• Updated 2023-07-12: Hello, Guest! Welcome back, and be sure to check out this follow-up post about our outage a week or so ago.

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  1. macosten

    Quadra 950 PSU pains

    No; there was no point in time when the stock PSU and the bad RAM were both installed at the same time. I figured I'd do both things at once... you'd think I'd know that I should only change one thing at a time by now.  I realize now I didn't make clear in my earlier post. In my defense, I...
  2. macosten

    Quadra 950 PSU pains

    Alright, so what I've ended up doing is rewiring a PC power supply to match the Quadra's power. At first, I wasn't getting it to work... but it turns out that was because the brand-new RAM I ordered was messing it up. When it was in Bank 1, the machine didn't chime, and when it was in Bank 4, it...
  3. macosten

    My quest to see video output

    Make sure you're restarting after each time you change the switch settings. If you just so happen to have the same kind of adapter as I do, try turning on 2, 3, 6, and 7, and then applying power. That's what worked for me (check the reviews for other suggestions).
  4. macosten

    Quadra 950 PSU pains

    The fuse is intact.
  5. macosten

    Quadra 950 PSU pains

    Just tried this again, just to be sure; I checked to make sure nothing conductive was under the board, made sure all the pins were normal, I removed all the RAM and replaced it with one bank of brand-new modules in Bank A, I removed the NuBus card it came with, tried with and without the VRAM...
  6. macosten

    Quadra 950 PSU pains

    So, I recently got a Quadra 950 and had it shipped to me. Naturally, it was working, but shipping happened, and it's acting up a bit now. I've surmised that it has a problem similar to that described in this post. If I let it sit, then try turning it on with soft power immediately after...
  7. macosten

    Macintosh TV Recap Issue

    Yep, that's one of the trollish things about these capacitors.  An electrolytic's stripes are negative, and a tantalum's stripes are positive.  Let this be a lesson to all who wander over here :p You could say that this was a ...shocking experience? ;) Or perhaps it was... enlightening...
  8. macosten

    520c: Help Needed

    Alright. Luckily I used duct tape to seal my bodgework so while it looks like a growth it does work (for the time being) and I can just take the tape off to reverse it. Do you suggest I just dremel the PSU brick open, or should I still try getting it apart with a flathead screwdriver (despite...
  9. macosten

    520c: Help Needed

    Update! I opened up my charger and swapped pins 1 and 2 (they were the red and orange wires in my charger). The computer now works, but I assume the battery will no longer charge. This confirms TechKnight's assessment (and what tjjq said from the beginning ;p ). So now I've got to just recap...
  10. macosten

    520c: Help Needed

    I've got a battery I've recelled, and it works, though the computer won't boot off it (especially now that I removed the PRAM battery :p ). Will the battery charge at all off the 2.1V VMain? I assume it'd be slow as heck if it did, but since I'm not the greatest electrical engineer (aspiring...
  11. macosten

    520c: Help Needed

    There's an interesting suggestion. :O So I guess that might be a temporary fix (it'll make the battery slow to charge, if it charges at all, though, I think?). Would there be a way to take the plug from the PSU and hook it up to a more generic power supply and get it to work? Maybe there's a...
  12. macosten

    520c: Help Needed

    I briefly tried, and it splintered a bit...  Any suggestions for replacements? Which caps should be recapped, or (if I steal the plug off the end) are there any other known supplies I can just splice the plug onto and get it to work? Edit: the computer should still work, right? Is it likely...
  13. macosten

    520c: Help Needed

    Alright, I've got the multimeter! ...I stuck wires into pins 1, 2, and 3 (not all at the same time - don't wanna cross anything). From 1 to 3, the current is 16.5 V... but from 2 to 3, it's only around 2.1 V. Something tells me that might be part of (if not most of) my problem, huh? Well...
  14. macosten

    520c: Help Needed

    Don't want to, but I'm willing to. :p I'll poke it with a multimeter tonight, either way.
  15. macosten

    520c: Help Needed

    Won't be able to get ahold of one until tomorrow night; that's why I ask. Evidently, there are two ground pins and to 16V pins, one at 1.5A and one at 1.0A. I remember seeing this info somewhere else on these forums.
  16. macosten

    520c: Help Needed

    Are there any generic replacement Power Apaters that would work with this computer, by any chance?
  17. macosten

    520c: Help Needed

    It was working before the computer shut down. I'll just have to test it tomorrow night when I get the chance, I suppose.
  18. macosten

    520c: Help Needed

    Well, I do have the plastic parts for this one. I'll wait to see if there's anything else to be done for this one yet, but if I somehow managed to brick this computer by just a key combination then I suppose I can try buying/trading for yours. :p The EHC (where all the electrical testing...
  19. macosten

    520c: Help Needed

    No dice so far. Not sure what's up. I tried reseating the keyboard a couple of times, too, but the thing just isn't booting. It's as if I'm not doing anything. Using an external keyboard... well, not like it worked when the machine worked, but it still doesn't work. What could be up? What...
  20. macosten

    520c: Help Needed

    Alright, the computer has been disassembled; the Backup Battery is out. It's a dinky-looking thing. Question: how long do I keep it out of the computer for? Should I even put it back yet? It didn't work when it was in the computer so I'm inclined to believe the answer is "no"... but will it...
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