New M/B-CPU refuses to boot

[MR]

On Sat, Oct 30, 2021 at 5:11 PM MR ZenWiz <mrzenwiz at gmail.com> wrote:

> Where do I start?
>
> I decided I wanted to upgrade my Intel i7 AsRock 97 mobo combo with a
> newer, higher powered processor and more memory.
>
> I bought an AMD Ryzen 9 5950 with an ASUS Tuf X570 Pro m/b, 32Gb of
> DDR 3200 RAM and a VisionTek Radeon HD 5450 video card (because the
> m/b needs a CPU with onboard graphics and the 5950 doesn;t have that
> and requires a video card).
>
> I got it to boot up into the PROM, checked the specs and told it to go
> ahead and boot.
>
> Nada - black screen.
>
> Originally I got the grub prompt, but frankly I don't know what to do
> from there.
>
> It didn't even allow PROM access every time, just occasionally.
>
> I tried using my Xubuntu UDB drive, but even when I got the boot
> prompt, it never came back with anything on the screen.
>
> I tried disabling the UEFI secure boot in the PROM, and now all I get
> is black.  NOthing else.  It refuses to boot the SSD (which has a UEFI
> partition) and it refuses to boot off the flash drive.
>
> That was a lot of work and I'd rather not have to pay for someone to
> do this if I can avoid it.
>
> Help?
>
> Update:

I reset the PROM (removed and reinstalled the battery on the mobo), and
plugged in both an HDMI monitor and my main (DVI-HDMI 2k) monitor, and it
responds on the smaller HDMI screen.

Still can't boot, and when I try to boot the flash drive, it reads the
drive and then hangs at the underscore cursor prompt.

Still lost here...

Mark
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