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Test and troubleshoot PC@LIVE motherboards

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Reply 900 of 903, by PC@LIVE

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I was looking for an S.7 motherboard among the MBs, yes that's right, but although most are grouped, with the indication of each card, there are others that are instead in a box 📦, without it being written what the content is.
So sometimes I find motherboards, which I repaired or started to repair, or boards that after a component replacement intervention, have not given signs of life, so after some time ⏱, they are re-examined in search of a solution, hoping to make them work again.
Some time ago, I don't know exactly how long, but it could be a couple of years (?), I replaced several capacitors on an S.478 motherboard.
This is one of the first models with VIA chipset and DDR RAM, so P4/400, the card is a "AZZA P4M2-MVB", as mentioned above, I replaced several electrolytic capacitors, except for one of the SACON 3300uF 6.3V, well today as a surprise 😱, I discovered that that one also needs to be replaced, you can see a bulge at the top, and this is a sign that it needs to be changed.
I should have a spare capacitor, I would like to use a Nichicon equal to the other six, from memory I don't remember if this motherboard has been tested or not, however we will have to wait for the replacement of that capacitor, to do a start-up test.

AMD 286-16 287-10 4MB HD 45MB VGA 256KB
AMD 386DX-40 Intel 387 8MB HD 81MB VGA 256KB
Cyrix 486DLC-40 IIT387-40 8MB VGA 512KB
AMD 5X86-133 16MB VGA VLB CL5428 2MB and many others
AMD K62+ 550 SOYO 5EMA+ and many others
AST Pentium Pro 200 MHz L2 256KB

Reply 901 of 903, by Ydee

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Chkcpu wrote on 2025-10-26, 16:59:
Ciao Elio, […]
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Ciao Elio,

Thanks to @Ydee’s nice find of the Zida BIOSes, I was able to check the latest 5SVA-E Rev 1.40e BIOS.
I has indeed K6-2 support up to 400MHz, but no K6-III or K6-2+/III+ support.
It is also limited to 32GB IDE drives.

Cheers, Jan

Hi Jan,

there is one newest BIOS for Zida, its version 1.41 - but it's very hard to detect changes from previous versions - Zida didn't mention them anywhere, and the only description was provided by the brand's former distributor in the Czech Republic, Levi International, which still maintains a site with BIOSes and manuals for old Zida boards. And BIOS v. 1.40 is already modded for support HDD bigger than 32GB ( up to 128GB, I have it on the 5SVA rev 1.2 board and the 80GB disc works without any problems).

Reply 902 of 903, by Chkcpu

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Ydee wrote on Yesterday, 16:29:
Chkcpu wrote on 2025-10-26, 16:59:
Ciao Elio, […]
Show full quote

Ciao Elio,

Thanks to @Ydee’s nice find of the Zida BIOSes, I was able to check the latest 5SVA-E Rev 1.40e BIOS.
I has indeed K6-2 support up to 400MHz, but no K6-III or K6-2+/III+ support.
It is also limited to 32GB IDE drives.

Cheers, Jan

Hi Jan,

there is one newest BIOS for Zida, its version 1.41 - but it's very hard to detect changes from previous versions - Zida didn't mention them anywhere, and the only description was provided by the brand's former distributor in the Czech Republic, Levi International, which still maintains a site with BIOSes and manuals for old Zida boards. And BIOS v. 1.40 is already modded for support HDD bigger than 32GB ( up to 128GB, I have it on the 5SVA rev 1.2 board and the 80GB disc works without any problems).

Hi Ydee,

Thanks for these 2 additional Zida 5SVA-E BIOSes.

I found the modded v1.40 BIOS with 128GB IDE HDD support as well. It is one of the BIOS mods by the Wim’s BIOS team and team member Rainbow still maintains a website with all these BIOSes at http://wims.rainbow-software.org/index.php
This BIOS fixes the 32GB IDE HDD limit, but has no other improvements and has the same CPU limitations as the original v1.40.

The “unknown” v1.41 BIOS piqued my interest, so I looked at this BIOS in detail.
It appeared to be the same 06/19/1998 BIOS as v1.40, but with a few BIOS Setup default changes. The v1.41 Enables BIOS Options like Video BIOS Cacheable, System BIOS Cacheable, and OnChip USB by default. The v1.40 has these options as well but has them Disabled as default. But you can aways Enable them if you want.
The v1.41 BIOS also clears all BIOS PnP data (the ESCD block) when you select Load BIOS Defaults in the main CMOS Setup menu. This is highly unusual.

For the rest, this v1.41 BIOS is identical to the v1.40, so it is not a new build.
The changes in v1.41 can easily be made with Award’s MODBIN tool and it looks like the distributor made these changes themselves, maybe on request of a client.
I personally prefer the defaults in the v1.40 BIOS. 😉

Cheers, Jan

CPU Identification utility
The Unofficial K6-2+ / K6-III+ page

Reply 903 of 903, by PC@LIVE

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Ydee wrote on Yesterday, 16:29:
Chkcpu wrote on 2025-10-26, 16:59:
Ciao Elio, […]
Show full quote

Ciao Elio,

Thanks to @Ydee’s nice find of the Zida BIOSes, I was able to check the latest 5SVA-E Rev 1.40e BIOS.
I has indeed K6-2 support up to 400MHz, but no K6-III or K6-2+/III+ support.
It is also limited to 32GB IDE drives.

Cheers, Jan

Hi Jan,

there is one newest BIOS for Zida, its version 1.41 - but it's very hard to detect changes from previous versions - Zida didn't mention them anywhere, and the only description was provided by the brand's former distributor in the Czech Republic, Levi International, which still maintains a site with BIOSes and manuals for old Zida boards. And BIOS v. 1.40 is already modded for support HDD bigger than 32GB ( up to 128GB, I have it on the 5SVA rev 1.2 board and the 80GB disc works without any problems).

Chkcpu wrote on Yesterday, 19:16:
Hi Ydee, […]
Show full quote
Ydee wrote on Yesterday, 16:29:
Chkcpu wrote on 2025-10-26, 16:59:
Ciao Elio, […]
Show full quote

Ciao Elio,

Thanks to @Ydee’s nice find of the Zida BIOSes, I was able to check the latest 5SVA-E Rev 1.40e BIOS.
I has indeed K6-2 support up to 400MHz, but no K6-III or K6-2+/III+ support.
It is also limited to 32GB IDE drives.

Cheers, Jan

Hi Jan,

there is one newest BIOS for Zida, its version 1.41 - but it's very hard to detect changes from previous versions - Zida didn't mention them anywhere, and the only description was provided by the brand's former distributor in the Czech Republic, Levi International, which still maintains a site with BIOSes and manuals for old Zida boards. And BIOS v. 1.40 is already modded for support HDD bigger than 32GB ( up to 128GB, I have it on the 5SVA rev 1.2 board and the 80GB disc works without any problems).

Hi Ydee,

Thanks for these 2 additional Zida 5SVA-E BIOSes.

I found the modded v1.40 BIOS with 128GB IDE HDD support as well. It is one of the BIOS mods by the Wim’s BIOS team and team member Rainbow still maintains a website with all these BIOSes at http://wims.rainbow-software.org/index.php
This BIOS fixes the 32GB IDE HDD limit, but has no other improvements and has the same CPU limitations as the original v1.40.

The “unknown” v1.41 BIOS piqued my interest, so I looked at this BIOS in detail.
It appeared to be the same 06/19/1998 BIOS as v1.40, but with a few BIOS Setup default changes. The v1.41 Enables BIOS Options like Video BIOS Cacheable, System BIOS Cacheable, and OnChip USB by default. The v1.40 has these options as well but has them Disabled as default. But you can aways Enable them if you want.
The v1.41 BIOS also clears all BIOS PnP data (the ESCD block) when you select Load BIOS Defaults in the main CMOS Setup menu. This is highly unusual.

For the rest, this v1.41 BIOS is identical to the v1.40, so it is not a new build.
The changes in v1.41 can easily be made with Award’s MODBIN tool and it looks like the distributor made these changes themselves, maybe on request of a client.
I personally prefer the defaults in the v1.40 BIOS. 😉

Cheers, Jan

Thank you both very much for the suggestions and for the info on the BIOS.
Reading in fact I would say that I would also go to update the original BIOS, with the VER:1.40 one.
Greetings

AMD 286-16 287-10 4MB HD 45MB VGA 256KB
AMD 386DX-40 Intel 387 8MB HD 81MB VGA 256KB
Cyrix 486DLC-40 IIT387-40 8MB VGA 512KB
AMD 5X86-133 16MB VGA VLB CL5428 2MB and many others
AMD K62+ 550 SOYO 5EMA+ and many others
AST Pentium Pro 200 MHz L2 256KB