Question about E-Machines eMachines Refurbished EMA SYSTEM BOARD MODEL T2984 eMachines (102257) PC Desktop

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E-Machine will not power up after being moved

Is the front panel wiring for the HDD led, power light, and on switch the same on the T3830 as on the T2990 you posted?

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System board model t2984 emachines pc does not power on. how much for replacement board.

Posted on Oct 22, 2008

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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 | Computers & Internet

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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

How to re-wire a Compaq Presario SR2150NX Case power Switch


The plastic front of your desktop 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.

F_PANEL_1

The Front Panel header contains connections for the Power On switch, Power On LED light, HarDDrive activity LED light, and so on.

http://h10025.www1.hp.com/ewfrf/wc/document?docname=c00864922&tmp_task=prodinfoCategory&cc=us&dlc=en&lang=en&lc=en&product=3339274

(Look at the motherboard photo. The Front Panel header is at the bottom right. Scroll down for the motherboard illustration )

There are 9 contact pins.
4 across the Top row, and 5 across the Bottom row.

The four pins across the Top row are numbered EVEN.

From the Left side going towards the Right side;
Pins 2, 4, 6, and 8. There is NO pin 10, just a blank spot.

The five pins across the Bottom row are numbered ODD.
Pins 1, 3, 5, 7, and 9.

A) Pins 2 and 4 are for the Power On switch

B) Pins 6 and 8 are for the Power On LED

(LED is dim when the computer is on? Switch the wires around )

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

(LED is dim when the harddrive is operating? Switch the wires around)

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

How to know which wires are for the Power On switch, Power On LED, and HDD LED?

Follow the wires into the Front Panel. Remove the Front Panel, and follow them.
(Need guidance removing the Front Panel post in a Comment )

For additional questions please post in a Comment.

Regards,
joecoolvette

May 02, 2012 | HP Compaq Presario SR2150NX PC Desktop

1 Answer

Needed to move motherboard to new case because of overheating / ventilation problems - do not know what the power / reset / hdd led leads are for the 9 pin f_panel (new case has each as separate...


Photo of the Asus M2N78-LA motherboard,

http://h10025.www1.hp.com/ewfrf/wc/document?lc=en&cc=us&docname=c01421635&dlc=en

This photo also shows the orientation (Direction), that the motherboard is sitting in a computer case.

To the very bottom right is the Front Panel header.

The front plastic panel of the computer is the Front Panel.

The area of pins on the motherboard that the cables, (Wires) from the Front Panel connect to, is the Front Panel header. ( F_PANEL )

The Front Panel header, is the black rectangular shaped plastic block, that is sitting vertically on the motherboard.

Has two columns of pins.
4 on the left side, 5 on the right side. Makes it look as though there is a pin missing, at the top left corner.

I'm going to number the pins.

Pins on the Left side starting at the Top, going down;

Pins 1, 3, 5, and 7.

Pins on the Right side starting at the Top, going down,

Pins 2, 4, 6, 8, and 10.


A) Pins 1 and 3 are for the Power On switch. (Power On button)

B) Pins 5 and 7 are for the Power On LED light.
Pin 7 is for the Positive ( + ) wire.
(If the LED light is dim, reverse the wires around)

C) Pins 4 and 6 are for a Reset switch, IF a Reset switch is used. (Reset button)

D) Pins 8 and 10 are for the HarDDrive activity LED light.
Pin 10 is for the Positive wire. ( + )
(If the HDD LED light is dim when operating, switch the wires around)

Pin 2 at the top Right is NOT used. (NC. Not Connected)

For additional questions please post in a Comment.
I am looking at a motherboard manual in PDF file form, for the Asus M2N78-LA motherboard.

Regards,
joecoolvette

Sep 03, 2011 | HEWLETT-PACKARD HP Pegatron M2N78-LA ASUS...

1 Answer

How to hook up the face plate of a emachine w3400 Wich includes 3 wires 1 power butten and 2 led lights


Look at the pinout of the Front Panel header, of the eMachine W3400's motherboard.

The plastic front of the computer is the Front Panel.
The area of pins on the motherboard, that the cables (Wires) from the Front Panel connect to,
is the Front Panel header.

The motherboard for an eMachines W3400 desktop computer is an MSI ms-7145
(Micro Star International)

Orient the motherboard in your view so that we are both looking at it the same way.
Processor to the Top, Ram Memory slots to the Right, white PCI slots (3) to the Bottom.

JFP1 is the Front Panel header.
(Junction Front Panel 1)

JFP1 is on the Bottom Right corner. There are two columns of pins arranged vertically.
(The JFP1 header runs parallel to the Right side of the motherboard)

The Left side column of the JFP1 header is numbered Odd.
Starting at the Top and going Down, the pins are numbered;
1, 3, 5, 7, and 9

The Right side column is numbered Even.
Starting at the Top and going Down, the pins are numbered:
2, 4, 6, and 8.
There is NO Pin 10

A) Pins 1 and 3 are for the HarDDrive Activity LED light. (HDD)
If the LED light is dim will operating switch the wires around

B) Pins 5 and 7 are for the Reset switch. (Reset button)
> IF Used

C) Pin 9 is Not used. (NC. No Connection)

D) Pins 2 and 4 are for the Power On LED light (If dim switch the wires around)

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

Trace the wires back to the Power On switch. Even if it means temporarily removing part of the Front Panel to see.

Same with the LED lights.
See which wires go to the Power On LED, and HDD Activity LED. (Harddrive Activity LED)

Follow the 3 wires, and tell me where they go to on the Front Panel.
USB port?
Memory Card Reader?
Firewire port? (a1394)

Nov 27, 2010 | AMD eMachines Desktop System w/ 17'' CRT...

2 Answers

Had to replace power switch on emachine computer need to know where wires go


You must check cable(small) one the (left or right) one hard drive, CD Drive, floppy disk and for motherboard (the big one) .You check the manuals, is not hard just follow where the power lines.

Feb 21, 2010 | E-Machines eMachines T3830 PC Desktop

1 Answer

NO POWER TO THE MOTHER BOARD OF MY EMACHINE


The Wires goes on the motherboard, check your motherboard manual for reference

Mar 17, 2009 | E-Machines eMachines T3830 PC Desktop

2 Answers

NEED POWER SWITCH WIRING FOR A EMACHINE T-3095


check on the motherboard there should be a small prints on it near control panel.

Mar 05, 2009 | E-Machines eMachines T3830 PC Desktop

1 Answer

Emachines t3830 I need the schematic for MB I umployed the wire for the push bottom without looking at the way they were plug. Now I do not know the correct aligning of the push bottom wires.


If you look at the motherboard there is usually a diagram labeled "FRONT PANEL HDR" that will tell you which pins are for: HDD LED, PWR LED, RESET, PWR ON. etc.
The chart / diagram may be a few inches away from front panel header.
the following example is from my emachine T2893 that I had opened because it won't power up.

the motherboard at the header connector labels pin #2 and with that you can figure out the other
pin numbers

example of diagram on motherboard (Confirm the pin numbers on your motherboard)


J9G1 PINS
| HD LED | 1 - 3 |
| PWR LED | 2 - 4 |
| RESET | 5 - 7 |

| PWR ON | 6 - 8 |

Hope this helps you figure which pins to hook you switch up to.

Jan 18, 2009 | E-Machines eMachines T3830 PC Desktop

2 Answers

The same like everyone but know answers like everyone pw, hhd, power led


have a look on the techguys tab at pcworld.co.uk, you will be able to download the maual from there

Nov 13, 2008 | E-Machines eMachines T3830 PC Desktop

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