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Re: ATX PSUs with a single AT power connector?

Posted on 2024-04-02, 13:27

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Here's something more important to note: if the PSU has a 6-pin Aux. connector, it's probably old enough that the caps inside it should be checked - visually, at the very least. Yes both of the PSUs I have with this AUX connector are roughly P4 era. An Antec one and a Turbo Link brand one. Both are …

Re: ATX PSU - wiring power LED

Posted on 2024-04-02, 12:58

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

15 years aren't that old for LEDs. I remember buying quite a few (mostly "standard" 5 mm and 3 mm ones) back in the early 2000's from Radio Shack (in the US) and they all still light up quite well. By old LED's, I meant mid-90's and older... so 30+ years old.

Re: Computer Won't Turn On

Posted on 2024-04-02, 12:38

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

So the old PSUs click continuously while connected the the motherboard and power outlet but not when connected the just the outlet. I did however still try the test...with no success. Hmmm.. OK, so it does look like something might be shorted on the motherboard. I do have on however my knowledge on …

Re: What retro activity did you get up to today?

Posted on 2024-04-02, 08:49

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I tested the Radeon 9700 I got by surprise the other day, and well...oh you Radeon 9700/9800, always killing yourself! I tried pressing on the memory modules, the patterns don't change...so it's back to the seller. It's almost always the GPU chip that's the problem on these. Pressing on the mem …

Re: Fast / quiet / cool AGP graphics card

Posted on 2024-04-02, 08:00

in Marvin \ Video

in Marvin \ Video

Like Rawrl, I was also going to mention that you check the capacitors in the system (motherboard and power supply), since indeed these systems are well-known for this issue... but he beat me to it already. If unsure what you are looking for, just take a few photos of the motherboard and the power …

Re: ATX PSU - wiring power LED

Posted on 2024-03-24, 23:16

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

It happens. :D BTW, you might want to swap that 47 (or 56?) Ohm resistor with something of higher value. Even with a white or blue or violet LED (typical voltage drop of ~ 3V), such low-value resistor could still allow up to 10 mA of current, depending on how low the LED starts to conduct. With that …

Re: The keyboard stops working after minute or so.

Posted on 2024-03-24, 23:08

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

More stuff plugged in = quicker crash? Hmm... maybe time to try a different PSU, just to rule that out too.

Re: Computer Won't Turn On

Posted on 2024-03-24, 23:03

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Clicking and PSU not wanting to start definitely suggests a short-circuit somewhere. HOWEVER, there might be an exception in the case of this particular motherboard. But let's confirm if so by the following test: - When you try to power up the motherboard via the On/Off switch on the computer and …

Re: Fujitsu DL900 power supply voltages

Posted on 2024-03-24, 22:40

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

OK, using the above photo as a reference, the left-side column of pins is the primary side of the transformer. First and 2nd pin from the top are for the primary main winding. On the transformer itself, these two pins should measure pretty low resistance to each other and no resistance / continuity …

Re: Logic Concept LC-B300ATX 5Vsb too high, not starting

Posted on 2024-03-21, 17:20

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

There's going to be a small 50V 47 uF (IIRC) cap on the secondary, near the 5VSB transformer (the "EEL-19-2005" one). Make sure that one is good too. That's the secondary side aux. rail that supplies power to the 2005 PWM IC as well as the BJT driver circuit. If that checks out, check all of the …

Re: Bent PCI shields and best way to fix them

Posted on 2024-03-21, 13:56

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Whenever I get graphics cards with bent I/O shields, I take off the shield and depending on the damage, either straighten it out with pliers or bang it with a hammer on a flat surface to flatten it out again. *EDIT* Pretty much just said what weedeee said above 😁

Re: Logic Concept LC-B300ATX 5Vsb too high, not starting

Posted on 2024-03-21, 13:33

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

That's a Deer / Solytech power supply. The "LC" series are pretty much the lowest end units... though yours actually looks much better built than the others. Anyways, I'll continue on this point later below. Now for the high 5VSB... WARNING: DO NOT CONNECT THIS POWER SUPPLY TO A MOTHERBOARD YET / …

Re: Fujitsu DL900 power supply voltages

Posted on 2024-03-21, 13:04

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

OK, I did a search for a "Fujitsu DL1200 power supply" on ebay, and indeed the outputs are 34V and 5V. In particular, this is the order of the output pins from bottom to top when using the picture you posted as a reference and information found from eBay listing: +34V, SG2, SG1, 5V, PW/ST I'm not …

Re: Asrock 775Dual VSTA & Core4Dual thread

Posted on 2024-03-19, 22:52

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Not sure why you would want to browse modern internet on anemic quad core CPU with 3 Gb RAM tops. Still an awful experience. And my comment was brought to you here on a stock-clocked (1.8 GHz) Phenom x4 9150E LOL LOL LOL ^ on a Windows 7 system with 4 GB of RAM, 160 GB HDD, and onboard HD3200 IGP …

Re: Fast / quiet / cool AGP graphics card

Posted on 2024-03-19, 22:26

in Marvin \ Video

in Marvin \ Video

Take ATi X800XL AGP or Nvidia 7600GT B1 AGP? Ah, thanks for pointing it out: the ATI x800 "GTO" I mentioned in my post above is indeed an x800XL with an R430 core (and branded by Sapphire.) And indeed it seems to run rather cool... though I have yet to verify if its onboard sensor is reporting …

Re: PSU for old HP Pavilion Desktop

Posted on 2024-03-19, 21:46

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Sorry, perhaps I should have been a little more specific: what I meant to say applies mostly to regular desktop (tower, SFF, and USFF) machines. Workstations have always been a little different from both and indeed rarely used standard ATX pinout (be it because of dual and/or high-power CPU support, …

Re: PSU for old HP Pavilion Desktop

Posted on 2024-03-19, 13:41

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

For both HP and Dell: if the motherboard is new enough to have PCI-E, it's pretty much guaranteed the ATX connector is standard pinout. At least I haven't see one that isn't so far, and I've worked on quite a few OEM machines back in the mid-late 2000's. That being said, the motherboard is new …

Re: Fast / quiet / cool AGP graphics card

Posted on 2024-03-19, 00:41

in Marvin \ Video

in Marvin \ Video

I have many of the mentioned video cards in this thread and have done extensive temperature tests on pretty much all of them (it was a hardcore geeky hobby of mine a few years ago and still is to a point.) My GeForce 7300 GT and 7600 GS cards are the best, by far, when it comes to decently low …

Re: ASUS AGP-V3000ZX (RIVIA 128ZX) reballing and missing components

Posted on 2024-03-18, 18:17

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Perhaps a silly question, but why was this video card getting re-balled in the first place? If it's because of artifacts , forget it - despite running hot, these old GPU won't run hot enough to crack the solder on the BGA package over time. And the GPU chip itself uses die bonding wires rather than …

Re: Fujitsu DL900 power supply voltages

Posted on 2024-03-18, 17:55

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I'm no good when it comes to finding schematics. However, gonna post here here in case this turns into a PSU troubleshooting discussion, since I do have experience repairing SMPSes. Indeed on more modern printers (>2000's), 24V is what is used for motors (some inkjet HP's even use 32V adapters... …

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