unknown motherboard

The place to post if you are having trouble identifying your motherboard.

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Postby Buho » Wed Apr 09, 2014 4:00 am

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Postby Karlsweldt » Wed Apr 09, 2014 5:35 am

The first photo you posted shows a green item next to the keyboard socket. That is the BIOS battery. Inspect it carefully, as I noted.. for 'hairs' or leakage. If not replace in more than 5 years, likely is dieing. A new one can still be gotten, similar to this eBay listing. But don't pay more than $10.00 USD for any one battery! Other electronics stores may have them, such as a computer repair shop. Takes about 5 minutes to replace.
When the battery dies, the real-time clock stops, and this can cause the motherboard to not show life signs.. as well as the settings for the system being reset to default.
As to the board's identity, there were many near-identical models. Check that link I gave for http://stason.org/TULARC/pc/motherboards/ . You may find an exact match. Until the BIOS string is had, no 100% positive ID. Could be an AOpen, Asus, Beck, Opti or other name.
I did not note headers on the board for a floppy drive or hard drive. You likely will need a host card for those features, including the printer and serial ports. Check eBay in computer/laptop category. new, maybe $20.00 USD.. new! Anything of ISA design is becoming scarce.
A sound card and video card would also be needed. About the only "upgrade" available for that board is the Intel® "Overdrive" CPU, running at up to 100 MHz.
If you can get a better photo of the board, send it to me. For photos of less than 2 feet to the subject, use the "macro" mode (flower symbol) for best sharpness. Will see what I can find.
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Postby evasive » Wed Apr 09, 2014 7:28 am

Symphony SL82C491 & SL82C492 Chipset is the official name even though it's made by WinBond. The slot layout is a bit odd. The board material/colour/printing reminds me of BioStar. If it has an MB-14**** marking somewhere, let me know.
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Postby boheemee » Thu Apr 10, 2014 8:32 pm

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Postby evasive » Thu Apr 10, 2014 10:34 pm

Thanks boheemee 8)

http://www.elhvb.com/mobokive/archive/A ... index.html

pw42e.exe has this bios inside it:
09/12/95-Winbond-83C491-2C4J6A12-2E

the zip file has 4 pictures inside that perfectly match your board, the doc has the same info as the th99 page.
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Postby boheemee » Fri Apr 11, 2014 6:22 pm

No problem evasive. Glad it helped.
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Postby Buho » Wed Apr 23, 2014 4:37 am

Hi,

thanks for your answers.

My motherboard is exactly this

http://ru.pc-history.com/abit-computer- ... 4pw4t.html

Now, I can complete the form about this device at the museum.

Thank you very much.
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Postby evasive » Wed Apr 23, 2014 5:03 am

You are welcome. If you have other boards that need identification, just post in the forums.
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