Re: GeForce3 woes

Posted on 2021-06-02, 19:59

by

by quicknick

in Marvin \ Video

in Marvin \ Video

@candle_86, @2Mourty - thanks, but I'll pass. Already have a hell of a fight on my hands with the above-mentioned GF3, another one from Abit and a FX5900XT, and so far the artifacts are winning :D Seeing there are differences in passive components between different memory brands, I'll attempt …

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Re: PS/2 Ports Dead (Again, Different MB)

Posted on 2021-05-18, 23:12

by

by quicknick

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I saw that, but I'm not sure its the same issue. I got power to the mouse, and my USB keyboard work fine. I think someone stated that the capacitor is shorting the +5v to ground, but IMO it's more likely that either Clock or Data are affected (shorted or pulled to GND or +5V, or even between …

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Re: PS/2 Ports Dead (Again, Different MB)

Posted on 2021-05-18, 10:07

by

by quicknick

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Search the forum for "asus c151" and you'll find plenty of threads. It's a capacitor array that sometimes go short-circuit thus killing the PS2 ports. Apparently the solution is to remove it. P3B-F PS/2 ports stopped working

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Re: Help needed reviving AST 486 motherboards

Posted on 2021-05-11, 15:45

by

by quicknick

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Oh man, I'm so sorry, I cannot imagine how I forgot about this :( If it's of any help, here are the photos: https://imgur.com/a/og1N9On There are 4 patch wires on my board, two on the back and two on the front. Only one is in the video area. I've attached close-ups of those, and can provide …

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Re: GeForce3 woes

Posted on 2021-05-08, 09:59

by

by quicknick

in Marvin \ Video

in Marvin \ Video

Sorry, a mistake by my side. Have not used this PC for several week's. It has also 64 MByte video ram only. No worries :) Thank you for the pics, I already spotted something different: all the resistor networks and half of the discrete resistors are 0 ohm on your board instead of 15 ohm. I think …

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Re: GeForce3 woes

Posted on 2021-05-07, 23:43

by

by quicknick

in Marvin \ Video

in Marvin \ Video

Thank you for the suggestions. @melbar - can you please upload some photos of the back of the board so I can check if there are differences in (un)populated SMDs between the 64M and 128M versions?

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Re: Good cooling solution for older GPU’s?

Posted on 2021-05-07, 01:01

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by quicknick

in Marvin \ Video

in Marvin \ Video

For older and not very power-hungry chips I'm using Sekisui #5760 double adhesive thermal tape. Ordered a couple of years ago from ebay so can't be 100% certain that it's genuine, but seems to be holding (and transfering heat) very well. And you've just reminded me that I only have about a quarter …

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GeForce3 woes

Posted on 2021-05-07, 00:56

by

by quicknick

in Marvin \ Video

in Marvin \ Video

TL-DR version: is it possible to replace the memory on a GeForce3 with 2Mx16x4 chips instead of the original 1Mx16x4 ones? Not trying to upgrade to 128MB (although I wouldn't mind :) ), but because I don't have others available. If not possible, what other cards are more compatible donors? Long and …

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Re: Microsoft PS/2 to serial pinout?

Posted on 2021-04-26, 10:16

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by quicknick

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I'd be really interested in you managing to re-check your work on this, given that the PS/2 specification has pins 2 and 6 as N/C (not connected). You appear to have PS2_2 attached to DB9_2, perhaps this was PS2_1 in reality? I'm also (still) interested in the complete schematic of the "68666" …

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Re: Replace Low ESR Electrolytic KZJ Cap with a polymer or similar NOS electrolytic ?

Posted on 2021-04-05, 23:36

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by quicknick

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Search their datasheets if they are from a reputable brand. If they're not, Panasonic FR series never failed me when it came to re-capping power supplies. Generally speaking, the caps in the primary side are general-purpose ones and secondary side are low-ESR but not ultra-low like those on …

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Re: The bet. Can a card in this state be repaired?

Posted on 2021-03-26, 13:05

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by quicknick

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Congrats, man, I know how hard this is! And the board deserves an award for worst possible battery placement 😁

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Re: Old MSI MS-6117 SLOT 1 dead. Do you have any Idea ?

Posted on 2021-03-17, 17:50

by

by quicknick

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

1. Dead CPU 2. CPU held under reset. Unfortunately your diagnostics card seems useless from this point of view, so you either source a better one (the one with 8 LEDs, if it's still available) or study the PII/PIII datasheets to locate the reset pin, and what state it should have for the CPU to run …

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Re: Old MSI MS-6117 SLOT 1 dead. Do you have any Idea ?

Posted on 2021-03-16, 20:34

by

by quicknick

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Not familiar with this model. Is that the one that's prone to blow up your board if you use it on the ISA slots because that part is too short and it's a loose fit? (please don't try :D ) Is one of those LEDs labeled "reset"? If so, it should light briefly when you apply power and then go dark. Does …

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Re: AT motherboard ATX PSU with AT attachment?

Posted on 2021-03-16, 20:28

by

by quicknick

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Also, to add even more confusion: there is another earlier connector of the same type which was used to "extend" AT power supplies by adding a 3.3V line, sort of like a "proto-ATX". But that one is slightly different from yours, as it had only +3.3V (no red +5V wire) and it's not part of the ATX …

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Re: Old MSI MS-6117 SLOT 1 dead. Do you have any Idea ?

Posted on 2021-03-16, 20:07

by

by quicknick

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Does the Reset led on your diagnostic board turn off shortly after power-up? Cold CPU might mean it's stuck in reset.

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Re: How hot should an 8087 FPU be at idle? I'm getting 55-60 deg C... And other 8087 questions

Posted on 2021-02-21, 13:03

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by quicknick

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Hi Jed118! Back in '94 I added a 8087 to my XT clone, I think it didn't get to execute at least one instruction - I had no software that would use it, not even a test program or benchmark, so I guess it qualifies at the most pointless upgrade ever. But I remember it running (idling, better said) …

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Re: Pentium on a 386 motherboard ( sort of)

Posted on 2021-02-20, 21:50

by

by quicknick

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Next step: insert another PGA237 socket between the PODP and the PGA169, connect all appropriate pins to VCC and GND, set bus to 33MHz, enjoy! 😀

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Re: Faulty S3 805 VLB video card

Posted on 2021-02-18, 12:21

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by quicknick

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Also check the 14.318MHz crystal while you're at it, and maybe replace the decoupling caps with some of higher quality.

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Re: Motherboard ID and troubleshoot

Posted on 2021-02-15, 00:03

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by quicknick

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Glad to report a success, I'm deeply grateful for the assistance! Went straight to the 2.1A bios from UH19, everything works now. This bios presents two options that I don't remember seeing on other SS7 boards: POWER ON Function [Button Only/Keyboard 98/Password/Mouse Left/Mouse Right] KBC input …

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Re: Motherboard ID and troubleshoot

Posted on 2021-02-14, 21:32

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by quicknick

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

At first I tried with the few sticks I had at hand, but in the end got my boxes out and tried about a dozen memory configurations (matched EDO and FPM pairs, SDRAM sticks from 32 to 256MB, PC66 to PC133), to no avail. Then, following my hunch about the BIOS, I tried with a Soyo 5EHM image, and it …

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