On Sun, 2020-11-15 at 18:54 +0000, Jeffrey Layton wrote: > Good afternoon, > > I have a home workstation with an AMD CPU, Titan V GPU, 32 GB of memory, > and a root SSD and /home on spinning disks. > > Right now it has xubuntu 18.04 on it and it would boot fine. I shut it down > and restarted it to get an inventory before I put CentOS 8.2 on it. It > won't boot now. It gets to the grub menu and freezes. I can't use the > keyboard to select an item in the menu and I can't press enter to make it > boot or press "e" to edit the boot line. It just sits there (seemingly > forever). Here's what I've tred: > > 1. New keyboard/mouse - no change > > 2. Different monitor - no change > > 3. Booting from the CentOS 8.2 iso on a USB stick - no change > > 4. Replacing the TItan V card with a GT 1030 NV card - no change > > When booting from a USB stick, I get the BIOS splash screen and press "DEL" > to get to the menu, but the menu never shows up. It just freezes. > > This one has me stumped. Not being able to boot from a USB stick is really > puzzling. I've never seen that before. Possible bad MB? > > My apologies for using the list to help debug problems but since I'm moving > to CentOS 8.2 I thought people might have some ideas. It's not clear to me if the keyboard is working or not. I'd try a PS/2 keyboard if it doesn't and/or unplug and replug the USB one when the computer is frozen. What happens when you boot without a keyboard? Put a minimal amount of RAM in and go through all of the modules to see if one or some of them are broken. Replace the power supply. Replace mainboard.