Question about System Power Supplies

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Computer Components I have a Hairong ATX-400W power supply in my computer and a component labelled C3 has just burnt out. Can you tell me the specs of this item so as I can source a replacement? Thanks, Murray

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  • Murray Mansfield Oct 07, 2008

    Thanks Lee,

    It is information on a component I need. I realise I can replace it but my philosophy is to repair first, if possible.


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The component, you need to take it with you and show it to someone in electronics repair they can possibly sell you a replacement or direct you to where to get one. I don't have and I don't think there are any service manuals available for computer powersupplys publicly as most people and shops replace them instead of trying to repair.

Posted on Oct 07, 2008

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You can just go to a computer store and get a power supply like this or if you want take the whole power supply with you so you can buy the same one...

Hope that helps........

Posted on Oct 07, 2008

  • Mark Gil
    Mark Gil Oct 07, 2008

    This may help you:



    +5v 20a (red) +3.3v 20A (orange) +12v 10a(yellow) -12v .5A (blue) +5vsb 2a (purple) -5v (white)



    Hope that helps.......

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Is this a component in the power supply itself? If so you will want to just replace the whole power supply it is only about 30$. If you need assistance locating a replacement I would be glad to help. Please take a moment to accept and rate this solution accordingly.
Thanks,
Lee

Posted on Oct 07, 2008

  • Lee A.
    Lee A. Oct 07, 2008

    No matter what your philosophy may be. I don't think it is works in the case of power supply's. Besides their may be other issues, and for the money all the components will be new and under warranty. Also your 400w power supply may be under powering your pc and that could be part of the problem. So for very little you could have a higher watt power supply and time is money and you would spend a lot less time by replacing. I hope you will reconsider your rating and accept and rate the solution appropriately.
    thanks,
    Lee


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My power went out and when it came back on the computer would not come on


eMachines uses low quality hardware components inside their computers. This is the way they can sell them at budget prices.

One main hardware component is the low quality power supply they use.
A generic power supply made by Bestec. (A generic power supply manufacturer)

(PSU. Power Supply Unit. The type of PSU used is a SMPS.
Switched-Mode Power Supply,

http://en.wikipedia.org/wiki/Switched-mode_power_supply )

Low quality;
A) Electrolytic Capacitors (Radial Aluminum Electrolytic Capacitor)
B) Rectifier Bridge
C) MOSFET/s
D) Wiring is too small in gauge
to name a few of the components.

However IMHO it is also best to check out the Power On switch.
There is a simple test to see whether the problem is a faulty Power On switch, or a faulty Power Supply.

The test involves bypassing the Power On switch. The Power On switch is not involved in this test.
A jumper wire is used on the Soft Power On wire, [ PS-ON ], and a Ground wire in the ATX main power cable connector.

If you bypass, and the Power Supply comes on you have a bad Power On switch.
If the Power Supply does Not come on you have a bad Power Supply.
If you would like to know more in detail on how to perform this simple test, simply post so in a Comment.

The Power Supply used is just a common ATX version.
ATX refers to the Form Factor of the power supply.
Regular size ATX form factor is approximately 6 inches Wide, 5-1/2 inches Long, and 3-1/2 inches Tall. (Height)

There are also differences in the pinout of the ATX main power cable.
Yours may have 20-pins, or 24-pins.
Power Supply's sold now take this into consideration.
Their ATX main power cable can be used as a 20-pin, or a 24-pin version.

[ General example of a 20-pin ATX main power cable, and it's connector,

http://www.playtool.com/pages/psuconnectors/connectors.html#atxmain20

Example of a 24-pin ATX main power cable, and it's connector,

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

Your motherboard may also require an additional power cable, commonly referred to as a P4 power cable, or P4 ATX 12V power cable, or just ATX 12V.
The actual name is 4-pin ATX +12 Volt power cable,

http://www.playtool.com/pages/psuconnectors/connectors.html#atx12v4

If you would like help in finding an inexpensive reliable Power Supply, please post in a Comment.
I will need to know what Model Number of eMachine you have. It's on the back next to the Windows product key, or up on the side of the computer tower.

If you need anything explained that I have stated here, please let me know in a Comment.
Regards,
joecoolvette

Apr 21, 2011 | E-Machines Bestec ATX-300-12E Rev. D 300w...

1 Answer

When i try to play games i get a message saying acceleration is disabled or not supported by my video card driver. my pc is a L&C computer co, windows 7 64 bit operating system withi gb ram standard...


Check the minimum and the maximum specs of your computer, also do check if the game needs some programs that you have to download first, some games need java and some needs flash, this are fatal components that will keep you from playing if you dont have so better yet check the specs carefully and update this post so i can help you.



Thank you.

Apr 04, 2011 | Intel L&C Computer CO.,LTD. 350w UL...

1 Answer

NEED A NEW UNIT OF POWER SUPPLY ATX-400W REV T1


Most computer testing facilities will test your current power supply for free. A replacement is very inexpensive to replace. Bestbuy, MicroCenter, small computer shops and buy replacemnent from Amazon.com, newegg.com.. Just make sure you have the correct information for your replacement. The model number on the power supply would be your best bet in most cases. Good luck and have a great day. I buy power supplies as low as $15 dollars Generic

Jan 25, 2011 | HP ATX-400W, ATX-400W Rev. T1, HP P/N:...

1 Answer

5VSB IS MISSINIG FROM MOTHERBOARD CONECTOR . COMPUTER WILL NOT BOOT WHEN POWER SWITCH ON FRONT PANEL IDEPRESSED . NEED A SCHEMATIC AND COMPONENT DIAGRAM FOR THIS UNIT .


specs are here
http://www.antec.com/specs/SP500_spe.html
This includes 5VSB
There is more info here
http://www.newegg.com/Product/Product.aspx?Item=N82E16817103937
the ATX spec and 20+4 connector pinout (wich locates 5VSB got you) can be found in the Wikipedia article (section 3 in http://en.wikipedia.org/wiki/ATX#ATX_power_supply_revisions has pin out details for ATX rev 2.1).
If your psu is missing 5VSB it is defective and should be returned to manufacturer or retailer if within warranty period. See testing psu articles also.

Jan 19, 2011 | Antec SmartPower SP-500 (ASKU37152)...

1 Answer

Can not get computer to power back up no lights on front o rear just little light on mother board have dell 8400


Bad Power Supply, sscorbett.

Usually you have enough power to light LED lights, (Like the harddrive activity LED light for add-in cards, that you see on the motherboard), and spin fans, but Not enough power to turn the Processor on.

Dell Support >Dimension 8400 > Service Manual

http://support.dell.com/support/edocs/systems/dim8400/SM/index.htm

Technical Overview > System Board Components

http://support.dell.com/support/edocs/systems/dim8400/SM/techov.htm#wp1052739

harddrive activity light for add-in cards (SCSI LED)

The Dimension 8400 comes with an ATX style of Power Supply, that has a maximum rated Wattage of 250 Watts.
1) ALL of the LED lights combined use less than 1 Watt of power.
2) EACH fan uses 2 to 3 Watts
3) A typical Processor can use 51 to 125 Watts.

Your Power Supply just has enough power to light that LED light.
Weak voltage power rail.
Replace the Power Supply.

[ There are three power rails inside that SMPS.
Switched-Mode Power Supply.

1) The 3.3 Volt power rail
2) The 5 Volt power rail
3) The 12 Volt power rail ]

The ATX form factor for a Power Supply refers to the size, and shape of the case, for one.
Approximately 6 inches Wide, 5.5 inches Long, and 3-1/2 inches Tall.
The ATX power supply case in the Dimension 8400 however, is shorter in length.
It is 4 inches Long. (Depth)

Not an advertisement for the website, nor manufacturer.
Reference for the case size, and power cables needed,

http://www.cputopia.com/hp-400w-dell-dimension-8400.html

Scroll down to see the connectors of the various power cables needed.

You may have a Power Supply with these dimensions, and needed power cables, in an unused computer.
Perhaps someone has upgraded to a better computer, and has an unused computer that you can temporarily borrow the Power Supply for a test unit.

Make sure it has at least 250 Watts (Maximum rated wattage), plus,

1) 20-pin ATX main power cable. (Or a 20 + 4-pin ATX main power cable)

http://www.playtool.com/pages/psuconnectors/connectors.html#atxmain20

[ 20 + 4-pin ATX main power cable,

http://www.playtool.com/pages/psuconnectors/connectors.html#atxmain20plus4 ]

2) 4-pin ATX +12 Volt power cable

http://www.playtool.com/pages/psuconnectors/connectors.html#atx12v4

Plus the various power cables needed for the Harddrive, optical drive/s, and computer case fan/s, if it/they do not connect to the motherboard.

Oct 21, 2010 | Dell Dimension 8400 power supply ** FREE...

2 Answers

Does it have a fuse we got hit by lighting and now the Pc wont power up


To fix the problem, you need to disassemble the power supply, replace the burnt out fuse, & also check the bridge rectifier section for burnt out rectifying diodes (these usually get burnt out if the high current gets the chance to leak past the fuse, which could sometimes happen). If you find burnt out rectifying diodes, you will need to replace them as well, as they could burn out the fuse again when you try to use the power supply while they are still there.

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1 Answer

5188-2625 power supply is bad I think. I need some assistance in replacing, and am wondering if should go w mayb a 400w or 550w, seems many ppl have had same issue on this pc


If this is an Atx computer Just unplug it from the external power cord remove the case unplug every thing and remove the screws that hold the power supply in the case. To install just reverse process. If you need more detail let me know.

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1 Answer

Power supply packed i n


Yes, you can safely put in equal or higher. Just make sure it is an ATX and that it is P4 compatible. Most new ones all meet to those specs. Higher is actually better. I would go with a 400w or higher.

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I have a media center cpm 1180n desktop, the green light on back of PS is blinking and when I disconnect the mobo is steady green however when I connect the mobo back to my MB and press the start bottom...


yes it sounds like the power supply is shot, you can get a replacement at any computer shop for around $40. i would put in a 400w or 450w that way if you add another hard drive or opitcal drive it wont be a strain on the new power supply

Nov 30, 2008 | System Power Supplies

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