I flashed the bios with just the power supply and nothing else first and it seemed to go fine - blinked for a while and then stopped. I then put the rest of my build together and after turning on the power supply the BIOS flashback led won't stop blinking. I plugged the USB back in and pressed the button again and it blinked quickly and cycles between blinking quickly and slowly. The system will not post.
Parts:
Mobo: ASUS b550 TUF gaming
CPU: Ryzen 9 5900x
GPU: 3080 Strix
PSU: Corsair RM 850x
Memory: crucial ballistix 3200 mhz 32 gb
CPU cooler: Be quiet dark rock 4
SSD: SK Hynix m.2
Videos
What should I do? USB is 2.0 and 4gb.
Last night I turned off my PC as usual, nothing strange happened, this morning I went to turn on the PC and it didn't start, not even the RGB, not anything. Then I noticed a green light blinking on the back, it was the bios flbk, I didn't know what it was until now that I researched it. Tried everything to fix it, removed de CMOS, used a screwdriver to turn it on, checked the button itself, I tried to update the bios with a flashdrive, unplugged all the cables from the back, move it to my table and I connected the USB on the bios port, and I let it run for several minutes, but after 30 minutes I thought my MB was dead, so I just let it there to do some other things, came back 2 hours later, pressed the power button, and it booted, I got excited, turn off the pc again, put it back at my desk, plugged everything back, and now it doesn't start again, I don't know whats wrong, its been another 30 minutes, and it's still blinking, am I doing something wrong? And how did this happen if I never have messed with the bios or this button?
Its an Asus prime x670-P WIFI
It’s been 2 hours since I started the BIOS flashback. It’s just been blinking this whole time. No feedback on the monitors; no indication of failure or success. I think I may have formatted my thumb drive incorrectly, but shouldn’t that give me a failure? How long should I let this continue for? How can I safely stop it?! Here’s a little video.
The board is a ROG crosshair viii dark hero.
SOLVED: I got on tech support with ASUS and they told me to press the cmos reset button, so I did that, redid the flash correctly, then after some bios settings, I'm back in Windows. Phew! If you're thinking of doing a bios flash and you're in windows, USE THE EZ FLASH THING! This sucked! <3
So in this video the PC bios LED is blinking while the pc is turned off and power is plugged in.
Things I have tried :
Flashing bios with 2 different 16gb flash drives formatted to fat32 MBR
Unplugging RAM
Unplugging PSU and testing it (Since I wasn't aware of the bios issue before)
resetting CMOS battery and using the jumper to reset bios (followed the manual to a T)
What worked was something stupid as you see in the title which I read in a reddit comment, "as soon as the power is plugged click on the boot button before LEDs are on" which Indeed worked and I even could reboot my PC a few times, but shutting it down, it happens again.
Now this is not a new PC and the problem happened suddenly I did not change a thing, just was using it normally and went to sleep, the next day this happens. So I did not attempt any bios update or whatnot.
SPECS :
ROG STRIX B650E-F GAMING WIFI
Seasonic Vertex-PX 1200 80+ Platinum
G.Skill Trident Z5 RGB 32 GB (2 x 16 GB) DDR5-6000 CL30
Ryzen 7 7800X3D
RTX 5090
Windows 11 24H2 (26100.6899 build)
Bios 3279 (Latest)
Please let me know if I could provide further info and I will edit the OP with it.
UPDATE : the solution provided by u/jOta39 works as a nice workaround