Question about E-Machines (308714) Motherboard

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Wires came unplugged

I have put a new power suppy box in my e-machine but 3 wires red,blue nad black came unpluged and I don't know where to plug them back in.HELP!!!!

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Hi the 3 wire connector you have mentioned is for the FAN do not forget to connect it - you can find a 3 pin connector either white / brown in color on the motherboard - plug the 3 pin connector into this - it can be connected in only one direction .

Posted on May 28, 2008

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The monitor turns off, it becomes bluish black, but PC continues to run My PC has a CPU AMD Athlon 64bit X2 Dual Core 5000 AM2 2GB Memory, 500GB partitioned into 3 approximately the same size each. foxconn...

Do you have a substitute Power Supply you can use for a test? May sound inane, but there are those who have an unused computer sitting around due to upgrading, or what have you, and the Power Supply is good, and compatible.

(Compatible: Is the correct size and shape to fit in the computer case, and has the minimum required power cables)

A bad Power Supply with a weak voltage rail will emulate the conditions you have described. Enough power to light LED lights, and maybe spin fans, but not enough power to turn the Processor on, or keep it running.

1) IF all the LED lights were on at once they would use less than 1 Watt of power.

2) EACH fan uses 2 to 3 Watts of power.

3) A typical Processor can use 51 to 125 Watts of power.
AMD Athlon X2 5000+?
Can use up to 89 Watts,

Am I stating to run out, and buy a replacement Power Supply if no substitute is available for a test unit?
Test the voltages of the Power Supply when plugged in, and computer running.

This will require a multimeter. An inexpensive multimeter can be purchased for around $8 to $12.
They are available in a multitude of stores. An auto parts store is one example.

Multimeters come in Analog, or Digital. Doesn't matter which kind you get. I prefer Analog with a needle and scale.

The Red probe lead is the Positive lead.
The Black probe lead is the Negative lead.
The Positive lead always touches the power wire. The Negative probe lead always touches a Ground (Black) wire.

The Function knob is set to DC Voltage. (Symbol is a dotted line over a solid line)
If there is a multi-position, set it to the 0-50 volt scale.

There are three main voltages to test.
1) The 3.3 Volt power rail
2) The 5 Volt power rail
3) The 12 Volt power rail.

In the cables coming from the Power Supply;
Orange insulated wires are 3.3 Volts
Red wires are 5 Volts
Yellow wires are 12 Volts.

You can test ANY of the wires, as they all end in one point for each voltage, in the Power Supply.

All Orange 3.3 Volt wires go back to one central point in the Power Supply.
This is the 3.3 Volt power rail.

All Red 5 Volt wires go back to one central point in the Power Supply.
This is the 5 Volt power rail.

All Yellow wires go back to one central point in the Power Supply.
This is the 12 Volt power rail.

ALL Black wires are Ground wires.

For example;
4-pin standard Peripheral power cable,

The Red wire is 5 Volts. The Yellow wire is 12 Volts. The two Black wires are Ground wires.

4-pin standard Peripheral power cable unplugged, the Positive probe lead is inserted into the Front of the connector to the Red wire. (The Back of the connector is where the wires go in)

Computer plugged in, and turned on.
The Negative probe lead is touched to ANY of the two Black wires.
You should read 5 Volts.

(Shock warning: Two D cell batteries produce 3 Volts DC.
There is no shock to be concerned with. There may be however, a small spark when the Negative probe lead is touched to a Black wire. There may not be a spark)

Same procedure for the Yellow 12 Volt wire.

To test the 3.3 Volt power rail you need an Orange wire. This is in the 24-pin ATX main power cable,

The 24-pin ATX main power cable is left connected to the motherboard. A paper clip is straightened out, then inserted into the Back of the connector.
The back of the connector is where the wires go in.

The paper clip is inserted RIGHT NEXT TO the Orange wire in the socket hole. The paper clip MUST go down in far enough to touch a metal terminal.
At the end of every wire going down into that connector, is a metal terminal end.
It is approximately 3/8ths to 1/2 inch down in the socket hole.

Computer unplugged from power, the paper clip is inserted down into the Orange wire's socket hole.
Computer plugged back into power, and turned on, the Negative probe lead touches ANY Black wire.
Doesn't have to be in the 24-pin ATX main power cable connector.
(However you can use a paper clip on a Black wire in the 24-pin ATX main power cable connector, also. Just be SURE the two paper clips Do Not touch each other. I would connect to a Black wire in an unplugged 4-pin standard Peripheral power cable)

I think it may be Electrolytic Capacitors breaking down in the Power Supply. Causes a weak voltage power rail, or power rails.
Electrolytic Capacitors can also break down on the motherboard,

If we go along with your last statement, which leads me to believe you may think there is a problem with the integrated graphics chipset, (VIA K8M890), then use a graphics card, and bypass the integrated graphics.

Also make sure the inside of the computer is clean.
The two main reasons for computer failure is a bad Power Supply, and a dirty computer inside.

For additional questions please post in a Comment.


Oct 09, 2011 | Foxconn K8M890M2MB-RS2H AM2 VIA K8M890...

2 Answers

Power suppy fried, now new power supply will not power up

a 450 watt power supply will have the extra pins your talking about if this is a newer pc if not you will have to buy older used one on ebay or something to get what you need

Nov 10, 2009 | MSI K8T Neo-FSR Motherboard

1 Answer

Hi all was ok in till i removed my hard drie affter i shut down the system and turn it off i removedthe hard drive now system will not boot back up it will power on but wont boot up ive unpluged everything...

first thing to do is unplug the machine, hold the power button in for 20 sec. after unplugging it, then remove the disc battery you should see in the mother board, keep it out for 60 sec. then replace it plug it back in nad reboot it. lets start from there and get back with me and please don't forget to rank this solution and if I can be of any other help let me know. Have a wonderfull day and thank you for using

Mar 05, 2009 | EliteGroup ECS A780GM-A Motherboard - AMD...

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.


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!

Nov 30, 2008 | PC Chips M848ALU Motherboard

1 Answer

The system fails to boot up after a new power supply was added

There should also be a brand - the nVidia just relates to the chipset that the board uses, but its OK, lets check the wiring first.  If we still have trouble I'll get you to double check for the brand name.
Lets just check that you have the following plugs in place:
  1. The 24 pin plug from the PSU (blue) to your motherboard - this powers the board itself.
  2. A 4 pin 12v P4 connector plugs into the motherboard (near the CPU).  This is the CPU power.  It runs from the 8pin blue socket on the PSU.  Make sure that the end plugging into the motherboard is only 4 pin.
  3. No power cables required to run the 8600GT so the red sockets on the PSU are empty.
  4. Power cables going to all your peripherals (hard drives and CDroms).  These run from the black sockets on the PSU.
Does your current setup match that?

Nov 12, 2008 | EliteGroup NFORCE 570 SLIT-A Motherboard

1 Answer

Connector pulled off power buton wires

Hi ford, the most common case colored wires used for negative - is white. The colors blue, red, green are usually positive +. The internal speaker though it uses a 4 pin connector only plugs onto the 2 end pins. Black is connected to negative - pin & red is connected to + positive pin. (Depending on the MB model).
All these case LED's use 5volts DC. If you make a boo-boo, don't freak out. You can usually shut down the system & turn the connector 180 & re-connect it with out hurting the board. Suggest you connect 1 at a time & check in-between each.

Still having trouble, include the name & model number of the MB.
Good luck!

Sep 28, 2008 | Computers & Internet

2 Answers

Wiring info

Most Mobo's have printing next to the places that are jumpered or pluged into. The ones you need sould be close to the edge of the mobo, that is close to the front {power button} side.

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

1 Answer

Emachines t3882 wont power on

The yellow wire carry 12 volt while the red one is 5 volt. But to check the voltage you have to unplugged all the four wires connectors (yelow, black, black red) and measure them one by one. If you say that they don't have any voltage on them then you have a faulty power supply. Replace it to solve the problem.
But if during unplugged your have the correct voltage read then it could be one of your device faulty. Normally your CD-ROM drive or floppy drive or HDD.

Mar 25, 2008 | Intel D865GVHZ Motherboard

1 Answer


I have one sitting in front of me , unfortunately I cannot get it to you but will be happy to tell you the positions. It's not very difficult to fix and I will stick by until you get it correct. I hope I don't complicate this in an attempt to keep it clear and don't be insulted by my answer. I am guessing you don't have a great deal of experience working inside the box and it can become confusing. This is much easier than the length of this answer suggest. You will do this in about 30 seconds, move anything that is in you way and make a note of where it came from. If your hand is small you are lucky but don't force anything and if you are pushing on anything trying to get down there see what it is before pushing more. Better to move it.

There is a front panel connector that is on the bottom right of the board if you orientate the board by placing the computer access panel in front of you with the front of the computer facing to your right. Then right below the floppy disk controlled socket (the smallest flat cable in the box) if no floppy the empty socket below the battery.
There is a double row of pins, looks like 2 rows of 10 pins each. Mine are multicolored, pink and green etc. and the should be marked + and minus, at least plus. The number 1 pin is on the left. The 1 pin is actually the bottom left and the 2 pin is above it. Back down to the bottom row and pin 3 is right next to 1 and the 4 pin right above it. Pin 3 is the second pin on bottom left. Follow the way it goes? The bottom is 1, 3, 5, 7, 9, 11, 13, 15, 17, 19 and right above 2, 4, 6, 8, 10, 12, 14, 16, 18, 20.

Pin 2 is + so put your Power SW on pin 2 and 4 with the colored wire on pin 2. Colored wire in the pair should be positive, and it can be blue, red, green, mine is red and white.
The Power LED goes right next to the Power SW on pins 6 and 8, the colored wire on pin 6, mine is blue and white. And finally the HDD LED goes on pin 7 and 9. All counting from the left to right. My pins are not marked as I think its not critical how the LED is connected and if it does not light then reverse those 2 pins. My colored wire is on pin 7 and its blue. May as well finish, the Reset button is wired to pins 17 and 19 with 17 being positive and the speaker if you have one hooked up (your tiny internal speaker not for listening to music) is a 4 pin connector with the middle 2 sockets empty and fits over the last 4 pin s on the bottom right. 13, 15, 17, and 19. Pin 13 is +. There may be other wires but I don't know where they go depends on what they are but this is what you need. Good luck. And make sure all is unplugged and touch the box to ground yourself or wear a strap. Look but don't touch is a good rule for now.

Feb 22, 2008 | Computers & Internet

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