[SOLVED] Booting to BIOS only

[humming]

Hey guys,
I've come to you for help with a problem. TL;DR After BIOS update PC boots only to BIOS.
Here is the long version:
Today I bought Ryzen 5600 nonX for my MSI B450 Gaming Pro Carbon AC. I turned on my pc (still with my working 2600X), downloaded the latest BETA Bios - 7B85v1F9 which adds support for 5600, 5700X and 5800X3D. I copied the files on USB went to bios, used M-Flash. BIOS updated successfully. Then came restart and PC boots to BIOS only. I thought maybe the updated BIOS cancelled support of my Ryzen 2600X so I swapped it with the new Ryzen 5600. Only for it to boot to BIOS again. Right now it's still in BIOS and BOOT LED is red. Things I've tried so far:

1. Disabled Secure Boot
2. Cleared CMOS
3. Left only CPU, 1RAM stick, SSD

So right now I'm kinda lost. Any other ideas would be appreciated. Thanks!

 

[rgd1101]

what the os? did you change to bios setting before to install windows?

does it see the ssd in bios?

 

[humming]

@rgd1101
Hello, the OS version is Windows 10 64bit and before installation I didn't change any settings.
Yes, I can see the SSD in Bios.

 

[rgd1101]

do you remember if you turn on legacy model?
did you use bitlocker?

 

[humming]

I'm not totally sure but I think there was Legacy + UEFI. I don't think I used bitlocker. When I check now I see this parameter:
BIOS CSM/UEFI Mode and its set to UEFI.

 

[rgd1101]

could try the csm mode

 

[humming]

Changed to CSM and now it booted. to windows. Is that good or bad?

 

[rgd1101]

it mean you have CSM turn on last time.
it is working. so it fine.

 

[humming]

I see, okay then. Thank you for your help. I will try to read more about CSM/UEFI.