Question about Compaq (283983-001) Motherboard

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Pin setup where to put pins for power and led lights

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  • Talons06 Nov 07, 2008

    I replaced the motherboard and need to know where the Power SW, Power Led and HDD Led are attached and where.



    Motherboard is Compaq (HP) 283983-001 Intel 845 Socket 478 mA w/VID SND also goes in several HP models. Compaq Evo D500 Desktop Series Evo D510
    models with Intel 845G Chipset

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Without the exact model I would try each pin slot for the led, power, hdd, etc you will not damage mobo by trying these as they do not have power going thru them.

Posted on Oct 24, 2008

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2 Answers

Front panel connections


I don't find the Front Panel header pinout online, nor do I have an MSI MS-5191 in the shop.

I would suggest using one the LED lights with two wires.
(3-wire is a dual color LED)

There are two rows of pins. Usually the Power On switch, Power On LED, and Speaker; are on the same row.
HarDDrive activity LED, and Reset Switch are on the opposite row.

Speaker has 4-pins designated for it. All the others use 2-pins.
(Unless the PWR ON LED is a dual color jobbie)

Touch two pins next to each other, in the same row; with the 2-wire LED.
Start with finding the Power On switch first.

Usually the top row 1st two pins are Power On LED (Light)
Next in line are the 2 pins for the Power On switch.
Bottom row 1st two pins are usually HarDDrive activity LED (light)
Next 2-pins are usually Reset switch.

May not apply to a motherboard old enough to use a Socket 7 processor socket.
There may be 18 to 20-pins.
Bear in mind that many are not used, and probably 4 are for an internal speaker, for hearing BIOS Beep Codes.
May be two separate Front Panel headers.

Once you find the two contact pins in the Front Panel header, for the Power On switch; I would put the Power On switch wires on.
The small pin connector on the wire/s, will keep you from accidentally touching these two pins again, when the computer is on.

Now you have the two pins for the Power On switch, and the computer is running; then keep touching 2-pins at a time with the LED. (Light Emitting Diode)

LED stays on? You have the Power On LED (Light) pins.
LED blinks? HarDDrive activity LED (light) pins.
Computer restarts? Reset switch pins.

Look for abbreviations near the pins in the Front panel header.

PWR, Pwr, Pwr On, Sw, and SW; are just some of the abbreviations for the Power On switch.

HDD LED, and HDD are two for the HarDDrive activity LED. (Light)
(If it states HDD SW it is the Power On switch. Weird old way of marking)

RST, Reset, and RSW, are for the Reset Switch.
(Reset Button)

If you see 4 pins marked with a bracket ( [ -> Turn so it's horizontal), these are for the internal speaker.

Type MSI front panel connector in your search bar, and look at -> images. See if you can find an image of your MSI Front Panel header pinout.

You can bet MSI carried out that Front Panel header pinout, on other MSI motherboards, besides the MS-5191.

The MSI MS-5191 may have been a motherboard made by MSI, especially for a pre-built computer manufacturer, and not listed on their website as an OEM motherboard.
(Original Equipment Manufacturer)

Won't have the Front Panel header pinout, listed on MSI's support website. (Doesn't)
But you can bet there IS an OEM motherboard made by MSI, that the Front Panel header DOES match.

May be different expansion slots, or motherboard chipset, or whatever; but the same Front Panel header pinout.

Regards,
joecoolvette

Jan 05, 2013 | AMD MicroStar MS-5191 Socket 7 mATX...

1 Answer

9VJL3 front panel


Do not have the Front Panel header pinout.

Do have;

Take an LED (Light), with two wires, and check the pins with it.
There is a Top row of pins, and a Bottom row.

Touch the first two pins in the Top row, left side. Does it light up?
No? Go to the next two pins. No? Go to the next two pins.

Keep going until the Power Supply comes on. (It is a BRIEF touch. The Power On switch is a Momentary Contact Switch )
Now you have the Power On switch pins.

LED light blinks? You have the Harddrive activity LED. (Light)
LED light stays on? You have the Power On LED. (Light)
Computer restarts? The Restart switch pins.

Short something out? NOPE. You can't hurt a thing using this method.

4 of those pins are for an internal speaker. (To hear BIOS Beep Codes with)

That's 12 of those 18 pins. (Probably less. It is two rows of 9 pins, that are stated for the Front Panel header)
4 of those pins probably won't be used.
You won't be using IR. (Infra Remote) (Only uses 2 pins, though)

Most of the time with an 18-pin Front Panel header;

Top Row:
Starting at Left side, going towards Right;
Pins 2, 4, 6, 8, 10, 12, 14, 16, and 18.
May be a pin missing in this row, or two.

Borrom row:
Starting at Left side, going towards Right;
Pins 1, 3, 5, 7, 9, 11, 13, 15, 17, and 19.
Same thing here. May be 1 or 2 pins missing.

Pins 2 and 4 are usually for the Power On LED. (Light Emitting Diode)
Pins 6 and 8 - Power On switch.
Pins 10, 12, 14, and 16 may be for the Internal speaker.
Pins 18, and 20 are usually not used.

Pin 1 and 3 for the HarDDrive activity LED.
Pins 5 and 7 for the Reset switch.

Pin 9 is usually reserved for the factory, and is a 5 Volt test point.
Pins 11, 13, 15, 17 for speaker; or not used. Same with pin 19.

(So speaker pins may be top row, or bottom row. Dunno )

Another thing. This motherboard is old enough to be using a 3 wire LED, or dual color; for the Power On LED.
LED usually had the colors Green and Yellow.
Yellow for 'Normal' mode, Green for 'Turbo' mode.

(Which is a bunch of cr@p.
Green LED, or Turbo Mode; was actually NORMAL.
Normal mode was the computer operating BELOW the Normal mode)

So pins 2, 4, and 6, may be for a 3 wire Power On LED.

Regards,
joecoolvette

Dec 22, 2012 | Chaintech 9VJL3 P4(478)/VIA Motherboard

1 Answer

Mother board manual for Chiantech VNF4 Ultra


http://www.motherboards.org/mobot/motherboards_d/Chaintech/VNF4%2BUltra%2BZENITH%2BVE/

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.

Motherboard installed in computer case, (Processor to the Top, Ram Memory slots to the Right), the Front Panel header is at the Bottom/Right corner,

http://img.neoseeker.com/v_image.php?articleid=1773&image=24

Black rectangle of plastic with 17 contact pins. Top row has 9 pins, Bottom row has 8.

Notice that the Bottom row has a White triangle pointing to the first pin.
This triangle points to Number 1 pin.

Top row has 9 pins.
Starting on the LEFT side going across to the Right;
Pins 2, 4, 6, 8, 10, 12, 14, 16, and 18.

Bottom row has 8 pins.
Starting on the LEFT side going across to the Right;
Pins 1, 3, 5, 7, 11, 13, NO PIN, and 17.

A) Pins 1 and 2 are for the Green Button. This is also the Standby button.
Let's discuss this for a moment............
Myself I wouldn't connect to it.

B) Pins 3 and 4 are for the HarDDrive activity LED.
(Light Emitting Diode, so to call it an LED light is redundant)
Pin 3 is for the Positive ( + ) wire.
If the HDD LED is dim when the Harddrive is active, switch the wires around.

C) Pins 6, 8, 10, and 12 are for an internal speaker. Used so the computer can generate BIOS Beep Codes.
Doesn't indicate which pin is for the Positive ( + ) wire, but with most motherboard speaker setups, Pin 6 would be for the Positive ( + ) wire, and Pin 12 for the Negative ( - ) wire.

D) Pins 5, 7, and 9 are for the Power On LED.
Notice there are 3 pins. This is used for a dual color Power On LED light.
Usually a Green/Yellow.
Pin 9 is for the Positive wire.

Two wire Power On LED? Positive wire goes to Pin 7, or Pin 9. I believe both to be a Positive connection.
Pin 5 I believe to be the Negative connection. ( - )

(I suggest connecting the Negative wire to Pin 5. Then connect the Positive wire to Pin 9. Not very bright? Put it over to Pin 7 )

E) Pins 11 and 13 are for the Power On switch.

F) Pins 14 and 16 are for a Reset switch, IF a Reset switch is used.

G) N/C for Pin 17. No Connection.

H) N/C for Pin 18. No Connection.

Here's the full review starting from Page 1 detailing the motherboard,

http://www.neoseeker.com/Articles/Hardware/Reviews/vnf4ultra/

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

Aug 27, 2012 | Chaintech VNF4/Ultra ZENITH VE Motherboard

1 Answer

Foxconn - 915P7AC-8KS i dont kbow where to put the


Do Not know if this correct. What will happen if I'm wrong? We'll start over, and we will use a basic method;

Looking at the motherboard installed in the computer;
The Processor is to the Top, Ram Memory slots to the Right, (Yellow, and Blue), white long PCI slots to the Bottom.

To the right of the white PCI slots are 4 Red SATA connectors.
To the right of them is the black rectangular Front Panel header.

[ 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 ]

There are two columns of contact pins.
On the Left side is NO pin, and then 4 pins.
On the Right side are 5 pins.

Pins on the Left side are numbered ODD.
Pins on the Right side are numbered EVEN.

Starting on the Left side, coming Down from the Top;
NO pin, pin 3, pin 5, pin 7, and pin 9.

Starting on the Right side, coming Down from the Top;
Pin 2, pin 4, pin 6, pin 8, and pin 10.

A) Pins 3 and 5 are used for the Power On switch.

B) Pins 7 and 9 are used for the Power On LED (Light)
Pin 7 is for the Positive ( + ) wire.
If the Power On LED is dim when the computer is on, switch the wires around.

C) Pin 2 is N/C. Not Connected

D) Pins 4 and 6 are for a Reset switch, IF a Reset switch is used.

E) Pins 8 and 10 are for the HarDDrive activity LED. (Light)
Pin 8 is for the Positive ( + ) wire.
If the HDD LED is dim when the Harddrive is active, switch the wires around.

Regards,
joecoolvette

Jul 28, 2012 | Motherboards

1 Answer

Wire diagram


The front of your computer is the Front Panel.
The area of contact pins on the motherboard, that the wires from the Front Panel go to, is the Front Panel header.

Specifically we are talking about the Reset switch, Power On switch, HarDDrive activity LED light, and Power On LED light.
Speaker pins for an onboard speaker< (BIOS Beep Codes), may be also included in this header.

What you need is a Front Panel header pinout.

I'm looking at the motherboard now,

http://www.motherboards.org/imageview.html?i=/images/mobot/motherboards/6335.jpg

The silkscreen print next to the Front panel header, is fuzzy. Probably is on your motherboard also.

[Motherboard installed in computer case, the Front panel header is at the Bottom/Right corner. Just wanted you to know, I KNOW.

The photo has the motherboard turned 90 degrees to the Right.
PANEL is silkscreened to the Right of the Front Panel header ]

Looking at the motherboard installed in the computer case, the Front Panel header is two rows of pins.

The pins have a white rectangle silkscreened around them. To the left of these two rows of 10 pins, is another small rectangle in white.
These are for IrDA,
(6 pins. Two rows of 3 pins)

http://www.webopedia.com/TERM/I/IrDA.html

Suggest leave them alone.

There are 20 pins. Two rows of 10 pins for the Front panel header.
Willing to bet Pin 1 is the pin to the upper Left corner.
Pin 20 is the pin at the bottom Right corner.

Coming from the Left side, across the Top row;
Pins 1, 3, 5, 7, 9, 11, 13, 15, 17, and 19.

Coming from the Left side, across the Bottom row;
Pins 2, 4, 6, 8, 10, 12, 14, 16, 18, and 20.

It looks as though this is just the old Front Panel header setup, used for a lot of old motherboards.

For example, I can just about make out the pins for the HDD activity LED light.
Bottom row, come from the Left side.

The first three pins, which are pins 2, 4, and 6, are for the Keylock.
DO not connect any wires to them!
The next two pins, 8 and 10 are for the HarDDRive activity LED.

Top row; Pins 5 and 7 look like they are for the Power On LED.

HOWEVER, let's use deductive reasoning based on intelligent thought.
Or in otherwords, 'Wing it'.

All you have to do, is get one of those LED lights that have two wires.
This will be your test unit.

Go across the Top row. Touch TWO pins at a time. For example Pins 1 and 3. No power? Touch pins 5 and 7. No power?
(Shouldn't be)

Touch pins 9 and 11, and so on. Keep going across the Top row.
No good? Go across the bottom row, BUT SKIP pins 2 and 4.

What will happen? When you finally touch, the two pins for the Power On switch, the LED light will light up, and the Power Supply will turn on.

With the Power Supply on you can go back, and see which two pins keep the test LED light ON. These pins will be for the Power On LED.

Test LED light blinks? You are touching the pins for the HarDDrive activity LED.

Windows is running, and you touch two pins, and Windows restarts?
You have the pins for the Reset switch.

Speaker pins will be FOUR pins in a row, and by finding the rest of the pins, you will know which ones these are.

BY using the LED light you will harm NOTHING. In fact you could use a jumper wire. If you touch the wrong pins, NOTHING will happen. If you touch the two pins for the Power On switch, the Power Supply will come on.

Shock Hazard:
The VOLTAGE is 5 Volt DC.
In comparison two D cell flashlight batteries store 3 Volts DC.

In otherwords; NONE.

For additional questions please post in a Comment.
It may be hard for you to navigate around this website, but would appreciate hearing back from you.

Perhaps you can post a Front Panel header pinout, for this motherboard, and be somebodies hero.

Just a thought.

Regards,
joecoolvette

Jun 22, 2012 | AOpen MX36LE-UN (91.89Q10.101) Motherboard

1 Answer

I have an MS-7502VER:1.2 motherboard and i cannot find wher to plug the power switch into


Hi scouts692

The Front Panel Header Pin arrangement for this motherboard is unusual, in that the header only appears to have 8 pins in a single column rather 2 parallel columns of 6 Pins with 1 blank, as most conventional motherboards do.

Pin 1 is POWER SWITCH orange or red (PWR SW 1)
Pin 2 is POWER SWITCH white or black (PWR SW 2)
Pin 3 is POWER LAD + (PWR LED -)
Pin 4 is POWER LED - (PWR LED +)
Pin 5 is HARD DRIVE LED - (HD LED -)
Pin 6 is HARD DRIVE LED + (HD LED +)
Pin 7 is RESET SWITCH blue or green (RST SW/RST 1)
Pin 8 is RESET SWITCH white or black (RST SW/RST 2)

Please refer to a PDF of the Motherboard Manual for additional information about the setup of this motherboard (the relevant page for the Front Panel Header is page 17/Section 2-13)

hope this helps.

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Sep 17, 2011 | Intel Motherboard

1 Answer

Mercury Motherboard PI845GLM-L manual needed for wire connections... please help me


If my information is correct;

Orient the motherboard so that we are both looking at it in the same direction,
Processor to the top, Ram Memory slots to the right, white PCI slots to the bottom.

The front plastic panel of your computer that has the Power On button, Harddrive activity LED light, and Power On LED light, is the Front Panel.

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

The Front Panel header is all the way down on the right corner. Panel 1.

The Front Panel header, or Panel 1, is a rectangular block that is positioned lengthwise, across the bottom of the motherboard.

There are 4 pins across the Top, and 5 pins across the Bottom.

The pins are numbered.
They are numbered Even across the Top row.
Pins 2, 4, 6, and 8. (There is NO Pin 10. Just a blank spot)

They are numbered Odd across the Bottom row.
Pins 1, 3, 5, 7, and 9.

A) Pins 1 and 3 are for the HarDDrive activity LED light. (HDD LED)
Pin 1 is for the Positive wire. ( + )
{ Pin 2 is for the Negative wire. ( - ) }

If the LED light is dim when operating, turn the wires around.

B) Pins 5 and 7 are for a Reset switch, (Reset button), IF a Reset switch is used.
Pin 5 is for the Negative wire

C) Pin 9 is RVSD_DNU
Reserved Do Not Use.

D) Pins 2 and 4 are for the Power On LED light.
Pin 2 is for the Positive ( + ) wire.

If the LED light is dim turn the wires around.

E) Pins 6 and 8 are for the Power On switch.

For additional questions please post in a Comment.

Regards,
joecoolvette

Sep 16, 2011 | Mercury P4VM800M7 Motherboard

2 Answers

Connecting the case to my motherboard


Pin arrangment is Industry Standard Architecture.....

pwr led pwr sw N/C
X X X X O

X X X X O

hdd rst N/C

translated this is top row left to right ...... power led, power switch no connection

Bottom row is left to right........ hard drive, reset, no connection

Note: not all computer cases have a reset button, also the connectors for power led and hard drive produce a light, if the light does not show, power off the pc swithc the cable rooun 180deg on the connector pins and reconnect.

Dec 04, 2008 | Motherboards

2 Answers

Front panel connections


Hi sjcrofts,
The most common problem for most people is knowing what wire color is positive & which wire color is negative. The colors blue, red, green, light blue, light red & light green are normally positive. The color white & black are negative. Your board uses only 2-pin connectors. The 3-pin power connector can be turned into a 2-pin connector to work with the M848ALU pins.
(Page 13, PANEL1). How to? Take the three pin connector, on the back side of the connector you'll see a small tab that holds the wire into the connector. Use a needle & pull tab up while pulling the wire out at the same time. The wire should slide out. Insert the wire back into the connector next to the other wire. You do not need to hook up the SUS led which stands for suspend.

dff74fa.jpg

Pin 1 is positive & the manual shows this by adding the _P = positive.
Pin 3 which is to the right of pin 1, is negative for the hard drive led. Pins 9 & 10 are not used.

Good luck sjcrofts!
Mike

Nov 30, 2008 | PC Chips M848ALU Motherboard

1 Answer

Power and reset switch and hdd led layout on P4Vmm2 mother board


[10][ 9] Pin 1 = +HDD pin 3 = -HDD LED
[ 8][ 7] Pin 2 = + POWER pin 4 = - power LED (SPD)
[ 6][ 5] Pins 5 & 7 = reset
[ 4][ 3] Pins 6 & 8 = Power switch
[ 2][ 1]


Hope you find this Useful

Dave

Nov 19, 2008 | EliteGroup P4VMM2 Motherboard

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