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Question

DIY Computer Not Working

Oct 10, 2018 7:02AM PDT

My son and I built a PC last night and it is not working. When powered on, the fans go on but the monitor says there is no signal. We tried plugging it in HDMI and the other way (sorry, forgot). Anyway, I opened it up, made sure everything was plugged in right and tried it a few more times. There are a couple of power cords from the supply that aren't plugged in but I assume they are for other devices we didnt buy. There is one 8 pin that says CPU on it but there is no place on the motherboard that I could find plus we used the bigger power cord that has 20 or more pins to plug into the MB. I know its hard to trouble shoot something without seeing it but where would you start to look for a problem. How would I even know if its the MB or the CPU or a power issue. I am assuming that once I turn it on I should see something that lets me then change the boot up to my windows USB install. I even tried leaving the windows USB in when I turned it on and that didn't help.

Post was last edited on October 10, 2018 7:40 AM PDT

Discussion is locked

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Clarification Request
What kind of GPU
Oct 10, 2018 7:30AM PDT

do you have ?

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My specs
Oct 10, 2018 7:35AM PDT

Its a B450M-HDV mother board, AMD processor and a Geforce GTX 1050 ti graphics card. Now its not even powering on the fans.

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Answer
Re: no signal
Oct 10, 2018 7:33AM PDT

If all is fine with the hardware the BIOS should tell you there is no boot device, if you didn't press the right key (could be delete or escape or some function key, find it in your motherboard manual) soon enough. If you pressed correctly, you would get into the BIOS setup to change the boot device to USB (assuming it contains a bootable stick - did you check it's bootable in another PC)?

So I assume you connected something wrong.

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no signal
Oct 10, 2018 7:38AM PDT

I didn't try it in another PC. I didn't get any signal so I didn't see any BIOS setup. I can't find where to plug in the six pin CPU connector. Now, it's not even powering the fans when I turn it on.

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Cpu power
Oct 10, 2018 10:47AM PDT

That cable that says cpu plugs into the mobo in a 4 pin socket that is close to the dvi port.

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cpu power
Oct 10, 2018 12:23PM PDT

I tried before work but the cable is 8 pins and didn't snap in half like some people said it would. I will have to try again tonight and see what I can do.

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Answer
DIY Computer Not Working
Oct 17, 2018 4:02AM PDT

The 8 pin connector should split in to two four pin connectors and one of those fits in to the motherboard in a big black four pin socket above and to the right of the CPU. Without that your PC definitely will not work at all.
Don't worry if it won't split apart you can buy cheap adapters from heebay.

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Answer
Sorry, I meant LEFT not RIGHT
Oct 17, 2018 4:02AM PDT

I really should read my answers before I hit "post" lol.