yeah, I don't really need a high capacity drive to go in a Mac SE. Running 6.0.8, and only storing one very small FileMaker database and a bunch of Acta outlines there's just no point to anything over a few hundred megs. I was hoping someone on the board would have something they didn't need...

I wasn't talking about using SE/30 ROMs. I was considering replacing the entire logic board with an SE/30 board. IIRC, the SE/30 uses a ROM SIMM instead of socketed ROMs anyhow. What I was looking for was either the logic board from an SE FDHD or SE/30, or just the 3 ROM chips from an FDHD, as...

I have decided to use my Mac SE as a recipe box in my kitchen (Before I receive any death threats: I mean I'm storing recipes on the computer, I have no intent of gutting a Mac and filling it with paper recipe cards), but it needs some repairs. The repairs I can do, but I don't know a good...

I may be able to obtain a logic board from a 600 MHz G3 iMac cheaply. Can this be put into my 400 MHz iMac? If so, what (if any) modifications are necessary to do so? Thanks.