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Discussion Starter #1
Hello,

My computer will not even turn on! The fans won't spin or nothing at all. I've tried new RAM, replacing the graphics card, clearing the BIOS by shorting the pins. Whenever I flip the power switch on the PSU, the LEDs turn on briefly. Any idea what is going on?
 

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Hello,

My computer will not even turn on! The fans won't spin or nothing at all. I've tried new RAM, replacing the graphics card, clearing the BIOS by shorting the pins. Whenever I flip the power switch on the PSU, the LEDs turn on briefly. Any idea what is going on?

...unfortunately, there is a huge range of issues that might be causing that, including a dead PSU, CPU or mobo (but doesn't have to be). One weird one I once ran into was very similar to what you describe - a brief flicker of LEDs than nothing. After a lot of troubleshooting, it turned out to be the SSD Sata connection which had twisted and was causing a short. But that's pretty rare as a cause for what you describe.

...in any event, looking at your post and what you already tried, do you have another PSU you can try out in your setup ?
 

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I have another PSU, but my current PSU is very high quality (Corsair AX850 made by Seasonic from years back). Still, I'll give it a try. Thanks for your help btw.
 

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I tried out another PSU and no luck. The RGB lights still flash as before, but it still doesn't turn on...
 

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...another one down, xyz to go. Do you have another CPU known to be ok and that would work with that board / chipset (or can you borrow one) ?
 

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...another one down, xyz to go. Do you have another CPU known to be ok and that would work with that board / chipset (or can you borrow one) ?
I wish I could say yes, but I don't. The CPU and Motherboard are less than a week old.
 

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If the mother board has a speaker connection out it get one made for a motherboard. It may be giving beep codes.

Start disconnecting USB one at a time, HDDS one at a time, the SSDs add on cards one at a time, RAM one a time.

It should still give a beep code if the if all there is is cpu and mother board.

I generally buy only Motherboards that have 8 segment post code LEDs

I did buy a B350 that does not have one and they usually don't come with tiny speaker

Check your volts on the Motherboard connects first. 12 volts should be between 11.85 and 12.15. 5 volts 4.90 to 5.10 and 3 volts should be + or - 0.1 volts. A 4 digit meter is better for that.

Generally I start trouble shooting with a PC beep speaker.

Example of a beep speaker:

https://www.newegg.com/p/2ZR-0036-00041?Description=motherboard beep speakers&cm_re=motherboard_beep speakers-_-9SIA4SR6UT7658-_-Product
 

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Is your case hooked up to the right header on the mobo for power?
 
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Sorry, didn't read that the RGB stops after a second of the PSU being flipped on.
 

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Discussion Starter #11
I have somewhat fixed the problem. For me I unplugged the 24 pin connector and plugged it back in. I also reseated the power button plug. IDK which fixed it, but one of them did. I can now boot into Windows.

However, I now noticed that I can only boot with one stick of RAM. Both sticks work; the right slot seems to not work. I should mentioned the motherboard is an Asus ROG Strix B450-I Gaming. RAM is Corsair Vengeance 2x8GB (CMK16GX4M2A2400C16) and the BIOS is updated to the newest version.
 

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Have you pulled your CPU and reseated it yet? Could be a bent pin in the socket or on the CPU not making a proper connection. I had a bent pin on my motherboard which caused 2 of the 4 DIMM slots not to work.
 

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So I took out the CPU and noticed no bent pins. However, I noticed a tiny bit of thermal paste on one of the pins. But I still see gold, so it's not covering the pin. I think it's because the stock cooler comes with SO much thermal paste. Probably too much.
 

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So I took out the CPU and noticed no bent pins. However, I noticed a tiny bit of thermal paste on one of the pins. But I still see gold, so it's not covering the pin. I think it's because the stock cooler comes with SO much thermal paste. Probably too much.

...glad to see that you've made substantial progress ! FYI, I recently fixed an old X99 mobo w/ various bent pins and brought it back from one to four memory channels (more >here). If you do decide to follow any of those tips, you do so at your own risk, and hopefully with abundant caution !

With that out of the way, it may be the case that a pin is not visibly bent, just ever so slightly lower than the others, and not making good contact - worth looking at it with a magnifying glass. I have had brand new mobos (LGA 2011) where I had to re-seat the CPU and also the cooler several times before all memory channels worked properly. Also, I would make sure that no thermal paste is on any pins (or the bottom of the CPU) even if you can see the gold / pads. But again, compared to yesterday, you're a lot further down the road already !
 
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