Just built a new PC and it won't boot.

Trying to update BIOS and I get the "solid green lights".

The only instruction I can find is "Please make sure that you plug the USB drive to the USB BIOS Flashback port".

But what should I do to not kill my MB?

Extract the USB drive? Turn the PSU power off? Press the bios button again?

I just got the motherboard and I only have the 24 pin cable from the power supply connected. It has been stuck in a flashing green light for the last 45 minutes.

What's going on? How do I safely abort this process safely!?

I'm now finding out that my USB drive might be too big since it's 16 GB instead of 8 GB or below.

Hi all, wondering if I could get some technical support advice, I've just put together a pc and it's not posting no matter what I've tried by reading every other post I can find.

System: MB: B650m Pro RS BIOS: 1.28 PSU: Corsair RM750x CPU: Ryzen 5 7600 GPU: Sapphire Pulse rx7800 xt Drive: Crucial P5 2TB RAM: Corsair Vengeance 2×16GB 6000mhz cl36

So here are the troubleshooting steps I've tried so far -reseating all cables from PSU -trying to boot without GPU -reseating everything (RAM, CPU, cables again) -Clear CMOS -left trying to boot for 40 minutes as I've seen it can take some time -tried with one stick in each slot -Tried with the other stick in each slot -tried with a different set of ram

And I've tried the BIOS flashback with a 4gb usb drive formatted fat32 16kb partitions using both Windows and Rufus, using MBR partitioning, I've been renaming the file to creative.rom, and I've tried with 3 usb drives of varying ages and capacities, I'm using the correct slot, I've check that in the manual a dozen times, and I've tried with everything removed from the motherboard but the motherboard power, but every time after holding down the button for 3-5 seconds the light just stays solid green.

So at this point I'm pretty much out of ideas, and I'd welcome any other suggestions.

Update: this is one of 2 AM5 builds I was going to do this weekend, so I've built the other one, and it boots up fine, and I've swapped in the CPU and RAM from the system that won't post, and the CPU and RAM work fine, so it's definitely a motherboard issue, think I'm going to have to return it at this rate.

Update 2: Thanks everyone for your suggestions, I've ended up RMA'ing the board and they've decided it's faulty too, so just waiting on them to send the replacement out now.

A couple of days ago my PC got the issue of not booting. It didn’t matter if the PC was turned off, or in sleep mode. It always got stuck with the green solid light. In the beginning it would boot after a couple of restarts - green light disappeared, but a solid white light has been shown on the mainboard. Today my PC didn’t boot at all. Just the solid green light, Screen stays off, nothing happens. Except after one of the restarts, green light was replaced by the white light and you can see on the attached picture what was shown on my screen. That’s it! I guess my PC is, or for that matter, my Mainboard and CPU are dead. Or do you have any suggestions what can be done for troubleshooting? I already looked up the issue here on Reddit and on google, but nothing helped so far. I also don’t have another PC where I could test my parts if they’re working.

Idk how Asrock can still sell mainboards after this whole fiasco. Besides that I’m also an idiot for trusting Asrock, but that won’t happen ever again.