Re: I got an ASUS K7M 1.04 motherboard recently. Encountering issues

Posted on 2023-08-01, 20:43

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by nathanieltolbert

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I had a black screen - no display problem with my K7M a few years ago. The cause turned out to be my PS2 keyboard, of all things. When I unplugged the keyboard, it booted fine. It's the only motherboard I ever encountered that didn't like that keyboard, so there's something uniquely picky about it. …

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Re: HardMPU, anyone?

Posted on 2023-07-31, 20:59

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by nathanieltolbert

in Marvin \ Sound

in Marvin \ Sound

I got together with several friends and did a run on making PCBs and the components needed to build the HardMPU-WT boards as well. I spoke directly with PickledDog, and they were super nice and really helpful in getting me the information I needed to be able to submit the files to get the boards …

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Re: I got an ASUS K7M 1.04 motherboard recently. Encountering issues

Posted on 2023-07-25, 03:50

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by nathanieltolbert

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

The verify function compares the EEPROM content to the buffer content. I.e. if you loaded a BIOS image you downloaded, it will be compared to the one currently on the EEPROM. If they're not the same (which they probably aren't), the verification will fail, and the programming software tells you how …

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Re: Sunlogix 80386-33/40 (Micro Express Computer) - Config Questions now

Posted on 2023-07-25, 03:46

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by nathanieltolbert

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I will remember that in the event that I need to upgrade that board. Thank you for that information!

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Re: Sunlogix 80386-33/40 (Micro Express Computer) - Config Questions now

Posted on 2023-07-21, 16:35

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by nathanieltolbert

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Any thought as to wether there is a jumper on this motherboard for putting the onboard cpu into flt? So as to allow the socketed cpu to function? I fiddled around with the different jumpers that say factory set do not use, and all I was able to do was make the board non-bootable. I worked on it for …

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Re: I have an Aztech Sound card that I cannot seem to get the drivers working for.

Posted on 2023-07-21, 00:00

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by nathanieltolbert

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

The software mixer does work with the nova16. There is a different driver set used for the straight nova16 but the vogons drivers section has them. What you will want to do is download the aztech drivers archived, find the nova16 folder, and then open the readme. From there you will want to match …

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Re: I got an ASUS K7M 1.04 motherboard recently. Encountering issues

Posted on 2023-07-12, 03:45

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by nathanieltolbert

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Okay, I know I haven't talked about this in nearly a year at this point, but I finally managed to get a T48 programmer purchased and I pulled the bios on this board. I put the chip in after identifying the type and I had it verify the data on the BIOS chip. Programmer said it was good. I used the …

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Re: I let the smoke out of a Pro Audio Spectrum 16. Can it be repaired and saved?

Posted on 2023-04-08, 04:31

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by nathanieltolbert

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

In that case, my money is on a broken -5V trace from the AT connector to the ISA slots, or a broken solder joint at the AT connector. Problems like this are common after battery damage, so your suspicion seems to be correct. I'm pretty sure that I didn't get all of the battery leakage damage …

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Re: I let the smoke out of a Pro Audio Spectrum 16. Can it be repaired and saved?

Posted on 2023-04-06, 21:37

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by nathanieltolbert

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Edit: -5v are required for PAS16, AFAIK. Back in the day it was just normal for XTs/ATs to have that voltage available. It was used for powering DRAM chips, originally, among other things. In theory, you can use that voltage blaster card that someone made (aka naked LM7905 on a PCB). Even though …

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Re: I let the smoke out of a Pro Audio Spectrum 16. Can it be repaired and saved?

Posted on 2023-04-06, 20:47

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by nathanieltolbert

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Well, I think I figured it out. Seems that even though this VLB motherboard is working, it has problems. There doesn't seem to be -5V supplied to the ISA slots. Popped the card into another 486 machine and it's working perfectly. Now I need to figure out how to fix this VLB board from Techmedia.

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Re: I let the smoke out of a Pro Audio Spectrum 16. Can it be repaired and saved?

Posted on 2023-04-06, 19:53

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by nathanieltolbert

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Nice work. There's a chance that your audio level is a software issue, as these cards can be pretty fiddly when it comes to driver selection and mixer settings. I'm on my phone so it's difficult to go searching for details right now. But check out this comprehensive vid. https://youtu.be/_ …

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Re: I let the smoke out of a Pro Audio Spectrum 16. Can it be repaired and saved?

Posted on 2023-04-06, 19:10

by

by nathanieltolbert

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Thank you everyone for the help. I have gotten the replacement tantalum caps and I have replaced the caps near the ISA connector. The card lives. No smoke. However, now I'm facing another strangeness. The volume on the out is really really quiet and turning it up loud enough to hear results in quite …

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Re: I let the smoke out of a Pro Audio Spectrum 16. Can it be repaired and saved?

Posted on 2023-03-25, 00:33

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by nathanieltolbert

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Does this model from Kemet look like it will work properly in the place of the 16V dead ones? T350E106K025AT It has the lead spacing of 2.54mm, it's 25V 10uf and 10%. I see multiple different listings for the same ratings but the prices are all different. I don't know which one I should be …

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Re: I let the smoke out of a Pro Audio Spectrum 16. Can it be repaired and saved?

Posted on 2023-03-24, 20:26

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by nathanieltolbert

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

It's not my card. A friend sent it to me to play with as I don't have a PAS16 of my own. They had bought the card on an auction site that isn't eBay, and he hadn't tested it, so they sent it to me. It died the instant I put it in. I don't want to try it without replacing the caps just in case …

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Re: I let the smoke out of a Pro Audio Spectrum 16. Can it be repaired and saved?

Posted on 2023-03-24, 02:58

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by nathanieltolbert

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I tried to check the spacing with my calipers. I got a reading of roughly 2.8mm, so would that probably be 2.54mm or 2.5mm spacing? I am still trying to get these calipers down. They have been great for measurements for 3d printing, but taking measurements on devices has been much more difficult.

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Re: I let the smoke out of a Pro Audio Spectrum 16. Can it be repaired and saved?

Posted on 2023-03-23, 23:34

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by nathanieltolbert

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

The price for Kemet is 2.42 a piece, and Kyocera is 1.04 a piece. But all of the Kyocera that are showing up have ESR listed next to them. Those prices are both for 10% tolerance. I am looking on Mouser.

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Re: I let the smoke out of a Pro Audio Spectrum 16. Can it be repaired and saved?

Posted on 2023-03-23, 20:14

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by nathanieltolbert

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Okay. I'm trying to buy the Tantalums. I have multiple listings. Some of them are labeled ESR. Should I go with those? Some say 10%, others say 20%. Should I go with the 20% ones or the 10% ones? I want to make sure I get ones that will last. The voltage I plan to go with is 25V, if that won't cause …

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Re: I let the smoke out of a Pro Audio Spectrum 16. Can it be repaired and saved?

Posted on 2023-03-18, 06:06

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by nathanieltolbert

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Okay I saw 10u at 25v with the proper spacing. Is Kyocera okay as a tantalum? The only other one that shows up is one called Kemet? Which would be the preferable brand? And on top of replacing the four next to the ISA edge connector, should I replace *all* of the tantalums on the board? There are 16 …

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Re: I let the smoke out of a Pro Audio Spectrum 16. Can it be repaired and saved?

Posted on 2023-03-16, 17:46

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by nathanieltolbert

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Thank you for the information. With them being PTH, I'm confident I can remove and replace. I wasn't sure what they were. Most of the capacitors I work with are electrolytic, so I wasn't certain these were capacitors. So as a safety precaution, I'm going to replace all 4 of the tantalums there in …

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Re: I let the smoke out of a Pro Audio Spectrum 16. Can it be repaired and saved?

Posted on 2023-03-16, 07:50

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by nathanieltolbert

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Okay here are the pictures I took of the components that failed. The pictures I got with my phone look close enough to read the values, but I'm not 100% certain. It looks like they say 10u and 16? Is that 16 volts? There also appears to be an orientation of positive and negative pins? I feel like …

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