Could be cache issues, just had some problems with two Vi15G motherboards caused by cache chips. They complain about bad cache but won't boot at all without the bad cache chips. Maybe reseat them, remove or replace them?

Guessing with coin cell battery there won't be any corrosion on the board, any damage at all?

I also have this board and it also has problems. My only works when CPU voltage is set to 5V. Otherwise it looks like dead.

Also try with good FPM memory.

JidaiGeki wrote:

Could be cache issues, just had some problems with two Vi15G motherboards caused by cache chips. They complain about bad cache but won't boot at all without the bad cache chips. Maybe reseat them, remove or replace them?

Guessing with coin cell battery there won't be any corrosion on the board, any damage at all?

Nope... No corrosion on the board. The cache might be dead, though I don't understand the manual completely, regarding cache-setting-jumpers.
I will post some pictures of what I have set the jumpers to, when running the dx33. (just have to make them ready for posting)

Stick with the DX-33 for trying to get it to work. That was always a good strategy for when I tried to get 486 boards going 😀

RAM and Cache are obvious candidates to check out. Pull out and re-seat all the socketed chips. Clean the ISA slots as well. Start with just an ISA graphics card, nothing else.

486 are often a lot of work to get going.

Was it sold as "as is" or "working"?

kixs wrote:

I also have this board and it also has problems. My only works when CPU voltage is set to 5V. Otherwise it looks like dead.

Also try with good FPM memory.

Hmmm.... I have tried something like 7 or 8 differnt FPM modules.
CPU get's hot though.

The FPM that I am using are all 60ns modules. All between 8 and 16 mb each.
I have even tried 4x16mb 60ns FPM.

I have attached the pictures of the jumper settings....

PhilsComputerLab wrote:

Stick with the DX-33 for trying to get it to work. That was always a good strategy for when I tried to get 486 boards going :) […]
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Stick with the DX-33 for trying to get it to work. That was always a good strategy for when I tried to get 486 boards going 😀

RAM and Cache are obvious candidates to check out. Pull out and re-seat all the socketed chips. Clean the ISA slots as well. Start with just an ISA graphics card, nothing else.

486 are often a lot of work to get going.

Was it sold as "as is" or "working"?

It was tested to work, before shipping. I have been told, that the previous owner had to ship it a second time, because the package was damaged and they forgot to tell him that they had it. He got it back from them, after 14 days, when he contacted the postal service.

Just noticed something....

Is my board with 512kb cache installed? According to the manual, it can take eighter 128 or 256kb.
Can the board run without cache? If so, shall I take out the tag and the four cache chips to test?

According to the datasheets You have 256k cache and 16k Tag installed.

Ok.... Now I am worried....

LuckyStar LS486E rev.C2 and Cyrix 5x86@133

This post, had the FSB reversed from my manual. Does anyone know were to find a correct one?
Placeing the jumper in the bottom position, made my board post. 😳

EDIT:
Posted with an dx33 and dx2-66. Guess this board can not run 3v CPU's.
All my 5volt's have posted now. Board set up with Intel 486dx2-66 and 64mb 60ns FPM.

To anyone, downloading the manual from:
http://motherboards.mbarron.net/models/486pci/ls486ec2.htm

DON'T place FSB-jumper in top position. It's bottom for 33mhz.

The cache is properly configured - don't mess with it. It has 256k of cache - it's the maximum amount the board supports. Make sure to carefully set the CPU jumpers - there are A LOT of them. Also, JP18 might be reversed. On some boards 33MHz is 1-2, on others it's 5-6. The jumper is the same practically on all boards, but it's silkscreened backwards on some revisions. Use this manual for the board:

Also here are the settings for the DX5:

To correctly set these, orient the board with the CPU socket closest to you and the cache chips to the top left.

Also set JP18 to 1-2 (or 5-6 it that won't work) for 33Mhz. 40Mhz (for the DX2-80) is 3-4 (middle). Voltage is W1 and JP13. 3.3v is W1 open (no jumper) and JP13 to 1-2.

Thanks. 😀 will download and save it. The old printed manual I found today, are going out.

Well....
I have had the board going now. Seems as the manual are not 100% correct on the CPU settings. Anyhow.
Some new problem has risen.

When I boot it with parity (4Mx35) it will load an operating system, yet not show any L2-Cache.
When I boot it without parity memory, it will get stuck on the "summary-screen", that are reporting
stuff like drives, ports and such. 256kb cache are detected however.
I am talking about the summary report that are shown, right before an operating system is being loaded.

Has anyone here, had any issues like this?

If Your cache and Tag jumpers are still where they were in the photo then they are wrong.

Both should be 2-3 for JP1 and JP2. You have 256k and 16k Tag. Google the datasheets if You wish, they
are easy to find.

If it's not incorrect jumpers, then make sure memory timings aren't too tight, as in try cas3 instead of cas2. My
motherboard will freeze at the summary screen if 1 setting is wrong in cas1 instead of 2. All others I can put
them where I want.

Mines a revision D so not the same, can use EDO which makes life easier.

Imperious wrote:

If Your cache and Tag jumpers are still where they were in the photo then they are wrong. […]
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If Your cache and Tag jumpers are still where they were in the photo then they are wrong.

Both should be 2-3 for JP1 and JP2. You have 256k and 16k Tag. Google the datasheets if You wish, they
are easy to find.

If it's not incorrect jumpers, then make sure memory timings aren't too tight, as in try cas3 instead of cas2. My
motherboard will freeze at the summary screen if 1 setting is wrong in cas1 instead of 2. All others I can put
them where I want.

Mines a revision D so not the same, can use EDO which makes life easier.

Thanks... The manual is however a bit "lacking" on some points...

As of now, I have not changed anything regarding the cache setup and not swapped any modules.
JP1 is still closest to the memory modules and JP2 is closest to the tag module.
What is what? Is 1-2 against the tag or memory modules?

I have noticed some strange stuff... Running a i486dx2-66, only one 70ns non-parity (x32) will work, and only one 60ns parity (x36) will work. Running an Amd 486dx2-80 at full speed (40fsb), every modules that I have will make it boot, yet at no point is the cache detected.

Can this be a result of incorrect cache settings? And again, are 1-2 closest to the tag or the 72-pin sockets?

A bit of update on this....

I swapped the TAG chip, with a 32kx8, and it would still not run stable with different memmory modules.
Those that were running stable, did not detect the cache at second boot.

I reverted back to a 486dx2-66 cpu, and installed a 16mb FPM with parity check.
Did a couple of benchmarks, rebooting with both reset button and ctrl+alt+del.
The exact combo I am running right now, seems to be stable enough. Going to wait an hour or two and
then I will test it out once again. I want to make shure that it is 100% stable now.

3d bench gave me a score of 40, using a CL-5446, 16mb ram and an Intel 486Dx2-66. Norton sysinfo reported 132.
I really have no clue. Though the score seems decent enough.

Right. Check the cache jumper settings. They are right under the memory slots. Set JP2 to 2-3 and JP1 to 1-2. Be careful and look for the "1" near each jumper when setting them so you don't get it backwards. That board got me 140mb/sec memory read speed with an overclocked cyrix at 133Mhz in speedsys - it's the fastest 486 board I've ever tested next to the SR-M401-A (Pine PT-423B). I've never had any issues with the L2 cache, but I never messed with the chips or cache jumpers on that board.

Alternatively you can try JP1 to 2-3 (for 16x8 tag). Make sure to go into BIOS and load bios defaults as well. Also, DO NOT MIX DIFFERENT BRAND/TYPE MEMORY MODULES ON THIS BOARD. You need to use identical modules or it will refuse to POST or act up.

Thanks for the heads up.... 😀
I simply can not see the markings for PIN-1. Nor 2 and 3 for that matter. (think I need glasses)
The manual does not state anything about what are the right pin's.
Is 1 towards the memory modules, or is 1 towards the tag?

Have you managed to get 3.45V cpus to work?