VOGONS


First post, by tomoya97

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So a couple of years ago I got a deal on a Slot A 900MHz Athlon (Thunderbird core), Asus K7M Motherboard (HP OEM version) and 128MB PC100 RAM combo. The system was fairly stable under Windows 2000 and a SIS 6326 AGP video card, only crashing when trying to visit some modern websites, such as Facebook, last weekend I decided to move to Windows 98 SE (After a year of not using it at all) and added a 3DFX Voodoo3 1000 (AGP), and this is when the problems began, Windows would fail to detect my Optical Drive (Standard IDE ATAPI CD-ROM), even after installing the latest VIA drivers (both the BIOS and the 98 boot disk would detect it without any problem), both the IDE controllers and the PnP BIOS Extension have exclamation marks in the device manager (Code 10 and Code 2), and it always fails to shutdown, although there was this random time when everything worked flawlessly. GPU and CPU intensive tasks, such as games and benchmarks work flawlessly, no artifacts, no weird glitches, slowdowns, random crashes, etc... Yesterday it failed to boot for the first time, no video signal, beep code, floppy drive or HDD activity, nothing. I remove all expansion cards and storage devices, leaving just the CPU, GPU and RAM, tried other RAM modules and slots (It would give me the typical beep code if no RAM was installed), resit everything, tried my old video card, another monitor, another PSU, nothing. Then out of nowhere it booted just like normal, I reinstalled my Voodoo3, it failed to boot, power cycled once, and it booted flawlessly, added my storage devices and sound card, it failed to boot again, power cycled twice, it booted again. Now I need to power cycle it at least 4 or 5 times to make it boot (regardless of what video card I'm using), and after that I need to power cycle it AGAIN because it always freezes after detecting the IDE drives. I suspect that there's something wrong with the Southbridge, since the PCI slots were finicky from day one.

Last edited by tomoya97 on 2018-03-31, 16:04. Edited 1 time in total.

Reply 1 of 16, by brostenen

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Sounds pretty much like the caps are the first thing to attend.

Don't eat stuff off a 15 year old never cleaned cpu cooler.
Those cakes make you sick....

My blog: http://to9xct.blogspot.dk
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Reply 3 of 16, by tomoya97

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brostenen wrote:

Sounds pretty much like the caps are the first thing to attend.

Well, they have yet to leak or bulge, I am aware that not all capacitors do this when dying, but wouldn't that make the system unstable under high loads?

Reply 4 of 16, by tomoya97

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TOBOR wrote:

To the OP, what PSU are you using with the board? These slot A mobos are very 5+ volt hungry.

It's a 250w EVER (?) one from the early 2000's (FSP250-61GT), the 5v rail seems to be capable of delivering 25A

Reply 5 of 16, by TOBOR

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Lots of photos of the motherboard and other hardware would be of some help here. Power supplies from that era are always suspect because of bad caps. 250 watts seems marginal anyway. That PSU could handle PIII ok but Athlon K7 could be too much for it.

If the truth hurts, tough shit.

Reply 7 of 16, by tomoya97

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TOBOR wrote:

You said that you had Windows 2000 installed and it ran stable. Did you wipe the HDD before installing 98 or did you just install 98 on top of W2K?

I wiped the HDD, used it on another computer and wiped it again (twice since apparently the Windows ME boot disk dislikes Fat32 partitions created with GParted). Is there a site where I can look for the power requirements for retro PC stuff?

Reply 8 of 16, by brostenen

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tomoya97 wrote:
brostenen wrote:

Sounds pretty much like the caps are the first thing to attend.

Well, they have yet to leak or bulge, I am aware that not all capacitors do this when dying, but wouldn't that make the system unstable under high loads?

True that. It is not always the case that they bulge, when dead. They can leak from the bottom, and not bulge.

As a few other members have mentioned, then take a look at the PSU inside. You know, caps as well.

25a on the 5volt, seems a bit low. If you happen to stumble on a PSU that delivers 30 to 35 amps on the 5volt, then test with that. You know. Just in case.

Don't eat stuff off a 15 year old never cleaned cpu cooler.
Those cakes make you sick....

My blog: http://to9xct.blogspot.dk
My YouTube: https://www.youtube.com/user/brostenen

001100 010010 011110 100001 101101 110011

Reply 9 of 16, by TOBOR

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tomoya97 wrote:
TOBOR wrote:

You said that you had Windows 2000 installed and it ran stable. Did you wipe the HDD before installing 98 or did you just install 98 on top of W2K?

I wiped the HDD, used it on another computer and wiped it again (twice since apparently the Windows ME boot disk dislikes Fat32 partitions created with GParted). Is there a site where I can look for the power requirements for retro PC stuff?

You have to consider both +3.3V and +5V rails combined for the total rated watts out. That athlon slotA cpu will draw about 8 to 10 amps from the +5v rail when fully loaded (overclocked would mean more current). Assuming the psu has good caps you might need more power on the 5 and 3.3V rails. Try 300+ watt psu to rule out a power issue.

If the truth hurts, tough shit.

Reply 10 of 16, by tomoya97

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Remember how I said that the PC was stable once it finally booted (Did I?)? Well, I think screwed up my W98 installation, either that or I damaged another component (Maybe the PSU?), the CPU usage will go up to 100% by just standing on the desktop doing nothing, it will fail to install anything (Damaged installation file) and Afterdark's Flying Toasters screen saver renders at like 2 FPS

Reply 11 of 16, by TOBOR

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tomoya97 wrote:
Remember how I said that the PC was stable once it finally booted (Did I?)? Well, I think screwed up my W98 installation, either […]
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IMG_20180401_035134389.jpg
IMG_20180401_035609428.jpg

Remember how I said that the PC was stable once it finally booted (Did I?)? Well, I think screwed up my W98 installation, either that or I damaged another component (Maybe the PSU?), the CPU usage will go up to 100% by just standing on the desktop doing nothing, it will fail to install anything (Damaged installation file) and Afterdark's Flying Toasters screen saver renders at like 2 FPS

The motherboard caps look good. Open the PSU and show it.

If the truth hurts, tough shit.

Reply 12 of 16, by tomoya97

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Reply 13 of 16, by tomoya97

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TOBOR wrote:

The motherboard caps look good. Open the PSU and show it.

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Reply 14 of 16, by elod

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Fuhhju caps are bad but they usually vent. Before doing the recap that will surely help that PSU (if it's indeed an FSP) try another one.

Reply 15 of 16, by gdjacobs

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It's more common for Fuhjyyu caps to have failed without external indication rather than lasting any length of time.

All hail the Great Capacitor Brand Finder

Reply 16 of 16, by chinny22

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If even windows sitting idle in the desktop causes problems you could try removing all the hardware again, reinstall windows and see if it still has problems.
If you do then you know for sure its most likely motherboard/ram/psu.
I'd agree with everyone else though, sounds like classic problem caused by bad caps