So, I've had a working build with this computer for about a year, but I recently decided to do some upgrades (GPU and OS). The board was working perfectly, but then I upgraded the BIOS to UEFI. The install went as expected - I booted to a dos bootable USB, the downloaded UEFI files from gigabyte ran, and when it finished, told me to power off the computer & remove the AC cable. I did that,and powered back on, but the fans spin up for 2 seconds & then stop. It waits about 3-5 seconds & tries again.... same thing... 2 seconds of fans spinning and then stop. It will keep doing this cycle until I shut it down.
Anyone have any ideas? I know that all my components work with this system... i just had them all working a day ago. The only thing that changed was the UEFI install.