Have a build with Gigabyte Mobo GA-AX370 Gaming 5 that wouldn't boot after several months of normal use. Thought it was the PSU, which I replaced. Computer booted up and was functional, however, after a few days of use, same problem. Unplugged everything, USB and Monitors and plugged in the PSU...it started up. Plugged in one monitor to the EVGA Geoforce GTX 1060 SC card, now had visual. Plugged in other monitor (one is HDMI and the other is DP)...both monitors working. My initial thought is that the BIOS wasn't working properly, checked the version and it is the F23 BIOS that is currently being used. Gigabyte BIOS updates are now using F50e, which is several generations newer than what I am currently using. I am just wondering if any one here has had any issues like this and if there might be other things such as memory or graphics card issues that should be addressed?