Ooof. I hope it finishes for you. It should reboot after it is done by itself. I hope it comes back up one way or the other. Firmware probably wouldn't fix a boot failure that happens out of the blue that clearing the CMOS wouldn't fix. The good news is that the board has a recovery firmware image normally (Q-LED code F0 through F4 for the BIOS attempting to use the recovery image). The LED you are talking is the Flashback LED (in between the Flashback button and the USB port) or the Q-LED (which displays the code and is located below the bottom most long PCIE x16 slot)? What I hope is happening is that you didn't unzip the firmware on the USB and it hasn't actually started flashing the BIOS. What you are supposed to do is unzip the file and either run the BIOSRenamer.exe file OR manually rename the .cap file to SX570EG.CAP on your USB stick. You then put your USB stick into the Flashback USB port (the very bottom one) and then press and hold the Flashback button for 3 seconds. Once the LED flashes 3 times and then starts flashing the BIOS. If you didn't rename the file, then I'd probably power it off since it has been roughly an hour, rename the file, clear the CMOS which will reset BIOS settings to the defaults and try to flash again. Though flashing the CMOS is optional and isn't always required, I definitely recommend it. You can clear the CMOS by completely powering down the PC, unplugging it and waiting about 10 seconds. All of the LED's should be off at this point and capacitors discharge. Now locate the CLRTC jumper pins (should be just 2 pins) located to the right of the bottom long PCIE x16 slot, left of the SATA connectors, Below the M.2 slot and above the RGB_HEAD2 pins. Apparently ASUS didn't make this a 3 pin with a jumper just sitting there for you to use, so you'll have to use something like a screw driver and lightly touch it between both pins at the same time (no pressure needed, it just needs to touch both) for a second. Now remove the screw driver and plug the cord back in try to do the Flashback process again. There is a CMOS battery, after powering down, that you can pop out to do the same thing but I wouldn't recommend it since the cradles can sometimes break easily when trying to get the battery out and the only way to fix that is to re-solder it back into place. Plus it is between the top two PCIE x16 slots and probably inconveniently under your GPU. IF your BIOS flashes and comes back up, it may still fail to boot due to the original problem. If that happens, find your Q-LED display (not the Flashback LED) and check the Q-Code table in the appendix of your motherboard manual to figure out why it is failing POST. Hopefully it is just 50 up to 55 and you just need to reseat your RAM sticks. You can also follow the POST process as it does its different test by watching the codes progress. If it was E8 thru EB, then the CMOS reset should have fixed that anyway. Good luck! Answer from Deleted User on reddit.com