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Help me get booted please

Help me get my PC to turn on please 

I built a PC using the msi mpg B550 gaming plus motherboard. The box says the bios has been updated for ryzen 5000 series CPU’s. But I installed a ryzen 3700X. PC will not boot for more than three seconds. Motherboard displays white CPU debug LED. 

I did the basic troubleshooting, checked ram, checked all the cables even swapped in a ryzen 3500 just to see if the other processor was bad and still nothing.

Do I need to roll back the bios? 

Motherboard is an MSI mag b550 gaming plus
GPU an RTX 3060 12gb single fan Phoenix I think. 
PSU is a cooler master 850 V2 80+ gold
Ram is G.skill 2x 16gb 3200

 

Edit:

At this Point I have tried

- flashing latest bios

- unplugging everything and plugging it back in 

- different ram 

- re installing gpu, cpu, ram

 

Only progress I've made so far is that if there no ram in the system it does stay on and the debug LED switches to the DRAM.

Edited by Rakeboy77
Problem solved
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Just now, Rakeboy77 said:

Ram is G.skill 2x 16gb 3200

Do you have any other ram you can try? The CPU and motherboard might not like this particular kit

I WILL find your ITX build thread, and I WILL recommend the SIlverstone Sugo SG13B

 

Primary PC:

i7 8086k - EVGA Z370 Classified K - G.Skill Trident Z RGB - WD SN750 - Jedi Order Titan Xp - Hyper 212 Black (with RGB Riing flair) - EVGA G3 650W - dual booting Windows 10 and Linux - Black and green theme, Razer brainwashed me.

Draws 400 watts under max load, for reference.

 

How many watts do I needATX 3.0 & PCIe 5.0 spec, PSU misconceptions, protections explainedgroup reg is bad

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Just now, Fasauceome said:

Do you have any other ram you can try? The CPU and motherboard might not like this particular kit

I have a cheap hp green stick 8g. I’ll try that. 

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1 hour ago, Rakeboy77 said:

I have a cheap hp green stick 8g. I’ll try that. 

No dice

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1 hour ago, Fasauceome said:

Do you have any other ram you can try? The CPU and motherboard might not like this particular kit

No luck 

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18 minutes ago, Rakeboy77 said:

No luck 

the motherboard itself may be at fault then

I WILL find your ITX build thread, and I WILL recommend the SIlverstone Sugo SG13B

 

Primary PC:

i7 8086k - EVGA Z370 Classified K - G.Skill Trident Z RGB - WD SN750 - Jedi Order Titan Xp - Hyper 212 Black (with RGB Riing flair) - EVGA G3 650W - dual booting Windows 10 and Linux - Black and green theme, Razer brainwashed me.

Draws 400 watts under max load, for reference.

 

How many watts do I needATX 3.0 & PCIe 5.0 spec, PSU misconceptions, protections explainedgroup reg is bad

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New or used board?  CPU pins not bent/broken and CPU worked before?  At this point, it would not hurt to try to flash an older bios specified to work with the 3700x using bios flashback.

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Used board... I just tried the latest bios and nothing. 

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47 minutes ago, REHED said:

New or used board?  CPU pins not bent/broken and CPU worked before?  At this point, it would not hurt to try to flash an older bios specified to work with the 3700x using bios flashback.

Bios flashback gave me no new results 

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It appears the motherboard is defective based on your troubleshooting.

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Solved: it ended up being a bad power supply. 
 

I swapped it out for a sonic focus 850 and it fixed it

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