I updated the BIOS on my home server since it was using an old 2023 version, and now I'm facing a boot loop issue. After the update, all I get is a black screen with a blinking cursor for about 10 seconds, which I think is my HBA card trying to load. Then it shows the AS Rock BIOS options screen (Del/F2 Setup, F11 Boot), followed by another quick black screen before the whole process restarts. I can access the BIOS settings and even tried flashing back to a previous BIOS version, but it hasn't helped. I also can't boot from either my Unraid USB or a Hiren's USB, even though both of them work fine on another machine. This server has been running smoothly for the last 8 months until now. Any suggestions on how to troubleshoot this issue? I suspect it might be a RAM problem since RAM prices have shot up recently.
2 Answers
Try disconnecting all power from the server and removing the CMOS battery for about a minute. After putting it back in, reboot the system. Sometimes this can revert your motherboard to a previous BIOS version and might get things back on track.
Have you checked the boot device list in the BIOS to see if it recognizes your hard drive? That's usually a good starting point.

Yes, the BIOS sees the Boot USB and a couple of other USBs I've tested, but it won't boot from them.