Search results

Just checked the two power supplies. This is #1, apparently it's Rev. B, date code looks like week 25 of 2001. This one has more Chemi-Con caps (as per the list in my first post) and has the funky fan control board rework. This is #2, Rev. E, week 51 of 2001. So AcBel was going through a...

Thanks guys. Here's where you need to desolder to remove the big heatsink (circled in red) and remove the two screws (circled in white): I took the picture right after reassembling, so those pins haven't been resoldered yet. This is power supply #2, which had a green TEAPO on the fan board...

I'm glad to hear that! Was this a preventative recap or a repair? Aside from the dust, mine looks pretty good inside, and the caps are good brands, so I'm inclined to leave it alone since it's working fine. With R42 being 700k and in series with R41, perhaps they form a (very low current)...

I fell into the "you must recap everything" mentality and did two of these Sony power supplies a couple years ago. What I found was that all of the caps I removed measured good, and none were leaking, so I no longer mess with them. The Sony supplies are high quality. If the voltages are good, I...

Although I have not personally tried them, there are more options for Wifi on OS 9 than the Orinoco/Airport hardware: https://lowendmac.com/2009/wifi-pc-cards-for-powerbooks-running-mac-os-9/

There are a handful of different hardware versions of the SE/30 ROM SIMM, but they all have the same bits on them, AFAIK :)

Thanks to you, I know how filthy and dusty my 7600 power supply was inside...yuck! 🤢 I did not remove R41 from the glue, but I desoldered it and bent its leads away from the edges of the holes so I could measure it out of circuit. I got 838.6 kohms, which is right near the bottom of the range...

Thanks. I wish I had a serial port adapter for the G4. I also have a couple of PCI old world machines, a 7600 and a 5400, along with a PC that could be pressed into service. I'll give your new ROM a try later today.

Color code appears to be red black gold gold, so maybe 2 ohms 5%? I'll verify when I have it opened up again.

One of the supplies had this odd rework on the fan speed control board: The positive leg of that capacitor has been replaced by a resistor, and the positive wire for the fan is attached there instead of at the fan connector where you'd expect it to be. I didn't include that cap in the list...

I recapped a pair of Quicksilver G4 power supplies recently. Just the secondary side; everything south of the transformers. I left the rest alone. Unsurprisingly, some of the TEAPOs were bulging, but didn't appear to have started leaking yet. So far, the recap seems to have really helped the...

I tried the PCI card with your Test1 firmware in my G4. It would not boot to OF or Mac OS with the card installed; just a bong and a black screen forever. I had the monitor connected to a different, known working video card, and the system works fine with the PCI card pulled. I put the PC ROM...

Thanks @joevt, I should've figured you would have a couple Powerbook ROMs stashed already :) I don't have any particular affinity for version 113-XXXXX-119 of the ATY,RageM7 fcode, it's just the one I happened to find a System Profiler screenshot of. It would be interesting to know whether...

@Epictronics, seems like you should be aware of this if you aren't already: https://68kmla.org/bb/index.php?threads/early-macintosh-home-brew-4mb-memory-upgrade-board-development.47308/

Thank you for offering to help! Unfortunately, it's looking trickier than I hoped... I just checked the readme for the ATI ROM dumping and flashing tools from Graphiccelerator, and it says: "Note that on-motherboard graphics cards (iMacs, eMacs, PowerBooks, iBooks) are not supported by the...

Oh wow, that's a blast from the past! I remember using that years ago but had forgotten all about it. Thanks for the suggestion. I was also looking at BOINC, and while the client is still available, unfortunately none of the active projects will provide work units for 32-bit PowerPC :P

I have a few G4 chips I'm trying to find the limits of, so I'm trying to come up with a good stress test, either in OS 9 or X, to confirm that they're stable. Does anyone have a go-to method for this? Maybe a long code compile, encoding a large video, or looping a benchmark utility?

Specifically, I'm looking for the "DVI" model, A1001 (EMC 1913), M8591LL/A or M8592LL/A. These have the ATI Mobility Radeon 7500 GPU. I happened across a PCI card with this chip on it, and I'd like to see whether I can flash it from PC to Mac, so I'm looking for the video ROM from the...

Maybe the service is getting 403'd by Macintosh Garden, like a lot of people are now? They seem to have gotten really aggressive blocking ranges of IP addresses lately.

@herd I had to bust out the 20x eyepieces for my microscope, which I never use. In the process of doing this, I learned they are crap, so I probably won't use them again. Nevertheless, I was able to capture this: I think I see 7 distinct internal layers there. They look like aluminum. None of...