Re: Soyo SY-7VBA133 Won't react to power on. Could it be this capacitor?

Should the bios chip [URL="https://www.alldatasheet.com/datasheet-pdf/pdf/74506/MCNIX/MX29F002NTPC-12.html"]https://www.alldatasheet.com/datasheet-pdf/pdf/74506/MCNIX/MX29F002NTPC-12.html[/URL] be receiving 5v in the VCC pin while the motherboard is in stand by mode? it's not currently.Re: Soyo SY-7VBA133 Won't react to power on. Could it be this capacitor?

Should the bios chip [URL="https://www.alldatasheet.com/datasheet-pdf/pdf/74506/MCNIX/MX29F002NTPC-12.html"]https://www.alldatasheet.com/datasheet-pdf/pdf/74506/MCNIX/MX29F002NTPC-12.html[/URL]

Re: Soyo SY-7VBA133 Won't react to power on. Could it be this capacitor?



You are right, it uses the VIA 686 southbridge. Some things I've checked/made sure of so far:

- Power +pin has 3.3v stable
- No component gets warm to the touch
- I've cleared the cmos using the jumpers
- New battery is in place

I still need to clean it and take a good picture....

Re: Soyo SY-7VBA133 Won't react to power on. Could it be this capacitor?

Thank you such an in depth response! No, when I click the power button (the button works) nothing happens at all. No movement, nothing. I'll clean it a little and come back with a better picture! I'll also inspect it more closely. Thank you so much!

Hi! I have an old SY-7VBA133 that I can't manage to turn on. The power supply works and the processor does as well.

According to the manual it looks like it should have a 5v indicator led, which doesn't turn on (I really don't know where it's located either)

I've noticed that it has a capacitor next to the power supply connector that is slightly bulged. Before I try to replace it, do you think it could be the cause for this motherboard not turning on?

There are 3 capacitors, it's the one in the middle.

I've uploaded a picture of it here...

Re: New Members - please post your introductions here

I love how many pages this thread has! I know it serves as a span filter, but really it's a beautiful log of people introduction.
I read about this forum a while ago in some blog regarding motherboard repair. I now have my own motherboard to repair and remembered this site.
I've been a software developer since I was a child, and while I have some limited knowledge of electronics, I won't hesitate to dig in and try to fix any broken hardware. Success vary, of course