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New build, Not booting


Just finished putting together my newest build. It is showing no signs of life at all. I will list the components below. I have verified a working outlet, working cables. Made sure power cord is seated into the PSU, Reseated the video card unplugged and replugged the CPU power and Mboard power, tried jumping the board in case the switch is bad. Thought I would throw this out here before I start yanking components. All my other systems are intel so I will not be able to replace the CPU or Mboard with a known good model. I have also pulled everything but the CPU and cooler and disconnected everything but the 8 and 24 pins and have the same result.

Ryzen 2600
MSI B450m Gaming plus
2 x 8 gb Corsair Vengeance LPX DDR 3000 Ram
Asrock Phantom D RX580 8gb
Coolermaster masterwatt 650 PSU
Adata SU 655 SSD

Hopefully this is just a stupid error on my part but having looked this over for the last 30 minutes that is becoming more remote of a possibility. If I cannot figure this out tonight I will start swapping known good GPU, Ram and PSU tomorrow.

Thank you

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Clarification Request
You wrote "power cord".

In reply to: New build, Not booting

All the PCs I see today have TWO power cords from the PSU to the motherboard. Later you mention the 8 and 24 pin (cords?) so maybe that's fine.

What I don't read is a cardboard build. No case, just the PSU, motherboard on cardboard for a power up test. I don't need more than that to get a power up.

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In reply to: You wrote "power cord".

Correct, currently everything is outside of the case. Only things going to the board now are the 8 and 24 pin from the PSU, only other components are CPU and the cooler

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That means those are the suspect parts.

In reply to: Clarification

Those are now the suspect parts. I can remove the CPU and cooler to see if I can get the board to power up.

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In reply to: That means those are the suspect parts.

Understood, going to try to jumper the PSU and see if I can get anything out of it , if not, going to replace the PSU with a known good. If that doesn't work then on to the CPU

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What is "jumper the PSU"?

In reply to: Reply

The green wire test can smoke a motherboard.

When I do my cardboard build I can start very small. I use the power on jumper on the motherboard. Remember there are many YouTubes on this so I'll stop here.

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Got the PSU to spin a fan

In reply to: Reply

jumpered the 24 pin with a fan hooked up and got that to spin up

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Let's get back to the motherboard for a moment.

In reply to: Got the PSU to spin a fan

When it doesn't power up I check my board that the CMOS clear jumper is on/off or "in the right position" and the CMOS battery reads (for a CR2032) just over 3 Volts. Some boards have other jumpers so I give them a going over.

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In reply to: Let's get back to the motherboard for a moment.

Took a bit to find it in the manual but according to the documentation the CMOS clear jumper is in the normal setting, now to pull a good PSU and hook it up

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Swapped PSU

In reply to: CMOS

Ok, Replaced PSU with a known good unit. Did not change, board appears totally unresponsive. I plugged the new PSU into a known good system and it powered on

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