Solved Motherboard power stays on. turns off only at the PSU switch

[loninappleton]

All of my old reset switches and power switches cadged from junk and older
builds cannot be bad. They are mechanical.

I'm upgrading an old Biostar motherboard. Finally got some power to it via the
shorting method and even attached an LED at the power pins. All this worked ok.

But attaching what I have for a power switch ("power switch" marked on the plug
in the usual way, ) it does not keep the motherboard shut down waiting for pressing
the switch. I tried it both ways just in case -- this is a really old board. Everything stays on.

I can live with shutting power down from the PSU. Any suggestions?
And yes I have done a search on it and that is like a needle in a haystack as
usual.

Perhaps a switch suggestion itself? Though I have plenty of the reset and LED harnesses.
No operating system or anything else on this yet. Just board testing.

 

[samuria]

A lot of boards do that now some even keep usb lights on mouse

 

[Mellon Head]

A lot of boards do that now some even keep usb lights on mouse

Yeah. Mine does this. MB power light on, and USB port power always live. I turn my main power off by a surge arrestor/power bar. (After I've safely shut down, that is.)

Nothing to worry about, Lon.

 

[loninappleton]

I might not have explained it correctly. As is, the only way to turn on and off is at the power supply rocker switch.

This board did not act up when I had it going years ago.

What I'm going to try is altering the pin orientation. It's a square grid of four pins. I'm going to plug the pins 'in series' instead of parallel. It might be some scew up in the manual which I hadn't looked at for many years.

I'll mark solved if I get a result.

Thanks for answering. This is also practical practice for any future builds I do. I do bare board setups usually with an open top case. Not the usual style.

 

[essenbe]

If I understand your question correctly, most motherboards have at least 1 LED light that stays on while the computer is shut down to indicate you have "stand by power" going to the board, which it should have.

As previously stated some even maintain power through the USB ports. You can find a setting in BIOS to stop that on some boards or usually stop it in the advanced power options in the OS.

 

[Schrade]

Re-pinning front panel connectors - NOT a picnic. NOT pleasant, VERY tedious.

If that's what you're looking at, GET THE TOOL for re-pinning sockets.

My 7 Y/O FoxConn keeps power to LED, FROM front panel USB Port, to 2.5" HDD External Enclosure.

JMO here............

 

[essenbe]

If you can push the start button on the case and the computer starts, The front panel connector is correct. Changing it will just cause you problems.

 

[ThrashZone]

Hi,
My x99 does it too but it would be odd for a old board to do it
The light could mean memory issues but you'd have to notice exactly where the light is and refer to the boards manual for clues and what color the light actually is that is glowing white/ red/ orange/...:/

When I swapped out my acer board in a new larger case I have to test case wiring to the board to get it to work
First time the computer started as soon as I turned on the psu switch oops that's not right
No manual for me just had to flip a coin to see what worked.

 

[cornemuse]

Newer boards have setting to allow charging/accessing power when computer is off. There is setting in bios to turn this off.
Some old boards have led(s) that stay on (inside case on mobo) when comp is off. Some NIC cards have led lit when one has i-net/router connection.

I dont know about old mobo's staying on all the time, , , , ,

-c-

 

[loninappleton]

Hi,
My x99 does it too but it would be odd for a old board to do it
The light could mean memory issues but you'd have to notice exactly where the light is and refer to the boards manual for clues and what color the light actually is that is glowing white/ red/ orange/...:/

When I swapped out my acer board in a new larger case I have to test case wiring to the board to get it to work
First time the computer started as soon as I turned on the psu switch oops that's not right
No manual for me just had to flip a coin to see what worked.

Yes, as you say rather than other responses. The power rocker switch is all that works, whether anything is connected to the header or not.

And from above-- no I'm not going to rewire anything in series. I was just trying to explain plugging the leads in a different orientation. Sometimes color codes on the header can help with this rather than the manual. The manual is only adequate for a few things.

Just for reference this is an old AMD Sempron board K8M800 Micro AM2

Today I am using another SevenForums thread to get to sysprep so I can test with an older HD.

 

[ThrashZone]

Hi,
Yep this is all the connections I had to begin with to choose from to find the correct 2 or 3 to get it working with my new case
And yes wire color was considered tad bit of trial and error
Modifing old desktop machine in new case