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New build not powering up, motherboard LED on.

Hi folks,

I've built a few computers before but I am still extremely green. I ordered all the parts in from Amazon and they arrived earlier tonight, so I set to work. I have everything plugged in, I've triple checked seating and made sure SATA cables and such are all in firmly but the damn thing still isn't powering up.

At first I thought it was something to do with the connector to the motherboard for the power button, which was indeed wired incorrectly (I've always had "sleeve" type things before, so this was normally a cake walk) but even after I fixed that there was still no joy to be had.

As it currently stands, the only thing that happens when I turn the PSU on at the back of the machine is the green light on the motherboard lighting up, which is fine. However, when I hit the power button at the front of the computer, I get nothing -- not even the sound of the hard drive kicking in or any movement from the fans; PSU, CPU or Case.

I'm really lost right now and don't have a clue where to turn. I'm confident enough to believe it's probably a piece of hardware that was DOA but not arrogant enough to disregard the possibility of me making a mistake. I have run through the checklist here that is stickied and had no luck.

If anyone has any suggestions, I'd gladly accept them and if it does sound like a hardware failure, how do I determine which part needs to be sent it back?

Specs:

Motherboard: M5A78L-M
PSU: EVGA 500B
CPU: AMD FX6300 Black Edition
GPU: Sapphire Dual-X R9 270X
RAM: GSkill Ripjaws X 1x 4GB
HDD: Western Digital 750gb Black

No optical devices at all; i planned to install windows via usb. It might be worth noting that there were only 6 standoffs for the case, yet my motherboard has "holes" for 8. Could this be an issue?

Thanks in advance.
13 answers Last reply Best Answer
More about build powering motherboard led
  1. so the 24 pin power connector must be in. is the r9 270 connected to your monitor. probably a DOA
  2. I haven't hooked it upto a monitor at all yet. I figured that if the fans and harddrive weren't kicking in then it wasn't going to do anything? If I'm wrong, I'll run downstairs right now and give it a go.

    Thanks for the swift response.
  3. pixolinko said:
    I haven't hooked it upto a monitor at all yet. I figured that if the fans and harddrive weren't kicking in then it wasn't going to do anything? If I'm wrong, I'll run downstairs right now and give it a go.

    Thanks for the swift response.


    hey man im a speed demon let me think of any other possible ideas. also you should go into the bios so yeah try hooking up your monitor. what mobo you have
  4. It's an ASUS M5A78L-M. I'll take it down now and see if it fires up at all.

    Thanks again.

    Edit: It's my understanding that the LED on the MOBO signify's the point in the boot process it's on. It's only ever been a solid and consistent green, if that helps.
  5. pixolinko said:
    It's an ASUS M5A78L-M. I'll take it down now and see if it fires up at all.

    Thanks again.

    Edit: It's my understanding that the LED on the MOBO signify's the point in the boot process it's on. It's only ever been a solid and consistent green, if that helps.


    is the mobo making any beeps. you can check in the manual for the lights meaning.
  6. I read the manual from cover to cover and it only said it signified that it was "on", in standby mode. I was just wondering if there was something else they neglected to mention.

    I just tried it with a monitor and it's still not powering, so cant access the bios.

    edit: No beeps either but theres no speaker hooked up at the moment, to my knowledge.
  7. Best answer
    pixolinko said:
    I read the manual from cover to cover and it only said it signified that it was "on", in standby mode. I was just wondering if there was something else they neglected to mention.

    I just tried it with a monitor and it's still not powering, so cant access the bios.

    edit: No beeps either but theres no speaker hooked up at the moment, to my knowledge.


    ok i think you should rma it should make some beeps to represent its working sorry about this but you could try testing each component individaully and see if something is not working
  8. I'll have a buddy bring over his psu tomrrow so i can rule that out, since i've already tried to run it bare bones. If that doesn't fire either, the Mobo will be returned on Monday. Really annoying.
  9. sorry your having all these problems just causes a lto of unnecesary problems.

    select best answer when your done
  10. Yeah, it's not good at all. Thanks for your help.
  11. pixolinko said:
    Yeah, it's not good at all. Thanks for your help.


    your welcome pm any more questions
  12. Just thought I would post here to update what the cause was, as it might help someone else diagnose an issue in the future. The motherboard was fine in the end, it was actually a faulty GPU. The PSU caught the issue and just didn't send any juice, so there were no signs of life other than the mobo's LED which was just signifying that there was a current.

    That's the breakdown I got from the chaps in the PC store I took it into. Did a complete healthcheck for £15!

    Anyway, thanks again for your time and help bud. The mobo was also their first guess, so your line of thinking was on track! Hopefully this can help someone else in the future.
  13. pixolinko said:
    Just thought I would post here to update what the cause was, as it might help someone else diagnose an issue in the future. The motherboard was fine in the end, it was actually a faulty GPU. The PSU caught the issue and just didn't send any juice, so there were no signs of life other than the mobo's LED which was just signifying that there was a current.

    That's the breakdown I got from the chaps in the PC store I took it into. Did a complete healthcheck for £15!

    Anyway, thanks again for your time and help bud. The mobo was also their first guess, so your line of thinking was on track! Hopefully this can help someone else in the future.


    yeah thanks for posting this should help others(including me) in the future if any problems arise. i just have some quesitons why did you buy a 750gb hdd and 4gb of ram(i know 4gb is cheaper but a 500gb cost like 54$ and a 1tb cost like 49$ ??)
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