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Abit ST6 - Restoration - Stuck in reset

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First post, by zuldan

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I'm trying to bring back this ST6 back to life. When I push the power button, it has zero signs of life (post card does not power on) other than the motherboards little red LED turning on. The thermal cam can see some components warm up a bit (32c etc) but they all look normal. There are no shorts on 12v, 5v and 3v. I found some broken traces under the board which have now been fixed. The board was harvested for some resistors in the picture attached. I guess the previous owner assumed it was dead (probably because of the broken traces) and decided it to be a donor. If anyone is able to provide a high res image of this area of the board I would be very grateful.

The attachment IMG_20251213_170451.jpg is no longer available
Last edited by zuldan on 2025-12-13, 23:11. Edited 1 time in total.

Reply 1 of 9, by zuldan

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Update: I shorted the PSON and GND pins on the ATX connector and the board powered on (still looks good under thermal cam). Post card says the motherboard is stuck in reset. Hopefully restoring the resistors will give an improvement. Going to reflash the BIOS in the mean time.

Reply 3 of 9, by Ozzuneoj

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zuldan wrote on 2025-12-13, 07:22:

Update: I shorted the PSON and GND pins on the ATX connector and the board powered on (still looks good under thermal cam). Post card says the motherboard is stuck in reset. Hopefully restoring the resistors will give an improvement. Going to reflash the BIOS in the mean time.

I had an odd issue last year with the reset pins on one of my boards being shorted and preventing the system from powering on. Simply pressing the reset button cleared this behavior and it has been fine ever since. It was really strange, and also kind of lame because I did a ton of troubleshooting prior to finding out I just had to short the reset pins or connect and push the reset button.

Re: Two 440BX Board Issues: Dead WinTech\Edom W6BXA and a very picky SOYO SY-6BE+...

Now for some blitting from the back buffer.

Reply 5 of 9, by zuldan

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Ozzuneoj wrote on 2025-12-13, 07:53:
zuldan wrote on 2025-12-13, 07:22:

Update: I shorted the PSON and GND pins on the ATX connector and the board powered on (still looks good under thermal cam). Post card says the motherboard is stuck in reset. Hopefully restoring the resistors will give an improvement. Going to reflash the BIOS in the mean time.

I had an odd issue last year with the reset pins on one of my boards being shorted and preventing the system from powering on. Simply pressing the reset button cleared this behavior and it has been fine ever since. It was really strange, and also kind of lame because I did a ton of troubleshooting prior to finding out I just had to short the reset pins or connect and push the reset button.

Re: Two 440BX Board Issues: Dead WinTech\Edom W6BXA and a very picky SOYO SY-6BE+...

That’s strange. I’ll look into it.

Reply 6 of 9, by zuldan

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kixs wrote on 2025-12-13, 07:50:

Here you go:

https://i.imgur.com/FU011TL.jpg

Download the image and view at 100% 😉

Any chance I could get another picture of further up? I’ve marked the area. Found some more missing resistors.

The attachment 0EE0DA1A-98F5-47ED-8040-0ED7C91AD930.jpeg is no longer available

Reply 8 of 9, by zuldan

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kixs wrote on 2025-12-13, 12:06:

Sure:

https://i.imgur.com/eA5fp6k.jpg

Thanks for that.

I've now installed all the missing resistors. The BIOS had some different bits to the same version as the one on Retroweb, so I reflashed it. Unfortunately, the board still doesn't power on with the standard PW pins, I have to short the PSON and GND on the ATX connector. When it does power on, the board is stuck in reset 🙁 Also tried shorting the reset pins but no luck.

The attachment IMG_9588.JPG is no longer available

Reply 9 of 9, by PC@LIVE

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zuldan wrote on 2025-12-13, 23:10:
Thanks for that. […]
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kixs wrote on 2025-12-13, 12:06:

Sure:

https://i.imgur.com/eA5fp6k.jpg

Thanks for that.

I've now installed all the missing resistors. The BIOS had some different bits to the same version as the one on Retroweb, so I reflashed it. Unfortunately, the board still doesn't power on with the standard PW pins, I have to short the PSON and GND on the ATX connector. When it does power on, the board is stuck in reset 🙁 Also tried shorting the reset pins but no luck.

The attachment IMG_9588.JPG is no longer available

Hi, I saw that you tried to start, but it doesn't turn on, probably if the reset LED doesn't flash, and stays on it won't start.
Have you noticed if the LEDs of the keyboard ⌨️ flash, and if there is voltage on the mosfet of the VCORE.

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