Re: Looking for a Socket 7 motherboard

Posted on 2021-06-13, 09:21

by

by Odiseo

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

dionb wrote on 2021-06-12, 23:52: Although if you want to use an ATX PSU, why not go for an ATX So7 board? Thanks for the info. I don't have a spare ATX power supply at the moment. That's why, basically.

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Re: Looking for a Socket 7 motherboard

Posted on 2021-06-12, 22:34

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by Odiseo

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Usually those based on the Intel 430TX chipset. Do all motherboards based on the 430TX chipset have an ATX power connector? Or do boards based on this chipset with an AT power connector exist? Note that that board has an i430TX chipset. Generally it's one of the best So7 chipsets, but there's a big …

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Re: I believe I broke my Socket 7 motherboard, advice needed

Posted on 2021-06-12, 21:59

by

by Odiseo

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Cheaper to get new ATX PSU including reduction ATX/AT. If I do install another AT Socket 7 motherboard, I will then consider replacing the AT power supply with an ATX model plus adapter. @Odiseo: please no ebay links OK, I didn't know about this. and no requests for sales on Vogons. OK. My old …

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Re: I believe I broke my Socket 7 motherboard, advice needed

Posted on 2021-06-12, 15:05

by

by Odiseo

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

What you really should check is ripple current (...). I'm reading up on this. How old is the PSU? No idea. I guess 25 years. Maybe more. Best thing to do as far as PSUs go is to get a good quality NEW ATX PSU and use an ATX to AT adapter. Good idea. I started thinking about doing so after finding …

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Re: Looking for a Socket 7 motherboard

Posted on 2021-06-12, 15:02

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by Odiseo

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I see some bent pins near the keyboard port. I hadn't noticed this. Thanks for pointing it out. The seller claims in the description that the board looks like new, as if it only recently left the production facility. The description is in Italian, which I understand quite well. They have two boards …

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Re: Looking for a Socket 7 motherboard

Posted on 2021-06-12, 14:43

by

by Odiseo

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I just found an auction for a Kaimei Jamicon KM-T5-T1 on eBay. Tested and fully functioning. And for a reasonable price. The board has both four SIMM and two SDRAM slots. Apart from some SDRAM modules on my Pentium 3 machine, I don't have confirmed good RAM modules. The seller told me he has modules …

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Re: I believe I broke my Socket 7 motherboard, advice needed

Posted on 2021-06-12, 13:25

by

by Odiseo

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I think, that tolerance for AT PSU is similar as for ATX. For 12V rail is +/-5%, that means 11,4V -12,6V is ok. For 5V rail is 5% too, so 4,75V-5,25V. So, as I had been suspecting, the PSU should be good. I'm looking for another Socket 7 motherboard. I created another topic . Thanks for the help.

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Looking for a Socket 7 motherboard

Posted on 2021-06-12, 00:49

by

by Odiseo

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Those of you who've been reading this topic know that I'm considering buying a Socket 7 motherboard. I have one but I killed it in a moment of negligence. I'm in Belgium. There is nothing on my local second-hand and auction site. A comparable Dutch site has a few broken boards and maybe one that …

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Re: I believe I broke my Socket 7 motherboard, advice needed

Posted on 2021-06-11, 23:08

by

by Odiseo

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Yellow wire is 12V, red 5V, black are the ground. I bought a CAT III multimeter a few days ago and finally got round to testing the AT PSU today. My multimeter indicated 11.68V on the yellow wires of three different molex connectors. So not quite 12V. Is this an acceptable result? The result on the …

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Re: I believe I broke my Socket 7 motherboard, advice needed

Posted on 2021-06-09, 13:23

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by Odiseo

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

You can measure the PSU, if it gives the correct voltage on the Molex connectors, it'll probably be fine. I don't have a multimeter. I can go pick one up at a hardware store after work in a few hours. I've been googling for guides on how to use a multimeter to test an AT power supply. Can you point …

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Re: I believe I broke my Socket 7 motherboard, advice needed

Posted on 2021-06-08, 21:37

by

by Odiseo

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Kind offer for the parts, I won't have time any time soon to make good use of them, but others will. Roughly where are you? I'm in Belgium. Assuming the board died because I had inserted the RAM modules backwards (albeit only loosely/halfway), could other components be damaged too? Specifically, …

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Re: I believe I broke my Socket 7 motherboard, advice needed

Posted on 2021-06-08, 21:02

by

by Odiseo

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

If you haven't already, might be worth one last try plugging memory and cpu back in. You've moved that fragment, so you could see if the behaviour has changed. I did so after I had tapped on the side of the board and tried to pry under Slot 3 with a needle. Same result as before: long continuous …

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Re: I believe I broke my Socket 7 motherboard, advice needed

Posted on 2021-06-08, 20:48

by

by Odiseo

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

After the system failed when you set it up for 150MHz, did you switch back to 133MHz? Double-check the speed jumpers. Continous beeps might also occur when the processor can not handle the speed you request, so you might want to double-check the speed selection jumpers. I checked a few hours ago …

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Re: I believe I broke my Socket 7 motherboard, advice needed

Posted on 2021-06-08, 16:57

by

by Odiseo

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Is there something between the slots 3 & 4, near the top? I tried to pry it out but it disappeared under slot 3. Did you try different RAM sticks in that board? It's possible that you fried the sticks you inserted backward and that the board is still fine. I have two other modules, which I inserted …

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Re: I believe I broke my Socket 7 motherboard, advice needed

Posted on 2021-06-08, 09:00

by

by Odiseo

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I'm looking to get another Socket 7 motherboard. Any advice? I looked on eBay, but there are many that are untested, even known to be faulty, or very expensive. Any idea where and how to look for a suitable board? I'm in Belgium. There is nothing on my local auction and second-hand websites. Some of …

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Re: I believe I broke my Socket 7 motherboard, advice needed

Posted on 2021-06-07, 22:52

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by Odiseo

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I'd get the board out, check out if there is anything between the slots (it looks to me like it might be a solder splash, but no idea where that'd come from), and check if any of the solder joints between slot and motherboard were damaged if there was a lot of force put on the slot. Yes, I'll get …

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Re: I believe I broke my Socket 7 motherboard, advice needed

Posted on 2021-06-07, 21:52

by

by Odiseo

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Is there something between the slots 3 & 4, near the top? I think you're right. I see something too. I'll take the board out of the case again tomorrow to have a closer look. Possible but not likely. Assuming that I *probably did* insert the modules backwards (albeit loosely) into Bank 1 yesterday …

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Re: I believe I broke my Socket 7 motherboard, advice needed

Posted on 2021-06-07, 20:55

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by Odiseo

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I can't see physical damage. That's what I thought too. I had my hopes up when I saw both the modules and the slots looked fine and, later, when I realized I inserted the modules into Bank 1 yesterday. Just to be sure we are on the same page, when I say Bank 0 I mean the two slots marked SIMM1 and …

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Re: I believe I broke my Socket 7 motherboard, advice needed

Posted on 2021-06-07, 18:09

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by Odiseo

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I removed all the components again, including the RTC. I cleaned the contacts of the RAM modules witth alcohol. I then reseated all the components on the board. This time I put the RAM modules in Bank 0, with the cut-out where the notch is in the slots, to the side next to the two power connectors …

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Re: I believe I broke my Socket 7 motherboard, advice needed

Posted on 2021-06-07, 17:10

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by Odiseo

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Here are the RAM slots.

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