Question about ASUS A8N-LA GeForce 6150 LE Socket 939 mATX Motheboard w/Video/Sound/LAN Motherboard

1 Answer

Asus A8N-LA will not power on

I bought this mobo to replace my old one. I have plugged in both power cords, (the 20 and the 4 pin) I have hooked up the power switch, reset, power led, hdd led, and the motherboard still gets no power when plugged in and the switch is turned on. Am I missing something or is my new mobo or PSU dead?

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  • 7 more comments 
  • daytonhouse Apr 23, 2010

    Ok. PSU turns on! A good sign. Now what?

  • daytonhouse Apr 23, 2010

    I'm not even sure if I replied to you the first time, But PSU works. now what?

  • daytonhouse Apr 23, 2010

    connecting the pins does nothing and I tried turning the plugs around in case I had the positive and negative mixed up. still no luck.

  • daytonhouse Apr 23, 2010

    The thing is, this pc worked fine except I was having to clear the CMOS to get it to boot. every time. Then that stopped working and after some reading I decided to replace my mobo. The power switch worked fine before this, so I doubt it is the switch.

  • daytonhouse Apr 23, 2010

    Asus A8N-LA

  • daytonhouse Apr 23, 2010

    There is no place for the plug from my case marked SPEAKER and there is no place to plug in the power fan plug from my PSU. These shouldn't matter though, right?

  • daytonhouse Apr 23, 2010

    Thank you man. I really appreciate this. I built myself a new computer and I've been trying to get my old one to work for my fiancee and it's getting very frustrating.

  • daytonhouse Apr 23, 2010

    OK, did exactly as you said and it didn't work. had the mobo on the desk with minimal things hooked up. just ram, cpu & heatsink/fan, power plugged in, bridged the 2 pins, nothing. I don't have another powersupply so I tried this test with my old motherboard and it powered up sitting on the desk no problem. I think I was sent a faulty refurbished motherboard. Thank you for your help.

  • daytonhouse Apr 23, 2010

    OK. I was wrong, tried it again, but I tried a different set of pins for the power switch and it worked! The pin layout is a little different from my old mobo. A user manual would have helped. Thank you so much for all you help!

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  • ASUS Master
  • 13,433 Answers

Hello and welcome to FixYa.
Lets do a test, remove all the cables that come from the powersupply to go to the mainboard.

Now you should have a 20 or 24 pin connector find that.
Asus A8N-LA will not power on - 834d8d4.gif



To test the power supply that it works. Take a paper clip or similar, Connect pin 14 to pin 13 or 15 or 16 or 17. Any black connector, works as a ground.

Connecting the green pin 14 to a black ground. will turn on the power supply, the fan in the power supply should start spinning.

If it does not, check that you connected the right pins, also make sure that you used something metallic or a wire.

if it is still not turning on, test the psu on another motherboard or a powersupply tester (they cost something like 10 to 30 $)

now if the psu doesn't turn on, at all, then it is the issue. These can be repaired but hardly anyone does it, unless you are in warranty.

Let me know once you have got this far and if you still need help.

Posted on Apr 23, 2010

  • 5 more comments 
  • Ekse Apr 23, 2010

    Okay so the psu is fine, reconnect all the connectors, make sure you do connect everything and everything is the right way.




    The 4pin cpu power goes near the cpu, then the 20 or 24pin cable to its connector, note that the 20 to 24 pins (4pin connector, same wires as the 20pin) is separate from the connector and if you hook this one up to the cpu power it will not work.




    So make sure things go where they are supposed to go, they go in quite easily if they are on the right spots.




    then double check that you connected the power switch to the right connectors, if you are unsure, disconnect all those front panel cables, take a flat head screw driver and try connecting the power switch connectors together without the switch.


    once you find the two metal connectors from the front panel header that turn on the machine, take note of it and make sure you connect the front panel switch to it, if it doesn't turn on with the switch, then the switch is most likely broken.




    Let me know again once you have got this far and if you need the pin out of the connectors or anything else.

  • Ekse Apr 23, 2010

    Yeah I got the message. all you need to do is press F5 on this page to refresh it to get my comments. or be on the lookout on your email, you do get a notification when I respond. it does take a few minutes for me to get notified about your comment and then to respond to it, and then for you toget the message about it.

  • Ekse Apr 23, 2010

    tell me the brand and model of the motherboard and I'll take a look at our options or what we might be doing wrong.

  • Ekse Apr 23, 2010

    the speaker doesn't matter, the cpu fan would be a good idea to connect maybe you are connecting it to something else but it would be a good idea to connect to the connector as some motherboard will complain about it, but of course you can set that to ignore in the bios




    so basically, those two shouldn't matter at all, I'll get back to you in a few when I get a look at the motherboard.

  • Ekse Apr 23, 2010

    Okay so there is the CPU power cable top left corner almost, next to cpu, 4pin, that should be connected to a connector with Yellow / Black wires.




    Then the bigger power connector near the memory slots.




    That is it, it should power on now, if it does not, take the motherboard out of the case and put it on a desk. take the powersupply out as well or find another one.




    connect the cables, the two. use a screw driver to connect the powerswitch connectors together to get it to power on - at the bottom right corner of the board.




    White small text on the board near the area points out which connectors are the power switch.




    If it still doesn't turn on. lets disconnect everything extra.




    Just have the cpu, powersupply, memory, motherboard and optionally video card connector to the board. if its still dead and your completely sure that your connecting the right pins at the bottom right corner, Then try another psu.




    If it is still dead, disconnect the video card and memory, find a fan that goes to the cpu fan connector at top right, near the cpu. so we can roll that out of the question.




    If its still completely silent, remove the cpu as well. try once more. If its still dead, the motherboard could be faulty.

  • Ekse Apr 23, 2010

    I said it could be faulty, It definitely is faulty by then if you have tried two power supplies on it. the board should power up even without any components installed so the cpu fan should spin. if it does not, the board seems dead.

  • Ekse Apr 23, 2010

    The thing is this motherboard is used by HP couldn't find a manual for it, asus didn't have any info about it.




    Nice to hear that you got the machine running!

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