You might have a new CPU that is not supported on your motherboard without a BIOS update. The CPU is physically compatible with the motherboard, and it will work just fine after a BIOS update, but the system will not POST until you update the BIOS.

How do I manually update my BIOS?

You copy the BIOS file to a USB drive, reboot your computer, and then enter the BIOS or UEFI screen. From there, you choose the BIOS-updating option, select the BIOS file you placed on the USB drive, and the BIOS updates to the new version.

Can you update BIOS without USB?

You don’t need a USB or flash drive to update BIOS. Simply download and extract the file and run it. … It will reboot your PC and will update your BIOS outside from the OS.