It seems like there may be an issue with some of these X570 ASUS boards, as I had a similar problem with the Prime X570-P after flashing the bios to 0804. Half the time the computer posts but gets stuck at the logo screen, and the other half the time I was just getting a black screen with beep codes for a missing graphics card. I tried swapping out the graphics card, tried changing out ram, tried changing out processors even, tried to do the crashfree biz, and nothing worked, so I just RMA'd the motherboard back to Newegg and now I get to wait a couple of weeks for that nonsense to be processed and be sent a replacement. I'm fairly sure I didn't screw anything up in the bios flashing process, as this isn't my first rodeo, but now I'm afraid of trying to update the bios on the replacement board when I get it.

So finally usb option worked I put the 1407 bios in usb drive and it started flashing right away. Earlier i was trying with latest bios (2802). Some times i would get blank screen, some times board would get stuck on vga white light, and sometime on bios warning screen. Finally i thought of downloading older biox 1xxx, instead of using the 2xxx, and alls well that ends well. Thank you guys. Sent from my SM-M315F using Tapatalk

Clear the CMOS by turning off the power supply (unplug it if there is no switch), then either remove the battery or jumper the clear CMOS pins for 30 seconds. Once done with that, leave the power off for an hour (have to let the capacitors lose charge). Then turn it on (plug power back in). Hopefully it will boot up now. Be patient as these X570 boards seem to take a long time training for the RAM. Good luck!

BIOS Hard Reset procedure Power off the unit, switch the PSU off and unplug the PSU cord from either the wall or the power supply. Remove the motherboard CMOS battery for five minutes. In some cases it may be necessary to remove the graphics card to access the CMOS battery. During that five minutes, press the power button on the case for 30 seconds. After the five minutes is up, reinstall the CMOS battery making sure to insert it with the correct side up just as it came out. If you had to remove the graphics card you can now reinstall it, but remember to reconnect your power cables if there were any attached to it as well as your display cable. Now, plug the power supply cable back in, switch the PSU back on and power up the system. It should display the POST screen and the options to enter CMOS/BIOS setup. Enter the bios setup program and reconfigure the boot settings for either the Windows boot manager or for legacy systems, the drive your OS is installed on if necessary. Save settings and exit. If the system will POST and boot then you can move forward from there including going back into the bios and configuring any other custom settings you may need to configure such as Memory XMP profile settings, custom fan profile settings or other specific settings you may have previously had configured that were wiped out by resetting the CMOS. In some cases it may be necessary when you go into the BIOS after a reset, to load the Optimal default or Default values and then save settings, to actually get the hardware tables to reset in the boot manager. It is probably also worth mentioning that for anything that might require an attempt to DO a hard reset in the first place, it is a GOOD IDEA to try a different type of display as many systems will not work properly for some reason with displayport configurations. It is worth trying HDMI if you are having no display or lack of visual ability to enter the BIOS, or no signal messages.