Newly Built PC Won't Boot - Front panel lights, no fans, no beeping and no monitor input

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BozoBomber

Commendable
Mar 22, 2016
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1,510
Hello,

I have recently built my own gaming PC and first off it booted fine and everything worked but the graphics card which could not be recognised in the bios, and due to not being recognised wouldn't let me install the drivers, because of this I figured it was either a fault of the motherboard or the graphics card, because I did not have any method of testing the components I returned both. It wasn't an issue with the GPU because when the new one came nothing changed once installed, but now I have returned the motherboard and installed a new one the PC does not boot?!

I have made sure I have plugged in everything properly and correctly and checked that it wasn't the ram by installing idividualy (and that it worked before). The PC "on" light shows but apart from that I have nothing, I brought a bios speaker and that didn't beep and none of the fans spin, no connection to a monitor?!

Thanks for reading, please give me all the suggestions you have, what have I done wrong? What component is broken?

Thank you for your help!

- Will

Update -

CPU - Intel i5 6600
GPU - Giabyte Windforce 3x GTX 970
Ram - 16gb DDR4
Motherboard - H110M-H
PSU - Corsair CX500M
CPU Cooler - Cooler Master Hyper 212x
Case - Corsair 200r
Case Fans - Include Corsair 200r fans (x2)
 
Solution
Rogue Leader
Bozobomer
Lots of speculation going on here lets get to a starting point first. Take everything out except the motherboard and CPU and 1 stick of ram and the PSU, plug your monitor into the motherboard and see if it boots. If it doesn't, remove the board from the case and try the same deal on a workbench. Make VERY sure all connections are tight and the ram is seated completely

If it STILL doesn't give you the BIOS (try the other RAM first too), then maybe the new motherboard you got is bad. If it does then reinstall the motherboard, being very careful that all standoffs are screwed into and nothing is shorting the board. Then work from there until you add your new GPU, and then make sure you plug the monitor into the GPU instead...
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Despite weather or not the PSU is "really poor" which I interpret as bad quality, the PSU provides enough power and the right sockets for the built (verified as well by PcPartPicker) so I cannot see why replacing the PSU could make the system boot, especially since it has previously? I may be wrong though, can you please elaborate on this.

Thanks for your help

- Will
 
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Lot's of PSUs can provide the appropriate power....in theory.

In practice though, poor quality PSUs have a limited lifespan at best, and many are incapable of powering the unit properly. \

Trust me, I had a CX750 for a rig that required ~450W and it still wouldn't power it properly.

Replace the CX PSU.
 
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You do understand this is a new PC and that it booted before with the PSU? Are you saying that the PSU is at fault? Why? Thank you for your help

 
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I do understand that, and I'm telling you the chances of that PSU being faulty are high.

I had one, in a new build. POSTed once, and then on random occasions after that. Replaced it & the issue was gone.

The problem is when you see fans & LEDs powered, you tend to not think of the PSU as somethings are getting power.
Considering the difference though, fans & motherboard LEDs require minimal wattage, opposed to your the wattage of the CPU or GPU - there's enough consistent output for the fans/LEDs but not for anything substantial.

 
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Yeah if you are seeing something on your screen and the graphics card is not recognized you must be plugging into the back of the motherboard and not the gpu. I dont think a gpu that the computer does not even know is there would display anything on your screen.
 
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Turkey & Dunlop raise good points.

If you are indeed attaching to your motherboard & not the GPU, then fix that element.

If you still have no luck, remove the GPU & attach to the motherboard - see if you get any display there.

If you do, then add back the GPU and see if you can use that for display.

<<mod edit for clarity; removing the GPU (not the CPU) is what was meant) >>
 
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The CX500 reviews well when new; its issue is that it does not last, not that it is bad when installed. I don't think it's the problem here.
Make sure all power cables are securely in place, and latches (e.g. on the ATX and CPU power plugs) have snapped into place, meaning those cables are fully seated.
 
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Did I really write CPU? Wow, thanks for catching that Onus!

The CX500 doesn't last, that's true, but there's numerous cases of DOA PSUs. I've had one, and I know at least 2 others personally who have too, along with quite a few online. I may well have jumped the gun latching onto the PSU, so I hope it's something else, an quick fix.

Hopefully it is just cables not seated correctly or attached to the motherboard opposed to the GPU.
 
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Bozobomer
Lots of speculation going on here lets get to a starting point first. Take everything out except the motherboard and CPU and 1 stick of ram and the PSU, plug your monitor into the motherboard and see if it boots. If it doesn't, remove the board from the case and try the same deal on a workbench. Make VERY sure all connections are tight and the ram is seated completely

If it STILL doesn't give you the BIOS (try the other RAM first too), then maybe the new motherboard you got is bad. If it does then reinstall the motherboard, being very careful that all standoffs are screwed into and nothing is shorting the board. Then work from there until you add your new GPU, and then make sure you plug the monitor into the GPU instead of the motherboard.
 
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Solution
Any PSU can be DOA though; Corsair is likely no worse than average, and since it worked, in this case it seems even less likely.
Rogue Leader has provided good steps though. The only clear reason to skip any of them might be if you discover something obvious, like you forgot to mount the motherboard on standoffs, or a power cable isn't properly seated.
 
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