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Power switch to motherboard connections

Which way round do they go

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I have Motherboard Asus P4S800-MX, and I need the connections for power Sw, Reset and HDD LED Please

P4S800-MX

Posted on Jan 26, 2010

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The led on the front won't light, and I have power connected, but nothing. Is there a reset somewere?


I am assuming you are trying to power up an installed motherboard, based on the category selection. You say that you have power connected. That means that you have connected the 20 (24) pin main connector and the 4 or 8 pin CPU power connector to the motherboard. Have you connected the front panels controls to the motherboard header? There are connections for the power switch, power LED, HDD LED, reset switch (optional). They must be connected in order for the motherboard to start. THe HDD and Power LED connections are polarity-based, so if you hook them upo backwards, their respective LED will not light. The HDD LED plug is usually red and white with the red being on the positive (+) terminal. The Power LED plug is usually green and white with the green wire going to the positive terminal. The power switch and reset switch wires can be connected either way as they are not polarized.

Jul 14, 2015 | Motherboards

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Motherboard


The front of your computer is the Front Panel

The area of contact pins on the motherboard, that the Main wires from the Front Panel go to; is the Front Panel header.

What you are asking for is a Front Panel header pinout.

I do not have the exact Front Panel header pinout, for your motherboard.
Tell you what I do have though..........

Looking at the Front Panel header on the Ebay link, for the Winfast 760m02-GX-6LRS; the Front Panel header looks to be below the CMOS battery, and close to the Bottom edge of the motherboard.

(Motherboard installed in computer case)

Black rectangular strip of plastic, with contact pins sticking up.
Also looks to be a GENERAL set-up for all Winfast motherboards.
(COULD be wrong here)

This is what I am referencing off of,

http://www.devhardware.com/c/a/Motherboards/Foxconn-Winfast-NF4SK8AA8EKRS-Motherboard-Review/3/

Go to the third photo down. Here you see the Front Panel wires, connected to the Front Panel header; on the motherboard.
(Below round CMOS battery)

Note that the contact pin on the Bottom row, and all the way to the Right; is NOT being used.
(I'm using a 26 inch HDTV as my primary monitor, so it may be easier for me to see)

Now look at this Front Panel header pinout, for another Winfast motherboard,

http://www.techsupportforum.com/forums/f15/winfast-mobo-front-panel-connection-558456.html

(Scroll down a little)

PWRLED is for the Power On LED (Light)
PWRSW stands for Power On switch
HD-LED stands for the HarDDrive activity LED (Light)
RESET stands for a Reset switch, IF USED.

Note where it has a Positive ( + ) sign, next to the pin for the PWRLED.
This is the pin the + wire from the Power On LED connects to.
It is the SAME for every LED that connects to the Front Panel header.

Let's number the contact pins, to make the explanation easier;
Starting at the Left side, Top row; going towards the Right;
Pins 2, 4, 6 and 8. There is NO Pin 10.

Starting on the Left side, Bottom row; going towards the Right;
Pins 1, 3, 5, 7, and 9.

Pin 2 is for the Positive wire.
Pin 1 is for the Positive wire
If the LED's are dim, (PWRLED, and HDD LED), OR; the LED's do not light up, switch the wires around.

(Pin 9 is N/C.........Not Connected. This is probably a 5 Volt test point, that was used by the factory)

There is a method you can use though, and find out what the individual contact pins are, in the Front Panel header;

Use an LED with two wires

Computer (Power Supply) plugged into power, go along the top row, and touch two pins at a time, with the two wires of the LED.

Example; Pins 2 and 4, as shown in the pinout.
Did the Power Supply come on?
No?

Go to the next two pins. Try again.
When the Power Supply comes on, you naturally know that is the two contact pins; for the Power On switch.
DO NOT touch them again. In fact connect the Power On switch wires.

Power Supply on, computer running;
Now go back along again;
1) LED light blinks?
You have the HarDDrive activity LED, contact pins.
2) LED light stays on?
You have the Power On LED, contact pins.
3) Computer restarts?
Those are the Reset switch, contact pins.

4) Nothing happens?
May be contact pins for a speaker, or contact pins that are not used.
(Speaker is for hearing BIOS Beep Codes.
You have a Piezo buzzer, to the Left of the CMOS battery; for that)

Post back in a Comment, as to the results.

If possible, I would like to ask upon you; to post the Front Panel header pinout; when you find what it is.

That way when a person in the future also has this same problem; the solution will be posted on the internet, for them to find.

For additional questions please post in a Comment.
Regards,
joecoolvette

Apr 30, 2013 | Leadtek Winfast 760m02-gx-6lrs Socket 754...

1 Answer

My motherboard is dead replaced power supply still nothing


you may got a power spike if so board bad look at the board the caps are they round or flat if rounded on top bad board

Jan 13, 2013 | HEWLETT-PACKARD Hewlett Packard GV34469001...

1 Answer

No power


Hi there,

Check for power supply power. Remove it from the motherboard and short or connect the green plus the black wire beside it. if the power supply's fan turns, then there's a problem with the motherboard.

Check for loose connection between the power supply and the system board. Apply WD-40 or contact cleaner on the contacts (mainly, this is a 24pin array connection) then unplug replug it to the motherboard.

Might as well check also for the power button's connection. Temporarily connect the reset switch to that of the power switch to check if the switch is the defect. Connect everything and switch it on.

Replug the memory modules including the processor but make sure you have a thermal compound handy to replace the gray/white paste-like matter between the heatsink and the actual processor.


Please do notify me if you need clarification, i'd be willing to provide a followup.

Hope this helps,
levibit

Dec 14, 2010 | ASUS P5KPL-AM SE Motherboard

2 Answers

PC won't boot up.


recheck all connections, make sure the switch on the back of the power supply (if it has one) is set to the on position. there is a chance the motherboard has failed. with the power off examine the capacitors on the motherboard, especially the ones near the cpu. if they feel rounded on the top they have failed. unless you are good at soldering... consider buying a new motherboard.

Sep 23, 2009 | Intel D865GBF Motherboard

1 Answer

Need help


the pin arrangement is 4 pins and pins.
From left top row (4 pins) first 2 are power led, next 2 are power switch, next 1 is empty
from left bottom row ( 5 pins ) first 2 are hdd, next 2 are reset, next 1 is empty.
The connectors for the power led and the hdd produce a light, if they don't produce a light, power off your pc and switch the cables round the other way and power on again.

Oct 30, 2008 | E-Machines (308714) Motherboard

1 Answer

Power lead


The Switch is non-powered except by the board.
Black should go to power or + side

It's like a wall switch for the light (power comes in on one side and out on the other) If it were a push in to a detent (like the Old 386's and 486's with AT power supply) to connect and a push in to release the detent it would make a difference. With these power buttons on the cases now, it doesn't.

Apr 19, 2008 | MSI K9VGM-V Motherboard

1 Answer

Front Panel Connection Problem


if you look at the PDF file here:
ftp://download.intel.com/support/motherboards/desktop/d845hv/A6513601.pdf
On page 68 you can see it more clearly. Just enlarge the file.
do you know the make and model of the case?

Nov 20, 2007 | Intel D845HV (735858149143) Motherboard

1 Answer

NOT STARTING UP


this is a sign that you have the power,reset etc connections onto the motherboard wrong. Double check the connections as you may have them pined the wrong way round, you will also have to remove the power plug from the mains and the back of the pc to allow the board to reset the power settings, this will be why the fan runs then stops when fully inserted; as the connections to the front panel are connected wrong

Aug 24, 2007 | Gigabyte GA-6WMMC7 Motherboard

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