Re: New 486 Build
Posted on 2016-08-10, 22:53
Am now messing about with overlay software for the hard drive...
Re: New 486 Build
Posted on 2016-08-10, 21:55
The next problem seems to be that my old Conner hard drive is no good. It worked the first time I powered up but now it tries to boot and gets stuck before DOS loads. I can here it spinning up and the stopping and then repeating. I have lots of old IDE hard drives but the smallest I have it 20GB …
Re: New 486 Build
Posted on 2016-08-10, 19:55
I can just attach the green ground wire from the PSU to anywhere metal on the case, right?
Re: New 486 Build
Posted on 2016-08-10, 18:08
Fantastic news! With the brand new Startech AT PSU the motherboard powers up. I had a feeling it was something to do with the power adapter/ATX PSU.
Re: New 486 Build
Posted on 2016-08-06, 16:10
Picked up the Startech from Newegg for $35 shipped. It's going to be an emergency spare. Seems like a good price for a brand new AT PSU. Appreciate the heads-up rick12373! I didn't even bother looking to begin with because I assumed there would not be any. Just goes to show. I wish they had AT …
Re: New 486 Build
Posted on 2016-08-05, 17:17
I did not realize you can still buy new AT PSUs on NewEgg. Ordered one to test with the board. If still no go I will try for a refund on the board.
Re: New 486 Build
Posted on 2016-08-03, 20:23
That stupid LGR video is the reason I started doing a build too ;-; It can be frustrating. I don't really have the spare parts to diagnose the problem I am having. As far I can tell if might be the motherboard or the video card or maybe something to do with the modern PSU/AT adapter combination. At …
Re: New 486 Build
Posted on 2016-08-03, 19:43
Yeah, cache config looks good. Sadly I don't know what else you could check other than the obvious (inspect the board for physical damage, missing components, and so on). Perhaps someone skilled at electronics can suggest something? Sadly with these boards old age is a factor, and there is a high …
Re: New 486 Build
Posted on 2016-08-03, 19:27
So, the CPU does get warm, but nothing. I am thinking it is either the motherboard or the graphics card. I wish I had another graphics card to test in it.
Re: New 486 Build
Posted on 2016-08-03, 19:03
I have no way of testing the components to see if they are working really. All the jumpers are set as you indicated. Not sure about the cache. I think it has 256kb cache. Here is what it looks like:
Re: New 486 Build
Posted on 2016-08-03, 18:34
Well, I adjusted the jumpers to match your suggestions. I have the 486 DX2 66MHz, one 8 MB RAM stick in there and the graphics card. Still nothing. Not sure what to do now.
Re: New 486 Build
Posted on 2016-08-03, 18:04
Thanks mate. I find it really difficult even with that documentation to figure out which pin is which. Things are much easier on modern boards!
Re: New 486 Build
Posted on 2016-08-03, 17:23
I am testing with an ATX PSU + adapter, works fine so I don't think that's the problem. However, by looking at your jumper settings I noticed the following differences with mine: - JP23: you have 3-4, 5-6, 7-8, according to the DX/DX2 section on the manual it should be only 5-6, 7-8 - JP24: looks …
Re: New 486 Build
Posted on 2016-08-03, 16:37
Thanks, the guy that sold it on eBay indicated that the board may have never been used but it did come with the DX CPU in it. Therefore I assumed the jumpers we already correct. One should never assume! I will change those jumpers and report back.
Re: New 486 Build
Posted on 2016-08-03, 16:15
OK, connected the speaker and switched the CPU. Same thing PSU fan spins, no video output and no sounds from speaker. I am using an adapter to adapt the ATX PSU to the AT board. I tried a few different ATX PSUs and no go. Maybe there is something wrong with the adapter and the way it is receiving …
Re: New 486 Build
Posted on 2016-08-03, 15:54
The board came with an Intel 486 DX 33 in it when I bought it. I looked at the jumper settings and it looked like I did not need to change them if I put a 486 DX2 66 in, which is what I did. I will put the 486 DX 33 in and see what happens.
Re: New 486 Build
Posted on 2016-08-03, 15:10
Anybody know why the speaker has 5 pins allocated on the pin out? I am trying to use an ATX case and my connector has 4 pins. Just got my board a couple of hours ago and noticed the same thing when I was setting it up for testing. I think it's a mistake in the jumper diagram, you can use the last …
Re: New 486 Build
Posted on 2016-08-02, 21:19
Anybody know why the speaker has 5 pins allocated on the pin out? I am trying to use an ATX case and my connector has 4 pins.
Re: New 486 Build
Posted on 2016-08-02, 01:11
Based on the white mark in the top right of your picture (which should be pin 1), the "20" on the lower left and trying to match the diagram with the text on the board, this would be the pinout for the front panel on the picture you posted: 10 09 08 07 06 05 04 03 02 01 20 19 18 17 16 15 14 13 12 …
Re: New 486 Build
Posted on 2016-08-02, 00:50
OK, I have looked at pin diagrams 100 of times before and connected them up on more modern boards. But this one has me a bit confused. I have the pin out information from http://motherboards.mbarron.net/index.html but I can't seem to get my head around it. When I actually look at the board I can't …
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