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

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Postby Aaronams25 » Fri Jul 19, 2013 8:48 pm

Ok I am new to forums so i hope this pic uploads correctly.
this is an image of one of my older i486 boards. It has the same serial code on the solder side of board. Which does not tell us much. But what does help is the manufactures serial and model ID shown on the component side of board. Mine is ISA-486SV2 REV. 2.4


This is where you might be able to find any other info you would require for this particular board.

I'm hoping this helps anyone else that might have further questions on this matter.
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Re: ISA-486SV2

Postby fergusof » Sun Feb 04, 2018 6:43 am

Thanks for this. I have an ASUS ISA-486SV2 rev. 2.7 motherboard. I have installed a 486DX2 and 4Mb ram (no cache). Seems it might be dead. No beeps from speaker, no LED lights no matter where I plug them in.

Does that indicate true deadness to you? I thought even if I had nothing plugged in except the power supply, I would at least get a beep or a light. Power supply works for anything with a Molex connector, so I presume there is also power at the motherboard connectors.

ASUS ISA-486SV2-small.jpg
ASUS ISA-486SV2 rev. 2.7 motherboard not working
ASUS ISA-486SV2-small.jpg (221.59 KiB) Viewed 62 times
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Re: ISA-486SV2

Postby Karlsweldt » Mon Feb 05, 2018 8:46 am

Almost all 486 systems had many jumpers to set, regarding base FSB speed, multiplier, cache type and core voltages. Consult the user manual for proper jumper setups before declaring "DOA" on it.
Then too, the BIOS battery keeps the real-time clock working when shut down. Typical battery life is about 3 years. If no real-time clock activity, good chance no life signs from the system. And ensure floppy drive/ hard drive data ribbons are connected properly. Wrong ribbon polarity, main data bus will be bridged.. no data flow!
F@H.. to solve mankind's maladies.. in our lifetimes!
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