How to replace atx power source

Emachines D2346 desktop
December 13, 2010 at 15:29:47
Specs: Windows xp
I haqve a Emachine model D2346 and i am replacing the atx power source with a Diablo lek DA Series 359 watt power supply.I have one 4 pin wire that plugs in to the motherboard and i need to know the exact position.It also has a plastic locking tab so i just need to know proper location on motherboard. Thanks

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#1
December 13, 2010 at 15:37:45
If the board is a p3 then you dont need the plug

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#2
December 13, 2010 at 15:43:43
I don"t know if its a p3 board but the original power was plugged into the motherboard but in the process of swapping out the power supply this plug came loose from mb and i just want to be certain to plug in correctly. The plug has two yellow wires and two black wires. Thanks

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#3
December 13, 2010 at 15:49:51
It will only go in one way.

If you look at both the motherboard and PSU cable connectors there will be a tab on the motherboard and a catch on the cable end.

Additionally if you look end on at the PSU cable connector a couple of pin housing will be rounded and a couple square. The same on the the motherboard end.

Hope it helps.

___________________________________________
When everything else fails, read the instructions.


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Related Solutions

#4
December 13, 2010 at 15:58:27
Thanks--i will take a look and i will let you know.

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#5
December 13, 2010 at 16:07:06
I hope you don't mean this $15 cheapie:

http://www.tigerdirect.com/applicat...


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#6
December 13, 2010 at 16:26:46
Thanks for the advise--but the plug has 4 square female plugs and the mobo has only 3 pins so i am at a loss. The 3 pins on mobo are inline so there is no way to plug all 4 female plugs on wire to mobo--looks like only two can plug or make contact on mobo??

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#7
December 13, 2010 at 17:06:40
O.K. heres the deal. The mobo has 3 pin connectors in line so can only connect two pins.The original ps also had a 4 pin female connector just like the new one so i assume only two pins connected--but to which of the three pins on mobo??

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#8
December 13, 2010 at 17:08:08

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#9
December 13, 2010 at 17:16:19
http://www.motherboard.cz/mb/fic/am...

This should be your motherboard. It does not have the extra 4 pin 12V connector so do not connect it. The 3 pin connectors you are talking about are for fans. If you connect power to them you will fry the board.

And if you did buy a very cheap powersupply you can look forward to it being no better then the original Bestec unit that has already let you down

Goin' Fishin' (Some day)


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#10
December 13, 2010 at 17:21:02
Motherboards usually require only two plugs from the power supply - the main ATX plug (either 20-pin or 24-pin) & the ATX12V plug (square 4-pin). That's it. The only 3-pin connectors I can think of are for cooling fans. They are for power-out, not power-in.

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#11
December 13, 2010 at 17:30:44
Is this the connector you are referring to?
http://t3.gstatic.com/images?q=tbn:...


and is this the type of 3 pin motherboard connecteor that you are referring to?
http://t1.gstatic.com/images?q=tbn:...
OR this:
http://t3.gstatic.com/images?q=tbn:...

___________________________________________
When everything else fails, read the instructions.


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#12
December 13, 2010 at 17:36:37
If the link in response 9 is to the correct board, it doesn't use the 4-pin ATX12v plug. And the only 3-pin connectors I see are for fans.

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#13
December 13, 2010 at 18:54:06
Yes, the black molex female plug is identical to the one you show. The original had the same plug and was plugged in to the 3 pin mobo. read some other posts where others had same problem. The 3 pins are in line so can only connect two pins and i don't know which pin is the ground on mobo.

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#14
December 13, 2010 at 19:34:52
Richard, thanks for the reply. The replacement ps is the same as original and the original had a 4 square molex plug and was plugged to the mobo at the 3 pin connection. On the molex plug it has (ps) on it indicating power supply so mit has to be hooked up. The molex has 2 yellow wires and two black wires. Black is the ground wire
i cannot see which pin on the mobo is the ground pin. The original was plugged to this connection and worked o.k. for five years.

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#15
December 13, 2010 at 20:49:58
Here's a diagram of your motherboard with all the connectors labeled:

http://h20000.www2.hp.com/bc/docs/s...

Where does the 4-pin plug connect? Answer - it doesn't! There is no place for it. Do NOT plug it into a fan header or you will fry the board.


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#16
December 14, 2010 at 13:44:06
O.K. i have tested the new power source and it is good but i do not get power through the mobo . When i push the power button i get nothing--no lights and no sound. There are several wires coming from the front of the computer and i cannot tell which ones are the switch. What color would those wires be for the switch and how many? If i can determine where on the mobo the switch is plugged i can unplug and jumper the posts to test whether switch is bad.Could be mobo failure. Thanks for any suggestions.

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#17
December 14, 2010 at 14:15:33
It is highly unlikely the switch is faulty. If you are getting no response from the system then it is highly likely something else was damaged when the original powersupply blew. Did it go with a bang? I ask this because I've seen several systems go that way. In one the resultant power surge burned out the motherboard, CPU and several PCI cards. The only thing I salvaged was drive & ram.

Unless you have an available supply of compatible spare parts you could end up spending a small fortune rebuilding.

As far as identifying the power-on header pins they are located adjacent to the CMOS battery close to the edge of the board. Here's your motherboard manual and on about page 13 you will find the pinout for the front panel connectors:
http://www.elhvb.com/mboards/OEM/HP...

Goin' Fishin' (Some day)


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#18
December 14, 2010 at 15:51:08
Hey Richard--thanks for all the input. I located the power button and wire location on mobo. i unplugged it and shorted across the pins and got nothing so i think the mobo is toast and i think i will junk it --too much cost to rebuild--just not practical to continue. Thanks again for your assist.

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