Re: Qbex BookPC and my attempt to repair it

Posted on 2023-03-18, 19:02

by

by weldum

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

sorry, i was a little bit busy the big one is a MOSPEC S20s40C, schottky barrier rectifier, it has no continuity in between legs the small one is a Phillips Semiconductor PHD69N03LT, N channel MOSFET, has continuity in between legs in both components i've tested in every way possible that I know ( …

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Re: ASUS PVI-486AP4 with an 83mhz Pentium Overdrive will no longer post at full speed.

Posted on 2023-03-17, 02:35

by

by weldum

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Horun wrote on 2023-03-17, 02:21: Oh that sounds more like a board failing. Runs ok at 25Mhz but not at 33Mhz ? Had a soc 4 do similar (run ok lower speed clocks but not higher) and was bad caps. i second this, bad caps or maybe a vrm not powerful enough... the pentium overdrive can be quite power …

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Re: Qbex BookPC and my attempt to repair it

Posted on 2023-03-16, 00:35

by

by weldum

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

well, i've lifted the legs in both components, now there's no short to be found maybe now the cpu would not get any power?

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Re: Qbex BookPC and my attempt to repair it

Posted on 2023-03-15, 23:06

by

by weldum

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

okay, i'm gonna do those tests later if 12v went directly to the cpu, it may have killed it...

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Re: Qbex BookPC and my attempt to repair it

Posted on 2023-03-15, 10:46

by

by weldum

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

short but the two are 12v

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Re: Qbex BookPC and my attempt to repair it

Posted on 2023-03-15, 00:00

by

by weldum

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

mother with everything = short mother with cpu = short mother with ram = open mother "empty" = open so, it seems that the short is in the cpu socket or some related component...

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Re: Qbex BookPC and my attempt to repair it

Posted on 2023-03-13, 10:45

by

by weldum

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

yes, it's shorted to ground i have the original processor and ram (celeron 533mhz and 128mb pc100) also i have other celeron/pentium 3 processors for testing and many pc100 and pc133 modules

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Re: Qbex BookPC and my attempt to repair it

Posted on 2023-03-13, 00:40

by

by weldum

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

ground to coil = 0 ohms (no connection) ground to point in the board = short now there are no shorts in between the 12v rail and ground

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Re: Qbex BookPC and my attempt to repair it

Posted on 2023-03-12, 22:59

by

by weldum

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

to ground direct short = 0 ohms to 12v rail = 22.4 ohms but the value goes down slowly over time

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Re: Qbex BookPC and my attempt to repair it

Posted on 2023-03-12, 22:20

by

by weldum

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

yes, the color of the wires are the same as in your picture. as i stated previously, i took out the transformer i'm considering bypassing that part of the psu and feed the voltages directly from a standard atx psu

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Qbex BookPC and my attempt to repair it

Posted on 2023-03-12, 17:16

by

by weldum

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Hi, I have bought a Qbex BookPC which has the PCChips BKi810 V3.3 motherboard. It's the same that's on this review: http://www.dansdata.com/bookpcblack.htm The computer was sold as non-working. Upon further inspection, it seems that the small "PC100" branded PSU failed and killed the motherboard, as …

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Re: DOS performance on a Pentium 4 vs new Pentium N3710

Posted on 2023-02-14, 00:53

by

by weldum

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

it should be faster, however these newer N series pentium uses a different core than the ones found for desktop machines so performance is way different some celeron and pentium are the same as the atom but with more cores, more cache and in some cases, better I/O and memory controller. they …

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Re: Looking for a Windows 10 compatible sound driver for an old motherboard

Posted on 2023-01-26, 04:57

by

by weldum

in Milliways

in Milliways

the generic drivers from the sound chip manufacturer page works fine http://download.viatech.com/en/support/driversSelect.jsp you have to set : Microsoft Windows Windows 8/8.1 Audio VIA Vinyl Audio Codecs and download the version 10.1200 which is compatible with Windows XP all the way up to Windows …

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Re: 478 vs 775 insurrection

Posted on 2022-10-09, 16:00

by

by weldum

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

0. 478 boards with isa? I've seen a few but these are industrial ones and may not be very compatible with soundcards in dos, you have to take in account if the soundcard needs - 12v (i think) as some atx psu don't have that. 1. the clamping system used to attach the heatsink relies on plastics that …

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Re: 478 vs 775 insurrection

Posted on 2022-10-07, 02:05

by

by weldum

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

some things that may have been said before: -S478: you can find motherboards with sata and even pci-express, still DDR1 though hyperthreading/muticore is entirely useless in 9x OS'es as they only use the first core/thread. -s775 with agp: there are some boards that can use c2d processors (one board …

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Re: Apple QuickDraw 3D Accelerator Card

Posted on 2022-05-25, 21:52

by

by weldum

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

So Classic environment is allow 68k and PPC software to work on Mac OS X (PPC based)? With out RAVE, GLIDE, OPENGL Rosetta allows Mac OS X PPC based software to run on Mac OS X Intel CPU? The Mac OS 9 running on PPC executes 68k apps directly? much newer MAC's ARM based is not support OpenGL, and …

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Re: Weird texture issues in Half Life (WON) on Windows 98SE with Geforce cards

Posted on 2022-05-06, 01:47

by

by weldum

in Marvin \ Software

in Marvin \ Software

i think it's the driver that's causing that issue i think in vogons drivers are some older versions that can be useful from what i remember, later drivers are problematic in windows 9x, 45.23 is a very good one

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Re: 3dfx SLI vs nVidia SLI - Why doesn't nVidia do it like 3dfx?

Posted on 2022-04-16, 01:14

by

by weldum

in Milliways

in Milliways

I miss SLI. I mean, i never partook in it myself with modern GPUs because of how expensive it was. But i always liked the look of 2 beefy cards in a system and performance seemed to scale pretty well if the game developer actually bothered to optimize for it. It was the dream growing up. Now its …

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Re: Windows 8.1 GUI question

Posted on 2022-03-20, 22:46

by

by weldum

in Marvin \ Software

in Marvin \ Software

chrismeyer6 wrote on 2022-03-20, 22:40: Technically 8.1 has untill January 10th 2023 before all support is killed yeah that's from Microsoft, but driver support from both amd and Nvidia ended a time ago, intel too i think as such, software support i think is limited

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Re: Windows 8.1 GUI question

Posted on 2022-03-20, 21:20

by

by weldum

in Marvin \ Software

in Marvin \ Software

why wont you use windows 7 instead? windows 8.1 support got killed way before windows 7 one, and almost everything runs the same or better on 7

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