Question about MSI K8MM-V Motherboard

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MS-7142 motherboard:connecting jusb1 and jusb2 from panel of emachine

MS-7142 motherboard, usb1 and usb2 connection from front panel, cannot seem to find a pin system like the small black connector I have in my hand, 10 holes minus 1 filled not on the corners. Novice

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  • byrgudin May 21, 2009

    Thanks for the help, I had tried several times to access the manual at msi website, couldn't get to that page without your link.Problem solved, it was the audio plug.

    Thanks Novice/Byrgudin


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I have had some pretty good luck using MSI motherboards.

If you follow this link, you will be able to download your drivers and owner's manual for your motherboard.

You'll find a picture in the manual with instructions for those front USB ports.

good luck

Posted on May 20, 2009

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I would like you to go here, and download the Motherboard Manual for the MSI MS-7142, (Also known as MSI K8MM-V 1.0)
(The V stands for Version. This is the 1.0 version of the K8MM motherboard. Just some info, I thought I would throw in)

(If the above, does not come up as a link you just click on, simply copy it, and paste it into your address bar, then press the Enter key)
On the e4allupgraders page, scroll down to the bottom of the page. Under the -> Manual heading, click on -> <- that is in green.
(Not trying to insult your intelligence with all of this, just don't want to leave room for error)

You will see a small window pop-up. Make sure the empty circle that is to the left of -> Save File, has a green dot in it. If not, put your mouse cursor in the empty circle, left-click one time. Then go below to the right, and click on OK

If you do not have your downloads set to be saved in your My Documents folder, (Start>My Documents), this saved Zip file will go to your desktop screen. (Yellow folder with
under it) In either place it is saved in, double-click on this folder.
Now go up to the top left, and click on -> Extract All Files
In the 'wizard' window, click on Next. Click on Next again. Click on Finish.
Now go up and click on MS7142v1.0.pdf

There's your Motherboard Manual!
Page 5 shows you the JUSB1 and JUSB2 pins. Orient the motherboard. Processor is at the top, ram memory slots are to the right, there are three white PCI slots at the bottom.
Under the last PCI slot, (PCI 3), and to the far right of it, is the JUSB1 header. (Connector on a motherboard, is referred to as a Header) To the right of JUSB1 is JUSB2.
Jumper USB1, Jumper USB2)

Top row. NO pin, then there are 4 pins.Bottom row. 5 pins going across, on each USB header.

Posted on May 20, 2009

  • joecoolvette
    joecoolvette May 21, 2009

    You're welcome! Would appreciate it if you would rate my solution.


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Motherboard wiring for t6532

eMachines T6532 uses an MSI MS-7207 motherboard.
Also known as the MSI K8NGM2-L,

Scroll down a little, hover your mouse cursor on the Download tab.
(Overview / Specifications / Download / Support / etc)

In the drop down list click on - Manual

Scroll down a little. Under the Download subheading, click on the blue -

[Version 2.0 / English / 7.1MB / 2006 - 05 - 24 ]

Click on the country name nearest yours.

A small window will come up -

Make SURE there is a Green dot in the small circle, to the left of Save File.
If Not; left-click in the small empty circle to the left of Save File.

Go below in the small window, and click on OK.
A small download window will come up.
Allow the file to fully download, then DOUBLE-click right on the file name.

In the next small window go to the far left, click on -
Extract all files.
At the bottom of the next 3 small windows, JUST click on Next, Next, and Finish.

In the last small window DOUBLE-click on the file name - 7207v2.0(G52-M7207X5)

There is the motherboard manual

Example A;

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.
(Power On switch, Power On LED light, HarDDrive activity LED light, and Reset switch IF used)

The Front Panel header is JFP1, in the bottom/right corner of the motherboard.

Two rows of contact pins.
4 on the Top row.
5 on the Bottom row.

Pins across the Top row are numbered EVEN.
Pins across the Bottom row are numbered ODD.

Starting from the Left side going towards the Right, Top row;
Pins 2, 4, 6, and 8. There is NO Pin 10.

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

A) Pins 1 and 3 are for the HarDDrive activity LED light.
Pin 1 is for the Positive ( + ) wire.
If the HDD LED is dim when the Harddrive is active, switch the wires around.

B) Pins 5 and 7 are for a Reset switch, IF a Reset switch is used.

C) Pin 9 is N/C. Not Connected
It is reserved for the factory to use.
(Believe 5 Volt test point)

D) Pins 2 and 4 are used for a Power On LED, that has two wires.
Pin 2 is for the Positive ( + ) wire.
If the PWR LED is dim when the computer is on, switch the wires around.

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

JFP2, or also known as Junction Front Panel 2; is above JFP1, and is situated Vertically, instead of Horizontally like JFP1.

(Below purple SATA data cable connector/ Right; and to the immediate right of the CMOS battery))

4 pins on the Left side, 3 pins on the Right side.
Pins on Left side are numbered EVEN.
Pins on Right side are numbered ODD.

Starting at Top of Left side coming down;
Pins 8, 6, 4, and 2.

Starting at the Top of the Right side coming down;
NO Pin 7, pin 5, pin 3, and pin 1.

Pins 2 , 4, 6, and 8 are for an internal speaker. Used to hear BIOS Beep Codes.

Pins 1, 3, and 5 are for a Power On LED light, that has 3 wires.
Used for a dual color Power On LED light.
For example Turbo Mode is Green, and Normal Mode is Yellow.

(Which was cr@p.
Turbo mode was actually normal, while normal was slower)

Example B)
Front panel USB ports. (Connectors)
JUSB1 and JUSB2.

EACH USB header supports TWO USB ports.

Look at the pinout on Page 40.
VCC, USB4-, USB4+, and Ground; is one USB connector. (port)
VCC, USB5-, USB5+, and Ground; is a second USB connector. (port)

Note the USB4-, and USB4+; and the USB5-, and USB5+

Now look at a USB pinout. Male and Female,

VCC = +5 Volt
USB4- and USB5- = -Data
USB4+ and USB5+ = +Data
GND is Ground.

You can have 4 USB ports in the Front Panel, or add extra ones to the rear panel. (I/O area)

ONE of those USB headers; JUSB1 or JUSB2; can be used for a Card Reader.
A Card Reader has Two USB cables, and uses One USB header on the motherboard.

Which one? Junction USB1, or Junction USB2?
Pick one.
Doesn't matter.
BIOS will set an IRQ for it.
(Interrupt ReQuest)

For additional questions please post in a Comment.

Mar 02, 2013 | eMachines Computers & Internet

1 Answer

Do you have any user manual for front panel usb

(MSI PM8M-V H, is version 2.0 )

Hover your mouse cursor on the Download tab.
(Overview / Specification / Download / Support / etc.)

In the drop down list, click on - Manual
Under the subheading - Download, click on the blue -

[ This is a Zip file. A Zip file is a file that is compressed, to send easier. The above manual is for the M7104v1.0
It will work for the version 2.0 also.

You need a program to 'Unzip' it. (Decompress)
If WinZip is not working on your computer, go to 7-Zip, and download for free.
If you need guidance in downloading, and unzipping, post back in a Comment ]

There are two USB headers on the motherboard for the Front Panel,
JUSB1 and JUSB2. (Junction USB 1 and Junction USB 2)

Looking along the bottom of the motherboard, FROM the Right going towards the Left;

JFP1 header; (Front Panel main wires)
Header with 4 pins on the Top row, and 5 pins on the Bottom row.

JFP2 header; (Dual color Power On LED, and Speaker)
Header with 4 pins on the Top row, {Speaker}, and 3 pins on the Bottom row.

JUSB2 header.

JUSB1 header.

EACH USB header will support TWO USB ports in the Front Panel.
JUSB1 supports two,
JUSB2 supports two.

For each USB header there are 5 pins across the Top, 4 pins across the Bottom.
The pins are numbered EVEN across the Top, and ODD across the Bottom.

Starting from the LEFT side going across to the RIGHT side;
on the TOP row for JUSB2 and JUSB1;
Pins 2, 4, 6, 8 and 10.

Starting from the LEFT side going across to the RIGHT side;
on the BOTTOM row for JUSB1 and JUSB2;
Pins 1, 3, 5, and 7. There is NO pin 9.

A) Pin 2 is VCC
B) Pin 4 is USB1-
C) Pin 6 is USB1+
D) Pin 8 is Ground

E) Pin 10 is USBOC

Pin 10 is N/C -> Not Connected.
It is there, and Pin 9 is not there, to key which way a connector can go on. Only ONE way.

F) Pin 1 is VCC
G) Pin 3 is USB0-
H) Pin 5 is USB0+
I) Pin 7 is Ground

There is NO pin 9.

(The USB technology used is USB 2.0)

Let's read together,
Under - USB pinout signals;

"USB is a serial bus. It uses 4 shielded wires: two for power (+5v & GND) and two for differential data signals (labeled as D+ and D- in pinout). NRZI (Non Return to Zero Invert) encoding scheme used to send data with a sync field to synchronise the host, and receiver clocks. In USB data cable Data+ and Data- signals are transmitted on a twisted pair. No termination needed. Half-duplex differential signaling helps to combat the effects of electromagnetic noise on longer lines. Contrary to popular belief, D+ and D- operate together; they are not separate simplex connections."

See the USB examples in the link above, where it labels the contact pins?
The MALE connectors are shown on the Left side.
The FEMALE connectors are shown on the Right side.

Your USB ports will be FEMALE, on the Front Panel.
They are also the A style. USB A style. The Top example to the Right.

Just noting the following in case for some reason, the wires coming from those contact pins in the female USB connector, are not color coded correctly;

Even after you have the wires sorted out, as to which contact pins they go to, DOUBLE-check again. Do NOT just go by the color code of the wires.

You do NOT want to accidentally connect the +5 Volts (VCC), to the Ground!

Explaining further;
You connect the VCC wire, (Red), of the USB port in the Front Panel, to the Ground pin on the USB header on the motherboard.

(Which means the Ground wire of the USB port, (Black), will probably also be connected to the VCC pin, on the USB header of the motherboard)

Zzzzzzap! There goes your front USB ports. Both USB front panel headers on the motherboard, will be DONE!

Make sure!

Going on;
1) VCC or Vcc, goes back relating to Transistor technology.
Just think of it as the Positive, or power wire.
It is.
It is 5 Volts DC.

2) GND is Ground. It's a DC circuit, and you have a Positive, and a Negative, or Ground.

3) USB1-
That is -> Data-

USB0 is for one USB port in the Front Panel.
USB1 is for another USB port in the Front Panel.

[ Each USB header on the motherboard can be connected, to TWO USB ports on the Front Panel.
Therefore for the two JUSB1 and JUSB2, you can connect Four USB ports in the Front Panel ]

Data- on one USB port in the Front Panel, goes to USB0-

Data- on the other USB port in the Front Panel, goes to USB1-

4) Data+
Same thing.
Data+ on one of the USB ports in the Front Panel, goes to USB0+
Data+ on the other USB port in the Front Panel, goes to USB1+

EACH side of JUSB1 and JUSB2, will support one USB port on the Front Panel.
Two sides per JUSB1 and JUSB2 = 4 USB ports on the Front Panel.

For additional questions, or clarification to anything I have stated above, please post in a Comment.


Jul 20, 2012 | MSI Computers & Internet

1 Answer

Como conectar los Jumper JUSB1/JUSB2

USB pinout;

Motherboard - MSI H55MP31,

Hover your mouse cursor on Download.
(Overview, Specifications, DOWNLOAD, Support, Where to Buy)

In the drop down list click on - Manual

Left-click on the Blue, (Azul), -

(Multi-Language - User Manual - Motherboard)

Front USB Connector: JUSB1 / JUSB2 / JUSB3

Shows the pinout.


Apr 18, 2012 | MSI H55MP31 LGA 1156 Intel H55 Micro ATX...

1 Answer

Need motherboard pin location power, hdd &

The eMachines W2828 uses an MSI MS-7061 motherboard. Also known as KM3M-V.

This is MSI Support, and the download page for the KM3M-V motherboard manual,

Left-click on the blue - - file name under the Download heading.

On the next page click on the country nearest yours.
A small window will come up.

Be sure the empty circle to the left of Save File, has a green dot in it.
If not, Left-click in the empty circle.
Now go below, and click on OK.

This is a Zip file. Zip files are used to send a large amount of information. The file is condensed.

If you do not have your downloads set to save to your My Documents folder, (Could also go to a sub-folder in My Documents>Downloads), this file will go to your desktop screen.

When you see the file name -, double-click right on it.
On the left side of the screen go up to the top, and left-click on - Extract All Files.
Follow the instructions of the Unzip Wizard.

Barring you have trouble downloading, or opening the file;

Orient the motherboard so the Processor is at the top, and Ram Memory slots are to the right.

Below the CMOS battery is a front panel header > JFP1

(Front Panel is the plastic front part of the computer, the Power On switch, Power On LED, and HDD LED are located)

There are three white PCI slots on the motherboard, below the Processor socket.
The last PCI slot that is closest to the outside edge of the motherboard, is PCI 3.

Below the PCI 3 slot is the AUD1 header. (Audio 1)

Below the right corner of the PCI 3 slot are two more headers.
JUSB1, and JUSB2
These two headers are combined together.

To the right of the JUSB1 and JUSB2 headers is another header.

To the right of the JFP2 header is a header that only has two pins.

To the right of the JC11 header is the JFP1 header.

It is the last horizontal header, and is all the way to the right of the motherboard.
The JFP1 header is parallel to the outside edge of the motherboard.

There are two rows of pins.
Four across the top, then a blank space. (Or no pin)
Five across the bottom.

The pins going across the top of the JFP1 header are numbered Evenly.

Starting at the Left side going towards the right, the pins are numbered 2, 4, 6, 8, and 10.
There is NO pin 10, however

The pins going across the bottom are numbered Odd.

Starting at the Left side going towards the right, the pins are numbered,
1, 3, 5, 7, and 9.

1) Pins 2 and 4 are for the Power LED lamp.

2) Pins 6 and 8 are for the Power On switch

3) Pins 1 and 3 are for the HarDDrive activity LED

4) Pins 5 and 7 are for the Reset switch

May 20, 2010 | Computers & Internet

1 Answer

MSI K8MM-V - Usb on the front case work like usb1 and not usb2.

May be problem on front USB port in CPU.Connection are very loose,so ti can detect.
Change or replace cassing.

Feb 08, 2010 | MSI K8MM-V Motherboard

1 Answer

I have an emachine t3104 and upgraded the memory the wires from the front of the case became un attached now I dont know where they connect on the motherboard they are black and whitebbgreen and white and...

That model has a MSI K8MM-V (MS-7142-010) motherboard. Mostly likely you knocked some of the computer case wire connectors off the motherboard. These connectors usually include things like the case speaker, indicator for your hard drive operating, etc.

You may want to do a websearch for the manual, which will show a detailed breakdown of these wire connections and how to reinstall them.

Aug 28, 2009 | Computers & Internet

1 Answer

EMachine MS-7142 board pin connection diagram needed

easy !!!
this is the manual of your motherboard:

note that MS-7142 is actually K8MM-V (as you can see the filename of the manual is:

Apr 20, 2009 | Computers & Internet

1 Answer

Abit Kg7-Lite motherboard USB2 pin Locations desperately needed!

Lay case down with the bottom in front of you. Looking straight down at the row nearest the case bottom reading right to left there will be two rows of four pins.

Reading right to left the row closets to the case bottom the first lead is vcc1, next usb1-, next usb1+ and grnd1.

Top row reading right to left is vcc2, next usb2-, next usb2+ and grnd2.

I just replaced bad caps on my kg7 and had to remove the motherboard for the repair so I just reinstalled my front case usb ports.

Help this helps.

anon paranoid

Feb 18, 2009 | Abit KG7-Lite Motherboard

2 Answers

E-machine wont start comp

Either the usb is shorted or a device is shorted. U can unplug the usb devices one at a time and reboot to find it or U can open the pc up and unplug the usb connections to the mb. If all the devices R unplugged and it still does it, then it's repair shop time or replacement time.

Jun 08, 2008 | E-Machines eMachines Desktop PC

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