Question about E-Machines T2792 PC Desktop

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Pwr sup what pins to jump on mb plug to check old atx pwr sup

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  • dan dwyer Feb 15, 2008

    Tried a new power supply which did not work.

    It does not turn on and the supply fan does not turn on so I thought it may be the cicuit from the case start button.

  • dan gillum May 11, 2010

    Request Information

    by dan111353, posted on Feb 26, 2008
    hello buschcris1:this is dan111353 seen your power supply tester you posted .can you tell me where to get one?

  • dan gillum May 11, 2010

    hello buschcris1:this is dan111353 seen your power supply tester you posted .can you tell me where to get one?

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Buy a new Power suply, they can carry a high voltage charge in there capacitors even after being unplugged and messing with it can get you fried, I did it once in my younger days and it feels terrible. Thankfully it was a small one.

Posted on Feb 15, 2008

  • Chris Busch
    Chris Busch Feb 16, 2008

    depending on the main board you have, alot of times on the set of pins, it will say PWR, RST, and so forth which tells you where to put the pins. is the mainboard installed right also, it shouldnt come in contact with the case directly, there should be plastic or those brass pins that lift it from the case, If you gorund t out you may end up shorting the board.



    Heres the best thing to do. Kepp the receipt for the Power supply so you can return it if its not bad. At my job i use a power tester. I got one for $13 and i use it on Dells and Gateways.



    It has a plug on it where the power supplys ATX plug, plugs into, you plug the four pin square plug into the board like normal and if the board is good all the green lights come on and stay consistant, if not, then the board is bad. now if its just that little switch, good luck finding just that exact switch, but if your so inclined, just buy any old switch and make one.



    heres what the power tester looks like. See pics below.

    Mine has connectors to test a floppy and sata power connections also, so thats what the extra ones are for in case your wondering.



    Unfortunately If the board you have is an off brand MObo, then getting the specs may be difficult but if its a lnown brand, usually you can find it on a there website.



    most pins on the mainboard are labels somehow. there usually in a group and labeled like i said, usually a +_and a Negative, one will say HDD for the hard drive light that blinks when its turned on. you can try guessing till you get it, i had to do that once on a really old MOBO.










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No power from gigabyte motherboard


Nope

Just basic diagnostic tools

First thing to check IS the Power Supply.
Then the diagnosis goes on.

So far all you have told me is an assumption. You ASSUME the Power Supply is OK.

Don't.

1) If ALL of the LED's 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 draw from 51 to 125 Watts of power.
Just depends on what Processor it is,

By having JUST the CPU on the motherboard, and the fan on the Power Supply doesn't work; you have just PROVED that.

Do you have a multimeter?
An economical one can be purchased for as little as $5 to $12.
Available in a multitude of stores.

There are 3 main voltages to check. Check while PSU is plugged into mobo. (Power Supply Unit; MOtherBOard)

A) 3.3 Volts
B) 5 Volts
C) 12 Volts
All are DC Voltage. (Dotted line over a solid line for Multimeter)

http://www.playtool.com/pages/psuconnectors/connectors.html#atxmain24

The Orange wires are 3.3 Volts
The Red wires are 5 Volts
The Yellow wires are 12 Volts. All are DC Voltage. (DCV)

The 24-pin ATX main power cable is left plugged into the mobo.
The BACK of the power cable's connector; is where the wires go in.

Power Supply unplugged from power; a straightened out paperclip is inserted down into the socket hole with an Orange wire in it.
The paperclip slides down alongside the insulation of the Orange wire, and touches a metal female terminal.

Every wire going into the 24-pin ATX main power cable's connector, ends in a Molex female metal terminal,

http://www.molex.com/molex/products/datasheet.jsp?part=active/0002081202_CRIMP_TERMINALS.xml&channel=Products&Lang=en-US

The brass tip openings can be seen, in the Playtool link's middle photo. (Tip openings; Front. Paperclip touches Back)
MUST touch that metal terminal.

Another paperclip is slid down into ANY socket hole, with a Black wires in it.
ALL Black wires are Ground wires.

Making sure the paperclip jumper wires, are of the correct length by cutting; there is no way they will accidentally touch each other.

Positive (Red) probe lead of multimeter to Orange wire paperclip;
Negative (Black) probe lead of multimeter to Black wire paperclip.
You should read 3.3 Volts (DC)

Do the same for the Red - 5 Volt wire. Red wire and Black wire.
12 Volt - Yellow wire and Black wire.

Post back in a Comment.
Regards,
joecoolvette

On another note;
Did you just recently mount the mobo to the computer case?
Did you use metal Standoff's, or plastic Spacers?
(Standoff - Hex shaped brass piece, usually 1/2 inch tall; and with a threaded hole on one end, and a threaded shaft on the other)

The Support Plate can be a separate metal plate; or is an integral part of the computer case.

IF, there is a Standoff on the Support Plate, that is NOT lined up to a motherboard mounting hole, it can touch exposed solder joints on the bottom of the motherboard.

This will short circuit the motherboard. MOST of the time when the 'offending' Standoff is removed; everything is OK.

Dec 25, 2012 | Computers & Internet

2 Answers

I've got a new Gigabyte Ga-M68Mt-D3 mobo paired with a cooler master 460 watt power supple. Cpu is Amd phenom II 3.2 ghz with 4 gig of DDR3 ram. I powered up the supply attached to my ATX power supply...


Most motherboards now have a 24-pin power supply connector. If you haven't already found a diagram showing the pinouts of the 20- and 24-pin power plugs, here's one borrowed from a handy site:

pgh_pa_guy_1.jpg

The two plugs are essentially the same, but the 24-pin version duplicates some voltages on the extra pins. The extra pins in the larger connector were meant to provide extra current paths for voltages that see heavy loads from newer processors and motherboard circuitry. Depending on how a motherboard is designed, it might work with a 20-pin plug connected (leaving pins 11, 12, 23 and 24 empty). But typically if the board has a 24-pin connector it needs the 24-pin power supply plug.

Most power supplies have a 20-pin plug with a separate 4-pin section that fastens to it for connection to a 24-pin mobo connector. It typically has one side designed to slide onto the end of the 20-pin plug, essentially turning it into the 24-pin version. This added plug does not have a retaining clamp on its side, so you can tell it from the the 4-pin CPU power plug. The wire colors are also different. For reference, here is the processor power plug, from the same website:

pgh_pa_guy_2.jpg
New motherboard specs call for the separate processor power connector for the same reason the extra pins were added to the power supply connector: to handle the high currents needed by increasingly faster CPUs.

When the motherboard has these connectors, you need to use them all to get everything working. Hope this helps. Thanks to smspowersupply.com for the diagrams, and thank you for using Fixya.

moz-screenshot-1.png

Nov 19, 2010 | Computers & Internet

1 Answer

Do I plug in BOTH the 20+4 ATX power connector AND the 8 pin 12V connector on a gigbyte MB (MA790GPT-UD3h)?


Hi

You only need to plug the 20+4 ATX power connector and how about the 8 pin 12V connector? Well that is use only for legacy type of motherboard that use to require it.

Hope it helps..

Thanks for reaching Fixya

Apr 03, 2010 | Gigabyte GA-MA790FX-DQ6 AMD Phenom Socket...

2 Answers

How do I plug the Power Button wire into the motherboard?


Printed on the MB
HD LED +1 -3
PWR LED +2 -4
RESET 5- 7+ (Why the changed order? & there's no reset button on this computer.)
PWR ON +6 -8

There are nine pins with a little triangle pointing at one and a 2 next to another.
The pins on the MB look like this:

2ndpin
. . . .
. . . . .
1st pin


Found some info on the 506GR. Unfortunately Gateway is keeping the service manual a big secret.

This will help. Thanks please keep updated. please do rate the solution positively .Thank you for using Fixya

Regards
manish

Mar 24, 2010 | Computers & Internet

2 Answers

System won't turn on but when i pushg down on one side of the power suply connectore the fan starts running but computer stioll won't turn on it used to boot up then opne day stopped


It sounds like you have a faulty connector - I would return the item under warranty. Otherwise, if it is out of warranty, you will have to source a new motherboard.

Nov 23, 2009 | ASUS COMPUTER INTL P5SD2-VM MBD MATX LGA...

2 Answers

Instructions on atx case wiring to motherboard


Assuming that the computer is laying down on it's right side, and you are viewing the F panel (the front panel header) from the right side of the motherboard (the bottom of the computer), pin 1 is on the bottom left of the F panel, pin 2 is on the top left, pin 9 is on the lower right, and pin 10 is on the top right (no actual pin)...

1 HD_LED_P Hard disk LED (+) 2 FP PWR/SLP *MSG LED (+)
3 HD_LED_N Hard disk LED (-)
5 RST_SW_N Reset Switch (-)
7 RST_SW_P Reset Switch (+)
9 RSVD Reserved
4 FP PWR/SLP *MSG LED (-)
6 PWR_SW_P Power Switch (+)
8 PWR_SW_N Power Switch (-)
10 Key No pin

Usually the wires and the pins are color coded, (the colored ones being positive.) Sometimes the connections are written in very small abbreviations on the motherboard.

Jan 28, 2009 | EliteGroup ECS A780GM-A Motherboard - AMD...

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

1 Answer

Building new computer


CHECK THE MOTHERBOARD MANUAL FOR THE EXACT INSTRUCTONS!!!!

May 22, 2008 | Computers & Internet

1 Answer

NEED TO KNOW WIRING


i have been to fic's web site, i cannot find any mb labeled au31.

do you have anymore information about the board, how old, which processor, what socket, which north bridge, south bridge, which model system, etc?

 

however the pins are usually marked "pwr sw" or "pwr" and are usually with all the other front panel connector pins.

Oct 17, 2007 | E-Machines eMachines Desktop PC

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