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Sounds like we're kind of on the same page. What a number of these advanced FPGAs (basically an SOC FPGA) would offer is kind of what was discussed: you'd interface to the '030 or '040 bus interface and do an on-the-fly 68k-to-[new arch] translation but instead of sending the code to an external...

A Q900 should be one of the transition machines (from roughly 1992-1994) that supports both auto and manual inject drives, at least electrically; the bezel may not line up quite right, though, because it was built fairly early in that period compared to others like the Q800 which were obviously...

Some of these drives do have electrolytic caps on them. They may need replaced. Also, head tension can reduce over time to where they heads don't contact the disk properly. Or your stepper motor can be slightly out of line. Either of these will generally cause problems with multiple disks, not...

Maybe turn it on after boot and use a mounter program for the disks? Otherwise I don't have many suggestions here. MOs are awesome when they work but getting there can be a really frustrating experience. For some reason System 7 does NOT like to play nice with any of the 640MB MOs I try to use...

Sounds like this little 2400 has had a hard life. Unfortunately there really isn't a quick and easy solution for troubleshooting other than what you've already done: remove batteries, press reset button, check for obvious faults (burned or otherwise damaged devices, leaked capacitors, cracked...

So the DVD Decoder card was basically a hardware CardBus MPEG-2 decoder that used ZV to send the finished video stream directly to the screen. I think C-Cube built the chip and was the supplier for all of Apple's hardware MPEG-2 decoders (also used in some configurations of the beige G3, B&W G3...

Most G3 cards will work with System 7.5, unlike G4 upgrades (early versions of G4 upgrades will often work but without Altivec (needs OS 9 minimum or possibly a lot of hacking under 8.5) and without that there's not a ton of reason to use a G4). I usually put 7.6.1 or 8.1 on G3 upgraded...

Sorry but I don't have good news for you: they do not have any radiation warnings on them, even in Japanese. It's possible that they were rebadged and officially sold in the USA by Pioneer or another brand (I also have an IO Data model that's the same thing but it too was JDM and so has no laser...

Nice work. I, along with another guy on here, attempted to convert our 2.7s to standard air cooling, but we've had mixed success: it works, but the fans don't seem to keep up except when running specific Apple programs (i.e. it overheats under Firefox alone but the fans rev up and everything...

Neat. I'd like to find one of those. Also some of the '040 L2 cache cards in the same style. As for the power supply on these, on my attempt I just cracked open both the stock and a suitable ATX unit and resoldered harnesses between them: no fuss, no muss, and everything looks stock (except for...

Apparently Apple didn't sell them officially on non-WGS configurations but the 1MB caches would work in any of the x100 models. I have one in my Pioneer MPC-GX1 Limited (which is a factory overclocked 6100 board in an awesome case). I'd be more interested in finding one of the L2 cache modules...

These things are not unknown for being a little difficult to troubleshoot. It's easiest if you have multiple spares to swap parts around until stuff works. Also try an external keyboard if you have one. There could be a few problems here: logic board, power board, charge card, and/or PMU board...

Probably something on the panel's driver board. Hopefully something simple like a cracked solder joint. Either way the panel likely has to be at least partially disassembled to get at it. Sadly a number of components, especially the driver transistors, are attached flip-chip style directly to...

Normally no. Rule of thumb is: if it's an '030 or older, or has soft power, it probably doesn't need one. Now this isn't a hard-and-fast rule: there are several machines, notably the 6-slot Mac IIs, that won't even power on without good batteries, but generally the older models don't...

Nice. I don't have the tape drive for either of mine, sadly. I still don't understand why these weren't sold as the Power Macintosh 9100. Yet another dumb move from mid-90s Apple as the WGS 9150/120 is unquestionably the most powerful NuBus PPC machine ever made. Anyway if it won't boot make...

The problem with the '040 is that its bus protocol was quite different from the preceding 68k models, requiring the use of GALs and other chips to interface it to the older designs. Motorola even developed a chip that was specifically designed to interface the '040 to an older 68k bus design...

Probably just clean the contacts on both the fan and analog board. Maybe bend the fan's contacts outward slightly if there are still occasional running problems. Other than blowing out dust there isn't much to be done maintenance-wise. Depending on how dusty it is I would do a partial...

Your floppy drive doesn't work? Maybe try repeatedly pressing the tiny switches at the front of the drive to see if it comes alive that way. Sometimes those switches become oxidized and they don't register that a disk is inserted, is writable or read-only, or whether it's DD/HD (depending on...

Two things:   1. You'll need another Mac with a working video system to flash the card. 2. Sometimes the PC version shipped with a flash chip that was too small to hold the Mac BIOS, so if you tried to flash it to Mac it would brick the card. It has been several years since I tried to do this...

Judging by the huge rust stain in the pictures upthread I'm going to guess there's probably some damage to the logic board, likely from damp storage, severely leaked caps, and/or an exploded PRAM battery. I'd probably remove, inspect, and clean the board and case before I continued trying to get...