New Gigabyte B560M DS3H not booting

Juniperz · 11 Sep 2022 at 22:05

I have just fitted a new Gigabyte B560M DS3H (Socket LGA 1200) Micro ATX Motherboard, with a i3-10105 CPU, Crucial Ballistix 16GB (2x8GB) DDR4 RAM and a new power supply Corsair TX550M 550 W 80+ Gold. It all seemed to go well, all connections made etc, right up until I started it, of course.
It does the single beep POST, but only goes into the Gigabyte BIOS, I cannot get it to boot into Win10. The SSD is recognised by the BIOS as you can see from the image, but it won't boot to it. I have tried fiddling with settings, but nothing. Any ideas please?

Juniperz · 11 Sep 2022 at 22:12

Thanks - I did try that earlier I think, but I will go and give it another try. Whatever I did, it didn't even boot into BIOS, just a black screen with a static cursor at the far left.

Juniperz · 11 Sep 2022 at 22:25

Kind of regretting that I changed the CSM Support settings, because I now cannot get to BIOS at all - it just goes to a black screen with a static cursor left of centre, but no splash screen, so I cannot press DEL for BIOS settings...
I have disconnected the optical drive, still nothing.

Juniperz · 11 Sep 2022 at 22:44

Well I have never reset CMOS before, so that was new (thanks for the tip) - now back where I was in the 1st post i.e b&ggered
So much for upgrading the wife's PC while she was away for the weekend!

Juniperz · 15 Sep 2022 at 15:11

That is exactly what I have done. The last time I upgraded this PC with new MB, CPU & RAM (not HDD) I think Windows booted just fine, but not this time. I am about to bite the bullet and reinstall Windows destructively, which was not the plan (though I do have the data, but possibly not the MS Office key).

Won installer is saying that it's MBR and needs to be GPT, so I have to sort that first.

Any help welcome!

Juniperz · 15 Sep 2022 at 16:58

You are probably right. Funnily enough, I am about to replace the 500GB M.2 in my ThinkPad T490 with a 1TB, so that could work... The PC I broke is my wife's!
If I replace every single component, isn't Win10 going to complain about licensing?

Juniperz · 16 Sep 2022 at 17:12

Thanks Kurgen and Haz123. I had no activation issues the last time I upgraded MB, CPU & RAM...

Juniperz · 2 Oct 2022 at 19:02

Well I have finally (after being away and generally not getting round to the daunting task) got it working. Nobody was more surprised than me after I rebooted from the Win10 install USB / Troubleshoot / Command Prompt area, and got the Win login screen :-)

I had done some fiddling in DOS a couple of weeks and made it worse rather than better, but I just ran
MBR2GPT.EXE /convert /disk:0 /allowfullos
and all is well.
So that's new Gigabyte MoBo, CPU, RAM and PSU all upgraded with no issues in Win10, certainly no suggestion from System / Properties that it is unhappy about activation.