New B450M-HDV MB won't post.

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Dec 15, 2018
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Hi all,
Newbie here hoping you can help. I've attempted to build a pc.
Asrock B450M-HDV atx amv Motherboard
Ryzen 3 2200 3.5 processor
1 x 16gb Corsair vengeance ddr4 ram
Cooler master master box e300l

It won't post. Both the fan for the cpu and the fan for Tower spin when I press the power button. Oh and the power button works but won't power off the pc no matter how long you hold it.

I've taken the battery out and reset the bios. I've attempted to power up the Motherboard out of the chassis on an anti static bag to ensure it wasn't shorting, still no joy.

I've removed the memory, and all connections other than the power button and heat sync fan.

I've tried with and without heat sync, I've tried hdmi and vga (there is no additional graphics card to use).

Nothing appears on screen, no motherboard lights anywhere, no noises.

This is my second motherboard in a week (as the previous one behaved in exactly the same way and I believed at the time it was faulty).

All components are new. I have followed various threads here and ran through several checks hence the previous steps.

All I can say is the cpu gets hot (if the heat sync isn't attached) and the fans spin.... That's it.

So at this point I'm thinking it may be a faulty ryzen cpu or maybe a bios issue but I believe this Motherboard should be fine... But I dunno.

Any help, greatly appreciated.
 
Dec 15, 2018
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Corsair - Vengeance LPX 16 GB (1 x 16 GB) DDR4-3000 Memory. I tried with it in both available slots and without being installed at all. Sadly, I don't have an alternative to try.
 
Dec 15, 2018
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There are speaker pins on the board but, I think, there is no case speaker with this case, there is a HD audio cable from the case which I think is the headphone and mic jack. But other than that I can't see a speaker or a cable for one.
 
Dec 15, 2018
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Admittedly no, not at first. I had only the 24 pin atx connected. Then I read in another thread to check the 4 pin power cable was connected for the CPU. So its been attached ever since but it didn't make any difference.
 
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