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  1. I thought there was an internal filter that sat between the 50-pin cable and the logic board AND the internal/single drive has to either have internal terminator or term at the end of the chain as usual? Or SCSI urban legends? I have a black terminator on my external AppleCD and an internal SCA drive that doesn’t appear to need it.
  2. Well, seeing as the ROM itself is electrically compatible between IIci, IIsi, IIfx, SE/30 and the Quadras, I think it’s safe to plug in without a fire, but then you have the matter of connecting to the stock oscillator. That’s the part that probably won’t work. And even for me in my Quadras, I never got it to chime, either the VSO or thr PowerPump.
  3. I thought maybe Newer Technology was the supplier but Spectrum was the manufacturer... for example, you might see a DATECS mobile printer made in Bulgaria that’s actually remarketed and sold under different names (depending on who holds the license in that country, like Infinite Peripherals in the US for the printer example) I’m telling you, that looks like my VSO (Q700/900). I’m on a plane ATM but I think I may have posted about it here, or perhaps I can pull my eBay purchase history. EDIT: Here it is: https://www.ebay.com/itm/Velocidad-variable-de-tecnologias-mas-recientes-Overdrive-Para-Quadra-700-900-/162396084032?_ul=BO&nma=true&si=2iYfWw2PcJoWgcPfrtBw%2B3eafDg%3D&orig_cvip=true&nordt=true&rt=nc&_trksid=p2047675.l2557
  4. pb3623

    My quest is at an end

    As an SGI O2 owner, can definitely agree. Almost like this SE/30 was in a (successful) design shop that had these as commodities, thus individuals were allowed to do what they wished to them.
  5. Funny, I’ve never seen anything branded (as far as accelerators) by Newer Technology. But I’m virtually certain it’s a Variable Speed Overdrive, which is a little more complex than the ROM SIMM for the PowerPump, which I think only serves to synthesize the new clock signal for the OE pin. I’m out of town so I can’t take pictures of both of mine (not that either work); I spent quite a bit of time trying to research online (Wayback) and see exactly what these pieces were.
  6. Virtually certain that's a Newer Technology PowerPump or Variable Speed Overdrive, but I didn't know they made them for the IIfx. I have one for a Q950 and another for a Q700/900. The ROM connects to pin 1 (IIRC) of the stock oscillator (Output Enable) and alters the clock speed. For the Quadra, the PowerPump includes a NuBus card that powers a fan that connects to the PPC 601 card... The VSO is only the single piece (ROM SIMM) but both come with a utility/cdev that let you dial up/down the clock speed. The PowerPump NuBus card has a panic button in case the speed is too high and the system won't boot.
  7. Yeah, that explains it - boy, do I feel silly. I should have caught that when I typed diode. But, in my defense, no - the LED doesn't light up so it wasn't obvious to me what this way, besides looking very similar to the cap next to it.
  8. @david__schmidt I'm positive the card's correctly oriented. There's an arrow that points to the front of the card/IIgs case. @cruff My comment on the 47uF's were related to the logic board. I agree using them on a card of this size would be overkill, electrically and physically! All, I took some close-up pictures of the upper-right quadrant of the card, particularly where the heat builds up. I took note of component D1, which appears to be small capacitor (is it a diode?) but it almost appears chipped. (i.e., the top of the diode isn't flat). I tried to capture it as best I could. All other components appear visually intact. Perhaps the card just went bad. I'd rather try and fix it (w/ or w/o the Byteboosters' help) but, if that doesn't pan out, at least I'm confident the board itself (and the new PSU) appear to be good. https://imgur.com/a/I5k9zTc
  9. Would a video help? Just to make sure I'm describing the sound correctly as a chirp? What would be the test points on the board and card that I would need to probe? There isn't any visual short - no whiskers on the solder joints, no errant solder paste, no loose traces. I can tell you the front of the RAM card (particularly the jumpers you're not support to do anything with - that were used for factory production) gets real hot so I'd guess you're right and one of the ICs is overheating?
  10. As another data point, I ran the self-test (Ctrl-Open-Closed-Reset or whatever equivalent in my AEK II) and got the following: (SYSTEM BAD 09010001) which i I believe can be traced to (among other things) insufficient voltage.this after I took apart and cleaned the board (and I have that upgraded PSU). @Gorgonops I have the serial card because it came with it. I have two FDs. The seller told me he prefers to connect one drove to each port, rather than daisy-chain. Guess that’s not true!
  11. I'll need to check tonight! No, I hadn't recapped it yet and hadn't considered that a high priority since the RAM card did work at one point, and when it ceased to work I immediately blamed the stock PSU. Any one in particular I should start looking at, on the off change it's a 47uF that I have as spares? Big green = Nvidia? It's been a while since I heard it called that (when I was in a PC build phase) I've no problem giving him my business if I can narrow down root causes and show it's the ByteBoosters card, just having spent about $200 on parts in the last month. Makes sense about the caps, though - more RAM equals more voltage. I don't even get a lit LED. Should I be turning my multimeter on the expansion slot?
  12. So in between working on our A/UX imaging project, trying to work through some Q950 issues and (on the side) my new SGI O2... I have a IIgs that I got in trade about six months ago that’s pretty much sat the whole time. It’s a ROM 01 unit. MicroDrive CF card w/ 512 MB CF ByteBoosters 4 MB RAM expansion card serial card I clipped the PRAM battery and got the alligator clip battery pack to replace it I bought an upgraded PSU from ReActiveMicro and that got installed last week I bought the Spanish HD15-to-SCART cable, a SCART-to-HDMI upscaler and an HDMI-DVI cable that doesn’t appear to pass the signal Main issue is this: with the RAM expansion card installed (yes, it’s pointed in the correct direction), there’s a high-pitch, almost CRT whine from the PSU and the screen is filled with inverse @@@@@@@@@@@@ (like it does briefly on power-up before POST). Without the card, it boots so in my mind, it’s the card or the (original) caps on the logic board. I remember it starting up when I first got it, enough to see it worked (connected to composite). There’s only apparently 256KB on the board so I’d love to see if the RAM card can be salvaged! Thanks!
  13. pb3623

    Quadra 950 PSU died... <cry>

    Yeoman's work. I enjoyed reading your walkthrough and am assessing my ability to grab an ATX PSU and try it myself. When do you expect to be able to start whittling down your to-do list? the PCB to continue using the (up to 4) 4-pin power connectors? the soft-power circuit a temperature fan speed controller (optional) internal 5¼” power-connectors for solder-free connection to the external 4pin connectors. And a pair of dumb questions: 1) is there a decrease in power consumption at the plug in moving to a more modern PSU? Therefore, wisdom in proactively rebuilding working units? 2) did you replace the fan while you had everything opened up and is there a noise difference? Thanks!
  14. pb3623

    Two SE/30 motherboards in need of repair

    God, what an ordeal. You have much, much more patience than I... I would have been conscious of the PayPal money-back guarantee/dispute window and (if needed) bank/credit card policy... giving the seller a reasonable amount of time to at least respond and be on notice before pulling the trigger on the refund (yes, you'd still be out the cost/value of the boards). I know that's not the intended focus of the thread but I'm sure it will draw a lot of attention since there is a pretty vibrant marketplace on this site that relies on good, honest transactions. It tells me I'm doing the right thing by ALWAYS sending money via PayPal as "Goods & Services" and never "Friends & Family" - I'll gladly throw in a couple of bucks to cover the fees if that's the sticking point but it's just not worth it to throw away my dispute rights if this is the one deal that goes sour. About a year ago I sold an SE/30 (well, traded) that was in need of a recap... easy to say now but I would have given that to you for the cost of shipping. Maybe someone with a spare/bad SE/30 board would be willing to do the same? Sure, you'd still be out one board and you'd have to recap the one (which you seem to be comfortable with) but at least you'd have SOMETHING to show for this debacle.
  15. pb3623

    Modern PSU for the SE/30

    The horizontal lines by themselves don’t seem to be a problem. I was using a ROM-inator in my SE/30 to bypass the memory check and ended up swapping out that code for the Turbo 040 driver (since I couldn’t figure out how to get both). The first think I noticed was the horizontal lines and wow, they stayed there for what seemed like forever. I figured out that it was linked to the memory check and this machine has 128 MB RAM so it took about 3-4 minutes. Anyway, I read somewhere that you could bypass the check by holding down the mouse button when you power-on? I had never heard that but sure enough, it works. TL;DR - do the stripes go away if you leave it alone for a few minutes?