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Board would not turn on

L have already connected the 24pin power to the power connector and to the 4 pin ATX power but the board power would not switch on even though the powe supply light at the back of the computer is on

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Well, then it could be one of 3 things, it could still be the power supply that's at fault. If you have a PSU tester, check the voltage on each rail and see if it's coming in properly (if you don't have a tester, bring the unit to an authorized service center to have it tested). The second option, would of course be the motherboard may have failed or is defective. Make sure that when you connect the ATX power supply to the board, remove all the RAM, hard drives, optical drives and expansion cards from your PCI, PCI-E, AGP, ISA, or whathaveyou and try with just the board and the power. If it's still a no go, then board or possibly processor may be shot.

Last option, and this one is the sillier of the three, also make sure that you have the jumper pin for the front panel power button connected to its respective spot on the motherboard itself. I know it may sound silly, but I have to say it, as a technical expert, because, well, you never know.

Posted on May 15, 2009

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Where do you hook up the power switch and leds

Posted on Feb 01, 2010

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I changed the power supply and there is a two pin connector with a green and black wires coming from the switch. im not sure were to plug into the motherboard. the motherboard is an msi

Posted on Mar 03, 2010

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Intel fw82801db


on your board theres is a spot where the fan from the cpu goes it saids cpu fan on the board near by cpu socket

Aug 06, 2013 | Asrock Computers & Internet

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I Need the jumper settings for the fic k8mc51g motherboard from a emachines desktop computer. Putting the motherboard in a custom case.


There is a 4-Pin Speaker connector that is not used by Gateway on the motherboard (right beside) the CMOS jumper settings (Pins).
The clear CMOS settings jumper block is right beside the speaker pins. You can use this jumper block to clear the CMOS RAM, which is powered by the onboard real-time clock button cell battery.
Pin 3 is indicated by the markings on the board.
Settings: Pins 1 and 2 covered = Normal Operation Pins 2 and 3 covered = Clear CMOS enabled.crazyeyes746.jpg

Jun 26, 2011 | Computers & Internet

1 Answer

I have got a system with an Aopen motherboard which having only a 20 pin connector for smps connectivity. the Atx smps i have is is 24 pinned. i can connect the main line by splitting up the 24pin...


The actual Processor fan connects to the CPU Fan header on the mainboard. It's 4 small pins. It plugs in right near the CPU socket on the mainboard. Check the user manual for exact placement, you may download it from the AOpen website if you don't have one already.

Plug in the 20Pin connector if that is the most Pins that the mainboard will allow. Cable tie the other 4Pins back onto the 20Pin connector.

Then if there is additional 4Pin connector required by the mainboard for CPU power and you don't have that connector on you power supply, you will need to purchase a Molex to 4Pin CPU power connector. When you go to the computer store check with them that all is correctly connected.

Take care!
damnor01

May 25, 2011 | AOpen MX4GER Motherboard

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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.

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Nov 19, 2010 | Computers & Internet

1 Answer

I have unpluged the 20 pin ATX Power Connector on the PTGD-LA motherboard, there is a 24 pin plug, I am not sure where to plug it in. I can only find manuals for the PTGD1-LA which shows a 24pin/24plug.


If the motherboard has a 24-pin socket, you need a 24-pin connector on your power-supply.
If the motherboard has a 20-pin socket, then only 20-pins from the connector need to be connected to the motherboard.

Oct 22, 2010 | HP Computers & Internet

2 Answers

What power supply to use for an ASUS p40S800-s motherboard with an Intel 848p processor, one HD, separate video board etc.


Any modern ATX form factor power supply should do the trick. If you are buying new, ask the vendor. If buying used, make sure the power supply has at least 350+ watts and has the 24pin ATX connector that directly powers the motherboard.

Dec 29, 2009 | ASUS P4S8X Motherboard

1 Answer

No boot up.


Power supply is easier to troubleshoot my local pc shop has used ones for $5 or if you have one laying around make sure you have one with the proper mobo connector 24pin will sometimes fit 20 pin as long as there are no transistors to close to plug just turn pc off unplug all drives and mobo plug in good supply and turn on if it works thats the problem if not probably mobo

Apr 10, 2009 | Shuttle SK43G (tsk43g) Barebone

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Not sure about upgrading power supply


In many cases the additional 4 pin section slides up and off of the main power plug for use in your particular unit.

Feb 20, 2009 | HP COMPAQ Presario SR5410F Pentium...

1 Answer

I change the power supply but i have a little problem. The new one on the ATX power connector have only 19 pin then 20 old one plus extra 4 pin for something else. The new power supply in Rosewill...


The extra 4 pins on the power supply's atx connector is for new motherboards that require 24pin power supplies. If your motherboard has a 20pin port, then only connect the 20pin portion of your power supply connector.

If your power supply has a 24pin fixed connector that can't be split into a 20+4pin configuration, and your motherboard doesn't have space to let the extra 4pins on the side, then you might want to consider returning the power supply and change it for one that can be used as a 20 or 24pin. Otherwise you will need to cut the extra 4pins apart.

Jan 05, 2009 | ASUS P4B533 Motherboard

1 Answer

Biostar 770 A+ motherboard problem.


Hello!

Sounds like your motherboard isn't getting power...
26d7cc5.jpg
I suggest you check that you have both the 24pin ATX connector (upper center) and the 4 pin P4 (upper right) connected. If your PSU does not have a 24pin but only 20pin connector I suggest you find a proper PSU and test with that.
It's very unlikely for a new motherboard and/or CPU to be not functioning.

Hope this helps! 

Sep 28, 2008 | Biostar M7VKG Motherboard

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